Class / Patent application number | Description | Number of patent applications / Date published |
123447000 | With accumulator | 81 |
20080216797 | HIGH PRESSURE FUEL PUMP CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - In a high pressure fuel pump control apparatus for an internal combustion engine which has a high pressure fuel pump of an engine driven type capable of pressure feeding a controlled amount of fuel by driving a fuel suction valve to close at predetermined timing in a fuel delivery stroke, fuel pressure in an accumulator is swiftly raised by reliably pressure feeding a maximum amount of fuel from a fuel delivery stroke immediately after engine starting while avoiding heat generation by a solenoid for controlling the fuel suction valve, whereby deterioration of a combustion state and exhaust emissions at engine starting can be prevented. A starting time control section continuously energizes the solenoid over a period from the beginning of engine starting until when it becomes possible to perform valve closing timing control on the fuel suction valve based on the rotational position of the engine after completion of cylinder identification. | 09-11-2008 |
20080236547 | CONTROL APPARATUS CAPABLE OF SUITABLY CONTROLLING FUEL INJECTION APPARATUS REGARDLESS OF VARIATION IN FUEL PRESSURE IN ACCUMULATOR - A control apparatus is provided to control a fuel injection apparatus. The fuel injection apparatus includes an accumulator that accumulates high-pressure fuel, at least one injector that injects the high-pressure fuel accumulated in the accumulator into a cylinder of an internal combustion engine, and a pressure sensor that senses fuel pressure in the accumulator and outputs a signal indicative of the sensed fuel pressure. The control apparatus includes an estimator, a determiner, and a setter. The estimator estimates an actual injection duration of the injector. The determiner determines, during the actual injection duration estimated by the estimator, a value of the fuel pressure in the accumulator based on the signal output from the pressure sensor. The setter sets a manipulated variable for controlling fuel injection quantity of the injector based on the value of the fuel pressure determined by the determiner. | 10-02-2008 |
20080271709 | Combustion engine technology - A fuel system for use in a combustion chamber of a compression ignition internal combustion engine comprises a pump arrangement having a pump chamber for fluid and a piston which is movable outwardly from the combustion chamber in response to pressure generated within the combustion chamber as a result of combustion so as to pressurise fluid within the pump chamber. The system also includes a control valve assembly for controlling the supply of fluid that is pressurised within the pump chamber to an accumulator volume. In one particular aspect, the invention provides a fuel system for use in an engine having at least two engine cylinders, comprising a first pump arrangement associated with one of the engine cylinders and a second pump arrangement associated with the other of the engine cylinders, each of the first and second pump arrangements having a pump chamber for fluid and a piston which is movable outwardly from the combustion chamber in response to pressure generated within the combustion chamber as a result of combustion so as to pressurise fuel within the pump chamber. At least one control valve assembly controls the supply of fluid that is pressurised within the pump chamber of at least one of the pump arrangements to an accumulator volume. | 11-06-2008 |
20080283026 | FUEL SYSTEM, ESPECIALLY OF THE COMMON RAIL TYPE, FOR AN INTERNAL COMBUSTION ENGINE - A fuel system for an internal combustion engine includes at least one first fuel pump and a pressure region into which the fuel pump pumps and which communicates with an elastic volume reservoir. The elastic volume reservoir has a characteristic pressure/volume curve, which is defined by at least two points. It is proposed that a first point is defined by a first volume at a first pressure that is somewhat greater than a vapor pressure of the fuel at ambient temperature, and that a second point is defined by a second volume and a second pressure in the pressure region that corresponds to a maximum pressure; the difference between the first and second volumes corresponds at least approximately and at least to a value by which the volume of the fuel in the pressure region decreases upon cooling down from a maximum temperature to ambient temperature. | 11-20-2008 |
20090025684 | SYSTEM, METHOD AND COMPUTER READABLE MEDIA FOR CONTROLLING AT LEAST ONE FUEL DELIVERY CHARACTERISTIC DURING A COMBUSTION EVENT WITHIN AN ENGINE - A system is provided for controlling at least one fuel delivery characteristic during a combustion event within an engine. The system includes an accumulator having a variable volume, where the accumulator is configured to hold fuel at a variable pressure based on the variable volume. The system further includes a combustion chamber coupled to the accumulator. The variable volume is varied during the combustion event such that at least one fuel delivery characteristic of the fuel delivered from the accumulator into the combustion chamber is varied during the combustion event. A method and computer readable media are also provided for controlling at least one fuel delivery characteristic during a combustion event within an engine. | 01-29-2009 |
20090025685 | Injection System for an Internal Combustion Engine, and Internal Combustion Engine - An injection system for an internal combustion engine has at least one injector ( | 01-29-2009 |
20090050109 | Injection system having a device for metering fuel into an exhaust system of an internal combustion engine and a method for this purpose - In an injection system having a device for metering fuel into an exhaust system of a Diesel engine, and a method for controlling the injection of fuel into the exhaust system, wherein the injection system has a high-pressure pump which feeds fuel to an accumulator under high pressure and injectors which inject fuel from the accumulator into the combustion chambers of the internal combustion engine, a fuel spray nozzle arranged in the exhaust system is in communication with the injection system via a fuel metering unit including a control valve and a metering valve and a pressure regulating valve is arranged between the control valve and the metering valve for controlling the pressure of the fuel being metered by the metering valve for injection into the exhaust system via the spray nozzle. | 02-26-2009 |
20090050110 | ACCUMULATION-VOLUME FUEL INJECTION SYSTEM FOR AN INTERNAL-COMBUSTION ENGINE - The injection system comprises a pump designed to send fuel at high pressure to an accumulation volume, for example formed by a common rail, for supplying a plurality of injectors. The pump comprises at least one pumping element actuated with reciprocating motion with a compression stroke at a sinusoidal speed, in synchronism with each step of fuel injection. The injection system comprises at least one by-pass solenoid valve, which is controlled by a chopper control unit for modulating the delivery of the pumping element by varying both the instant of start and the instant of end of delivery during the compression stroke, in such a way that the delivery is synchronous with the injection phase. | 02-26-2009 |
20090071444 | FUEL SUPPLY APPARATUSES - It is an object of the present invention to inhibit production of vapor within fuel when an engine is at a high temperature and to inhibit change of amount of the fuel injected from an injector. | 03-19-2009 |
20090084355 | System and method for metering fuel in a high pressure pump system - A system and method for metering fuel is provided which includes a fuel supply line and a metering valve in fluid connection with the fuel supply line to control a flow of fuel through the fuel supply line. The valve is movable into a closed position to block a primary flow of fuel and create a leakage fuel flow in the fuel supply line downstream of the metering valve. The system also includes a venturi apparatus fluidly coupled to the fuel supply line upstream of the metering valve. The venturi apparatus is further coupled to the fuel supply line downstream of the metering valve to direct the leakage fuel flow out of the fuel supply line. | 04-02-2009 |
20090084356 | CONTROLLER FOR ACCUMULATOR FUEL INJECTION SYSTEM - A common-rail fuel injection system is equipped with a common-rail, a fuel pump | 04-02-2009 |
20090114191 | LIFT PUMP CONTROL FOR A TWO PUMP DIRECT INJECTION FUEL SYSTEM - An economical method for controlling a lift pump operating as part of a direct injection fuel system is described. According to the method, at least two distinct operating modes are provided. | 05-07-2009 |
20090114192 | Injector for accumulator injector system - In an injector for an accumulator injection system comprising an injector having an injector housing with an injection nozzle and an actuator for operating the injection nozzle arranged in a fuel-filled pressure space of the injector housing wherein the actuator includes a piezoelectric element disposed between an actuator head and an actuator the base with a fuel-tight casing at least partially surrounding the actuator head and the actuator base, the casing is engaged in a sealing fashion by a first annular element with the actuator base and by a second annular element with the actuator head. | 05-07-2009 |
20090145402 | FUEL SUPPLY SYSTEM HAVING FUEL FILTER INSTALLED DOWNSTREAM OF FEED PUMP - A fuel supply system for an accumulator fuel injection system designed to inject fuel, as stored in an accumulator, into an internal combustion engine through a fuel injector The fuel supply system includes a feed pump working to pump the fuel out of a fuel tank and a fuel filter disposed between the feed pump and a high-pressure pump working to deliver the fuel to the accumulator. The fuel supply system also includes a return path and a control valve. When the pressure of the fuel between the fuel filter and the flow rate control valve exceeds a first set pressure, the control valve opens the return path to return the fuel from downstream to upstream of the feed pump to keep the pressure of fuel supplied to the flow rate control valve below the first set pressure, thereby controlling the flow rate of the fuel passing through the fuel filter. | 06-11-2009 |
20090145403 | FUEL SUPPLY SYSTEM HAVING FUEL FILTER INSTALLED DOWNSTREAM OF FEED PUMP - A fuel supply system for delivering fuel to, for example, a common rail of a diesel engine fuel injection system. The fuel supply system includes a priming pump, a feed pump, a fuel filter disposed downstream of the feed pump, a return path, and a return valve. When the pressure of the fuel between the feed pump and the fuel filter exceeds a first set pressure, the return valve is placed in a first open position to open the return path to return the fuel from downstream to upstream of the feed pump. When the pressure of the fuel, as fed by the priming pump, exceeds a second set pressure, the return valve is placed in a second open position to open the return path to direct the fuel, as fed by the priming pump, to upstream of the fuel filter to prime the fuel filter directly. | 06-11-2009 |
20090159048 | Injected Fuel Pressure Boosting Device - An injected fuel pressure boosting device provided with a large diameter piston, a medium diameter piston, and a small diameter piston. A high pressure chamber filled at high pressure at all times is formed at the outer end of the medium diameter pistons, while a pressure boosting chamber is formed at the outer end of the small diameter piston. A pressure control chamber is formed on the end face of the large diameter piston on the small diameter piston side. When high pressure fuel is supplied to the pressure control chamber, the large diameter piston moves to the medium diameter piston side, that is, the pressure boosting preparation position. At this time, the leaked fuel outflow port is closed by the end face of the large diameter piston. | 06-25-2009 |
20090165748 | PETROLEUM FUEL SUPPLY METHOD AND CIRCUIT - A fuel supply method and circuit including at least one flow-rate regulating valve is provided at a return pipe for returning excess return fuel from a combustion chamber side. During the combustion operation, the fuel from the supply pipe is supplied to a fuel injection nozzle with the return pipe closed or restricted to a predetermined opening degree and the back pressure of the return pipe raised by at least one flow-rate regulating valve. The fuel is supplied to the fuel injection nozzle as being pressurized by the return back pressure, so that the fuel injection nozzle supplies to the combustion chamber the fuel that has been heated to a high-temperature. The return fuel is circulated from the return pipe directly through the supply pipe, and mixed in a sub-tank with low-temperature fuel from a fuel tank. The mixed fuel is supplied to the fuel injection nozzle. | 07-02-2009 |
20090199820 | PRESSURE CONTROL VALVE WITH LIMP-HOME AND VENTILATION FUNCTION - The invention relates to a fuel injection system for internal combustion engines, having a high-pressure accumulator which has a cavity under system pressure. Provided to the high-pressure accumulator is a pressure control valve that can be actuated electromagnetically. The cavity can be connected by the latter to a low-pressure side of the high-pressure accumulator. Arranged between the cavity and the low-pressure side of the high-pressure accumulator is a check valve which enables the high-pressure accumulator to be filled from the low-pressure side to the system pressure side. | 08-13-2009 |
20090241902 | INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a cylinder head having a plurality of intake ports; throttle devices including a plurality of respective intake passages equipped with throttle valves therein; a plurality of fuel injection valves for injecting fuel into the corresponding intake passages; a fuel pipe adapted to supply fuel to the fuel injection valves; and a pulsation damper connected to the fuel pipe to damp fuel pressure pulsation. In the engine, a connection pipe coupled to the pulsation damper is formed between a plurality of branch portions with respect a longitudinal direction of the fuel pipe, adapted to deliver fuel from the fuel pipe to the fuel injection valves and the connection pipe is disposed to at least partially overlap the fuel injection valve as viewed from the longitudinal direction of the fuel pipe. | 10-01-2009 |
20090277420 | Accumulator-type fuel injection apparatus and internal combustion engine provided with that accumulator-type fuel injection apparatus - In one embodiment, the high-pressure pump ( | 11-12-2009 |
20090288638 | METHOD AND SYSTEM FOR CONTROLLING OPERATING PRESSURE IN A COMMON-RAIL FUEL INJECTION SYSTEM, PARTICULARLY FOR A DIESEL ENGINE - In a fuel injection system of an internal combustion engine that includes, but is not limited to injectors (I | 11-26-2009 |
20090320795 | METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - In a method and a device for operating an internal combustion engine with a fuel pump, which on the drive side is coupled with a camshaft or a crankshaft, and a fuel accumulator, which is supplied by the fuel pump and to which a pressure sensor is assigned for sensing the pressure in the fuel accumulator, to each cycle of the internal combustion engine a first and a second crankshaft rotation (CRK_R | 12-31-2009 |
20090320796 | Internal Combustion Engine - An internal combustion engine includes a low-pressure fuel feed system ( | 12-31-2009 |
20100000496 | Method for carrying out a high-pressure start of an internal combustion engine, control facility and internal combustion engine - In known methods for carrying out a high-pressure start of an internal combustion engine, inconvenient starting behaviour can sometimes occur. A method for carrying out a high-pressure start of an internal combustion engine ( | 01-07-2010 |
20100012091 | IN-LINE NOISE FILTERING DEVICE FOR FUEL SYSTEM - A fuel injection system includes a fuel supply rail, a fuel injector configured to control the delivery of fuel from the fuel supply rail, and a noise filtering device engaging an upstream end of the fuel injector and/or positioned at least partially within the fuel injector. The noise filtering device defines a fuel passage configured to direct fuel from the fuel supply rail into the fuel injector. The noise filtering device can include one or more of several features including a pocket, a wrap-around shape to conform to the inlet end of the fuel injector, a face-sealing portion, a compression section, and a plurality of parallel restriction passages. | 01-21-2010 |
20100037862 | Fuel Injector Assembly and Internal Combustion Engine Comprising Such an Assembly - This fuel injector assembly ( | 02-18-2010 |
20100043753 | SYSTEM AND METHOD FOR CONTROLLING THE FUEL INJECTION EVENT IN AN INTERNAL COMBUSTION ENGINE - A controller, in electrical communication with the one or more of the injectors and a high-pressure fuel pump, generates a first signal responsive to which the valve in the injector opens or closes and a second signal responsive to which the high-pressure fuel pump increases or decreases the pressure level in the fuel accumulator. The system may also include one or more sensors to detect a pressure within the air manifold and to detect the pressure within the fuel accumulator. The controller is programmed to calculate an in-cylinder gas pressure. When the engine is operating at a maximum engine load and the in-cylinder gas pressure reaches or exceeds a maximum pressure limit, the controller transmits one or more signals to adjust the fuel injection timing and/or adjust the pressure in the fuel accumulator to maintain NO | 02-25-2010 |
20100050989 | FUEL INJECTION SYSTEM - A fuel injection system for an internal combustion engine comprises: a first fuel injector which is arranged within a housing unit; an accumulator volume for supplying fuel to the first fuel injector; a first fuel pump arrangement comprising a pumping plunger which is driven, in use, to cause pressurisation of fuel within a first pump chamber; a first metering valve which is operable to control fuel flow into the first pump chamber; a first fuel passage providing communication between the first pump chamber and the accumulator volume; and a first non-return valve located in the first fuel passage between the first pump chamber and the accumulator volume; wherein the first fuel injector communicates with the first fuel passage at a position between the first non-return valve and the accumulator volume; and wherein communication between the first fuel injector and the accumulator volume is uninterrupted. | 03-04-2010 |
20100065020 | FUEL INJECTOR - To provide a fuel injector that has excellent durability with respect to pressure of high-pressure fuel and can accurately perform injection control even when injecting even higher pressure fuel. | 03-18-2010 |
20100089366 | FUEL INJECTION CONTROL DEVICE - A high-pressure pump section pumps fuel in a fuel tank into a delivery pipe. An injector injects the fuel in the delivery pipe directly into a combustion chamber of an engine. An ECU calculates fuel injection quantity based on an operation state of the engine and calculates fuel injection time based on the fuel injection quantity and pressure of the fuel in the delivery pipe. The ECU calculates fuel injection start timing based on the operation state of the engine. The ECU sets the fuel injection time and the fuel injection start timing as a base injection period. When a fuel inflow period, in which the high-pressure fuel flows into the delivery pipe with the fuel pumping by the high-pressure pump section, overlaps with the base injection period, the ECU changes the base injection period to eliminate or reduce the overlap. | 04-15-2010 |
20100095934 | Automobile-Use High Pressure Fuel Injection Accumulator-Distributor and Method of Production of the Same - An automobile-use high pressure fuel injection accumulator-distributor comprised of a body of an automobile-use high pressure fuel injection accumulator-distributor to which pipe attachment holders for attaching fuel distribution pipes for distributing fuel to injection nozzles at an equal pressure are joined by liquid phase diffusion bonding etc., wherein each holder is comprised of a tube part at the pipe side and a partial cone-shaped skirt at the end of the rail body side, each holder skirt has a shape spreading in a partial cone shape toward the joint face end with an angle from the holder tube part side face of 10° or more in a range of a length of 2 mm or more in the holder axial direction at the outer circumference of the end of the holder at the joint face side, the rail body has holder joint position determining guide grooves at its holder joint positions, each guide groove is comprised of a groove inner circumferential wall of a size enabling engagement with a holder joint inner circumference, a groove bottom forming a joint face with the holder, and a groove outer circumferential wall of a partial cone shape bulging out to the inner side parallel to the holder skirt from the groove bottom toward the holder side at a depth of 2 mm or more, and a metal ring is plastically deformed and press-fit into a clearance of 0.5 mm or more between each holder skirt and the groove outer circumferential wall and parallel to the joint face. | 04-22-2010 |
20100126468 | METHOD OF MANUFACTURING AND INSTALLATION OF HIGH PRESSURE LIQUID LPG FUEL SUPPLY AND DUAL OR MIXED FUEL SUPPLY SYSTEMS - A high vapor pressure liquid fuel (e.g. LPG) injection system is provided that keeps the fuel liquid at all expected operating temperatures by use of a high pressures pump capable of at least 2.5 MPa pressures. The fuel can be injected directly into the cylinder or into the inlet manifold of an engine via axial or bottom feed injectors and also could be mixed with a low vapor pressure fuel (e.g. diesel) to be injected similarly. The fuel, mixed or unmixed, can be stored in an accumulator under high pressure assisting in keeping the engine running during fuel changeovers and injection after a period of time as in re-starting the engine. The same injectors can be used to inject any of the fuels or mixtures of them. | 05-27-2010 |
20100132668 | METHOD FOR DETERMINING A CONTROLLED VARIABLE FOR PRESSURE CONTROL OF A HIGH-PRESSURE ACCUMULATOR IN AN INJECTION SYSTEM - In a method for determining a controlled variable of pressure control of a high-pressure accumulator of an injection system, a setpoint pressure gradient value is determined in the high-pressure accumulator as a function of the maximum possible actual pressure gradient value. | 06-03-2010 |
20100139620 | METHOD FOR CONTROLLING AN INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - In a method for pressure control in an injection system of an internal combustion engine, a pump efficiency dependent upon the type of pump is taken into account in the control of a high-pressure stored value. To this end, the pump efficiency may be determined based on a stored table or a proximity function. | 06-10-2010 |
20100170476 | FUEL INJECTION DEVICE - The invention relates to an injection device for injecting high-pressure fuel into the combustion chamber of an internal combustion engine, said device comprising an injection valve assigned to a discrete reservoir chamber ( | 07-08-2010 |
20100212636 | PRESSURE BOOSTING SYSTEM FOR AT LEAST ONE FUEL INJECTOR - The invention relates to a pressure boosting system for at least one fuel injector of a high pressure injection system of an internal combustion engine, having a hydraulic pressure booster that is actuated by a control valve. The hydraulic pressure booster is configured with a pressure boosting piston, which comprises a first pressure booster piston part having a first diameter and a second pressure booster piston part having a second diameter, wherein the first diameter is greater than the second diameter. The pressure booster piston is disposed within a hydraulic reservoir chamber, onto which pressure is applied, together with the first pressure booster piston part having the greater diameter, wherein the accumulator chamber in turn is configured within a base body. The base body has a piston guide body for at least one of the pressure booster piston parts. The piston guide body is at least partially surrounded by an annular space, which is part of the hydraulic accumulator chamber. | 08-26-2010 |
20100229831 | METHOD FOR ADJUSTING A FUEL PRESSURE - A method is provided for adjusting a fuel pressure in a high pressure fuel accumulator of an accumulator injection system of an internal combustion engine as a first drive motor which, together with a second drive motor, is situated in a drive train, in which variable torque contributions of the internal combustion engine and of the second drive motor are superposed, an actual value of the fuel pressure, which sets in in response to a lower torque contribution of the internal combustion engine in the high pressure fuel accumulator, deviating from a setpoint value specified for higher torque contributions and at which the actual value, in response to an increase in the torque contribution from the lower value to the higher torque contribution of the internal combustion engine being adjusted to its higher setpoint value. The method stands out in that the adjustment is performed so that a rate of a change in the actual value does not exceed a specified boundary value during the adjustment. A control device equipped to perform the method is also provided. | 09-16-2010 |
20100258083 | FUEL PRESSURE REGULATING SYSTEM - A fuel pressure regulating system for an internal combustion engine has a pressure accumulator which is used to store fuel under pressure and to feed the combustion chambers of the internal combustion engine by fuel-supplying injectors, a high-pressure pump which supplies a fuel mass flux to the pressure accumulator, a first valve via which the fuel can be guided out of the pressure accumulator, and a second valve for restricting the fuel mass flux. The system is provided with a first control loop having the first valve as an actuator for regulating the pressure in the pressure accumulator, and a second control loop having the second valve as an actuator for regulating the pressure in the pressure accumulator, and the two control loops are embodied as cascade regulators, the first control loop being a master regulator and the second control loop being a follower regulator. | 10-14-2010 |
20100269790 | METHOD OF AND DEVICE FOR CONTROLLING PRESSURE IN ACCUMULATION CHAMBER OF ACCUMULATION FUEL INJECTION APPARATUS - A method of and a device for controlling a pressure is provided in which control performance of accumulation chamber pressure is not deteriorated even in the presence of a disturbance by estimating, with observer control, a disturbance pressure that acts on an accumulation chamber (common rail) constituting an accumulator fuel injection apparatus adapted for use in a diesel engine and the like, and by correcting a pump discharge command with a compensation value capable of compensating for the estimated disturbance pressure. | 10-28-2010 |
20100275881 | Accumulator Fuel Injection Device - To provide an accumulator fuel injection device, so as to stabilize the operation of a pressure control valve for controlling a fuel pressure in an accumulator. The accumulator fuel injection device includes a pressure control valve | 11-04-2010 |
20100275882 | Fuel Supply Device For Engine - To make it possible to pump a fuel from a supply pump into an accumulator, even when a pressure control means provided with a pressurized fuel pathway is out of action. In a fuel supply system of an engine, which is provided with pressure control means | 11-04-2010 |
20100282211 | FUEL DELIVERY SYSTEM - A fuel delivery system for an internal combustion engine, the system comprising at least one fuel injector, said fuel injector comprising a control chamber having an inlet for receiving highly pressurised fuel and an outlet enabling fuel to flow out of the control chamber into a back-leak passage associated with the fuel injector, wherein the fuel injector is operable between an injecting state and a non-injecting state in dependence on the fuel pressure within the control chamber. The system further includes a pressure regulator for regulating the fuel pressure within the back-leak passage so as to maintain the injector back-leak pressure at a predetermined target value which is below atmospheric pressure. | 11-11-2010 |
20110023831 | FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A fuel injection system for an internal combustion engine has a fuel distributor ( | 02-03-2011 |
20110120417 | METHOD AND DEVICE FOR CONTROLLING THE FUEL PRESSURE IN THE PRESSURE ACCUMULATOR OF A COMMON-RAIL INJECTION - In a method and a device for controlling the fuel pressure in the pressure accumulator of a common-rail injection system, the difference between the actual engine speed and a target engine speed is established, and an injection time is determined based on the determined difference. The fuel pressure is controlled according to the determined injection time. | 05-26-2011 |
20110259300 | INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - An injection system for an internal combustion engine has a prefeed pump for delivering fuel from a fuel tank, a high pressure pump for delivering the fuel to a fuel accumulator arranged downstream of the prefeed pump, an accumulator return line arranged downstream of the fuel accumulator and used to return the fuel from the fuel accumulator to the fuel tank, and a valve arranged in the accumulator return line and by which the fuel can be optionally supplied to the fuel tank or to a tank bypass line which hydraulically leads to a point between the prefeed pump and the high pressure pump. A pressure relief valve is arranged in the accumulator return line downstream of the valve and upstream of the fuel tank. The pressure relief valve is suitably designed to allow adjustment of a fuel pressure in the accumulator return line upstream of the pressure relief valve. | 10-27-2011 |
20110259301 | PRESSURE FLUCTUATION CONTROL DEVICE FOR CONTROLLING PRESSURE FLUCTUATION IN UPSTREAM SIDE OF COMMON RAIL - A device for controlling a variation in pressure upstream of a common rail, the device being an extremely simple and small-sized compact device which is used in a pressure accumulating common rail type fuel injection apparatus. The device for controlling a variation in pressure upstream of a common rail can supply high-pressure fuel to the common rail in a stable pressure state by preventing pulsation of a high-pressure pump from occurring in each cylinder of the pump and also preventing generation of a surge pressure caused by opening and closing of a check valve. The device is provided with a secondary common rail which is connected to the fuel outlets of the check valves each provided to each of the cylinders of the high-pressure pump and which has a volume equal to or less than the volume of the common rail, and the device is also provided with injection pipes which connect between the common rail and the fuel outlets of the secondary common rail. The number of the injection pipes is set to be less than the number of the check valves each provided to each of the cylinders of the high-pressure pump. | 10-27-2011 |
20110277730 | FUEL INJECTION SYSTEM - A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system. | 11-17-2011 |
20110315117 | FUEL SYSTEM HAVING ACCUMULATORS AND FLOW LIMITERS - A fuel system for an engine is disclosed. The fuel system may have a pump, a plurality of fuel injectors, and a plurality of fuel accumulators. Each of the plurality of fuel accumulators may be disposed at least partially within a different cylinder head of the engine in fluid communication with an associated fuel injector of the plurality of fuel injectors. Each of the plurality of fuel accumulators may also be in fluid communication with adjacent fuel accumulators of the plurality of fuel accumulators. At least one of the plurality of fuel accumulators may also be in fluid communication with the pump. The fuel system may further have a plurality of flow limiters. Each of the plurality of flow limiters may be disposed between an associated fuel accumulator of the plurality of fuel accumulators and an associated fuel injector of the plurality of fuel injectors. | 12-29-2011 |
20120017874 | Fluid dispenser as well as method for the provision of a work fluid by means of a fluid dispenser - The invention relates to a fluid dispenser for the provision of a work fluid ( | 01-26-2012 |
20120042853 | CONTROLLER FOR PRESSURE REDUCING VALVE - A controller for a pressure reducing valve is applied to a fuel injection system which is provided with a pressure reducing valve in a common-rail and a fuel pressure sensor detecting a fuel pressure in a fuel supply passage from the accumulator to an injection port of the fuel injector. The controller includes a fuel-pressure-variation detector for detecting a fuel pressure variation timing at which a detection value of the fuel pressure sensor is varied due to an opening operation or a closing operation of the pressure reducing valve. The controller further includes a response-delay-time computing portion for computing a response delay time of the pressure reducing valve based on a command timing and a fuel pressure variation timing. | 02-23-2012 |
20120103308 | Two-Way Valve Orifice Plate for a Fuel Injector - A pressure balancing orifice plate for a fuel injector device may include a cylindrical body having a top surface, a bottom surface, an annular outer surface, and a body longitudinal axis, a balance pressure relief orifice extending from the top surface to the bottom surface, and a raised valve seat extending upwardly from the top surface and surrounding the balance pressure relief orifice. The valve seat may have a central seat surface encircling the balance pressure relief orifice and a plurality of leaf portions extending radially outwardly from the central seat surface and defining drainage channels there between. A width W | 05-03-2012 |
20120145126 | Dual Fuel Supply System for an Indirect-Injection System of a Diesel Engine - The present invention relates to fuel systems for diesel engines. In particular, the invention relates to a dual fuel supply system ( | 06-14-2012 |
20120174894 | Fuel system and method for operating a fuel system - A fuel system, in particular of a motor vehicle, with a fuel tank and a ventilation device for ventilating the fuel tank, wherein the ventilation device has at least one separation device which has a temporary accumulator for liquid fuel. The separation device has a fill level determination device for determining the fill level of in the temporary accumulator. The invention further relates to a method for operating a fuel system. | 07-12-2012 |
20120204834 | Injection System for an Internal Combustion Engine - An injection system for an internal combustion engine ( | 08-16-2012 |
20120216779 | FUEL SUPPLY DEVICE - A fuel supply device includes: an injector that injects and supplies fuel to an engine; a pressure accumulator communicating with a cylinder of the engine through a communication passage; a valve that opens or closes the communication passage; and a controller that controls the injector and the valve. When the engine is rotated, an air-fuel mixture is compressed in the cylinder, and an accumulating portion of the controller accumulates the air-fuel mixture in the pressure accumulator. When the engine is restarted, a supplying portion of the controller supplies the air-fuel mixture accumulated in the pressure accumulator to the cylinder. | 08-30-2012 |
20120234295 | DIAGNOSTIC APPARATUS FOR FUEL INJECTOR - Based on a detection signal of a fuel pressure sensor provided in a first fuel injector, an ECU determines whether a fuel pressure in a first fuel injector is increased over a specified amount when a second fuel injector provided with no fuel pressure sensor terminates a fuel injection. When the ECU determines that the fuel pressure in the first fuel injector is increased over a specified amount, it is diagnosed that the second fuel injector does not have a malfunction of continuous injection. | 09-20-2012 |
20120255521 | FUEL SUPPLY DEVICE AND FUEL SUPPLY CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A fuel supply device includes a low-pressure fuel pump, a high-pressure fuel pump, an accumulator for accumulating the pressurized fuel, fuel injection valves, a relief valve for restricting an upper limit value of a fuel pressure in the accumulator, a high-pressure fuel pressure sensor, and a control unit for setting a target fuel injection pressure, controlling the high-pressure fuel pump so that the fuel pressure in the accumulator reaches the target fuel injection pressure, and regarding the present target fuel injection pressure as a detection value of the high-pressure fuel pressure sensor and setting the high-pressure fuel pump in an operational state with a maximum discharge amount or a non-operational state when detecting an abnormality of the high-pressure fuel pressure sensor. | 10-11-2012 |
20120279473 | FUEL INJECTION SYSTEM WITH INTEGRATED HIGH-PRESSURE ACCUMULATOR - The invention relates to a fuel injection system of an internal combustion engine, comprising a high-pressure pump. A high-pressure outlet ( | 11-08-2012 |
20130087124 | FUEL SYSTEM FOR INJECTION OF A FUEL MIXTURE IN A COMBUSTION ENGINE - A fuel system for injection of a fuel mixture in a combustion engine includes an inlet circuit ( | 04-11-2013 |
20130125862 | FUEL-PRESSURE-SENSOR DIAGNOSIS DEVICE - A fuel-pressure-sensor diagnosis device is applied to a fuel injection system having a plurality of fuel pressure sensors detecting a fuel pressure which is provided to a fuel injector of each cylinder, and a control portion controlling the fuel injectors by using a computed result which is computed based on a variation in the fuel pressure detected by the fuel pressure sensor due to a fuel injection. Two pressure sensors of which pulsation values of the detected fuel pressure are in a specified range are selected among the multiple fuel pressure sensors. For example, a pair “A” refers to the sensors # | 05-23-2013 |
20130220275 | FUEL ACCUMULATOR BLOCK FOR TESTING HIGH-PRESSURE COMPONENTS OF FUEL INJECTION SYSTEMS - A fuel accumulator block is provided for testing high-pressure components of fuel injection devices. The fuel accumulator block includes an accumulator body and at least one pressure control valve, which is accommodated in a receptacle in the accumulator body. The accumulator body is connected to a test line for a test medium and to a cooling line for a cooling medium. Within the accumulator body a test line run is developed for the test medium and a cooling line run is developed for the cooling medium. The cooling line run has at least one section which runs in the vicinity of the receptacle for the pressure control valve. | 08-29-2013 |
20130247875 | FUEL INJECTION UNIT, A METHOD OF OPERATING SUCH AND AN INTERNAL COMBUSTION ENGINE - A novel fuel injection unit for a large internal combustion engine includes a common rail fuel system. The fuel injection unit of the invention is constructed of at least a high pressure fuel accumulator specific for the fuel injection unit, a flow fuse, a first fuel injection valve with a control valve, and a second fuel injection valve with a control valve. The first fuel injection valve is a smaller one used for injecting at most 30% of the fuel required in full load operation of a diesel mode. | 09-26-2013 |
20130340711 | Internal Combustion Engine - An internal combustion engine ( | 12-26-2013 |
20130340712 | Fuel Injection System - A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system. | 12-26-2013 |
20140000562 | FUEL INJECTION SYSTEM | 01-02-2014 |
20140007845 | Injector For A Fuel Supply System Of An Internal Combustion Engine And Fuel Supply System - An injector for a fuel supply system of an internal combustion engine, namely for a common rail fuel supply system of an internal combustion engine which is formed in particular as a large diesel internal combustion engine or ship's diesel internal combustion engine, having an injection nozzle, a control valve and a retaining body. The injection nozzle and the control valve form a clamped composite, and the composite formed of the injection nozzle and control valve can be mounted on the retaining body as a unit and disassembled from the retaining body as a unit. | 01-09-2014 |
20140026857 | FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE - A fuel supply device supplies fuel from a fuel tank to an injector by driving a diaphragm pump by use of pressure variation within a crankcase. The diaphragm pump includes: a pump casing; a diaphragm partitioning the interior of the pump casing into a negative pressure chamber and a pump chamber; and a plunger connected to the diaphragm and reciprocatively movable to and from the pump chamber. A pressure receiving area over which the plunger receives, at its end surface in a plunger advancing/retracting direction, pressure from the pump chamber is set smaller than a pressure receiving area over which the diaphragm receives pressure from the negative pressure chamber in the advancing/retracting direction. | 01-30-2014 |
20140083395 | IN-CYLINDER CHARGING SYSTEM FOR FUEL DELIVERY SYSTEMS AND METHODS - An air charging system includes a valve providing access to an engine cylinder, an accumulator coupled in flow communication with the valve, and a controller operable to open and close the valve until a threshold pressure condition is reached in the accumulator. Compressed gases stored in the accumulator are used in a fuel delivery system to prepare a charge of fuel that is delivered to an engine. | 03-27-2014 |
20140165965 | FUEL SUPPLY SYSTEM WITH ACCUMULATOR - A fuel supply system with an accumulator that allows for the accumulation of fuel at a pressure greater than the nominal operating pressure of the fuel supply system. The accumulation of fuel allows for less frequent fuel pump operation and therefore a reduction in overall fuel consumption of an engine. | 06-19-2014 |
20140202431 | FUEL INJECTION APPARATUS - A control unit obtains approximation straight lines before and during the fuel injection with respect to a first injection and a second injection among multiple fuel injections based on a pressure variation in the fuel accumulator which is sampled by the pressure sensor. The control unit employs data of which correlation coefficient is higher among a pilot injection and a main injection and obtains a hypothetical injection-start point accurately. Based on the variation amount of the hypothetical injection start delay which is obtained from the hypothetical injection-start point, an energization-start timing and the target-energization period are corrected. | 07-24-2014 |
20140216408 | FUEL SUPPLY APPARATUS - In the start mode of a fuel supply apparatus, a subtraction value of an electric power is obtained in view of an SCV characteristic. Furthermore, a common correction value is employed as the subtraction value in order to increase an actual fuel discharge amount when the internal combustion engine is started, whereby a fuel pressure in an accumulator agrees with the target value even if an individual pump unit shows a lowest limit in the variations of the discharge amount. The common correction value is shared among the individual pump units. Even if a starting characteristic is not acquired for each of the individual supply pumps, the internal combustion engine can reliably be started. | 08-07-2014 |
20140299103 | FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A fuel injection control device includes a fuel injection control unit and a pump control unit. The fuel injection control unit controls a fuel injection amount of a fuel injection valve. The pump control unit calculates a pump control amount based on feedforward and feedback terms and controls a fuel pump based on the pump control amount. The fuel injection control unit includes a first injection control unit for performing fuel injection by the valve at a starting injection amount in a starting period after commencement of starting of an engine by its starting unit until a predetermined rotation increase of the engine is produced in association with fuel combustion. The pump control unit includes a starting control unit for calculating the feedforward term based on the starting injection amount in the starting period and for calculating the pump control amount using this feedforward term. | 10-09-2014 |
20140366843 | ARRANGEMENT AND METHOD FOR ESTIMATING A FUEL MIXTURE'S CONTENT OF A SUPPLEMENTARY FUEL - An arrangement and a method for estimating a fuel mixture's content of a supplementary fuel. A combustion engine ( | 12-18-2014 |
20150047612 | METHOD AND SYSTEMS FOR A LEAKAGE PASSAGEWAY OF A FUEL INJECTOR - Various methods and systems are provided for a leakage passageway for a fuel injector of a common rail fuel system. In one embodiment, a fuel injector for an engine comprises an injector accumulator, an injector flow limiter valve configured to control a flow of fuel from a common fuel rail and into the injector accumulator, and a leakage passageway coupled between the injector accumulator and an inlet of the injector flow limiter valve, the leakage passageway bypassing the injector flow limiter valve. | 02-19-2015 |
20150369189 | FUEL SUPPLY SYSTEM WITH ACCUMULATOR - A fuel supply system with an accumulator that allows for the accumulation of fuel at a pressure greater than the nominal operating pressure of the fuel supply system. The accumulation of fuel allows for less frequent fuel pump operation and therefore a reduction in overall fuel consumption of an engine. | 12-24-2015 |
20160010584 | PROCESSING SYSTEM AND METHOD FOR CALCULATING PRESSURE DECREASES DUE TO INJECTION EVENTS IN A HIGH-PRESSURE FUEL SYSTEM | 01-14-2016 |
20160108879 | METHOD AND DEVICE FOR OPERATION OF A HIGH PRESSURE FUEL PUMP - In a high pressure pump in a system for fuel injection in a combustion engine, determining whether a predetermined partial load operating condition prevails in the combustion engine, at which one single of several pump elements ( | 04-21-2016 |
20160138545 | SYSTEM AND METHOD FOR ESTIMATING HIGH-PRESSURE FUEL LEAKAGE IN A COMMON RAIL FUEL SYSTEM - A system and method for measuring fuel pressure decreases in a fuel accumulator of an internal combustion engine is provided. The system includes the ability to stop a fuel flow to a fuel accumulator of the engine. Pressure signals are transmitted to a control system of the engine until the fuel pressure in the fuel accumulator drops by a predetermined amount, at which time fuel flow is re-enabled. The pressure signals are then analyzed to determine the amount or quantity of fuel delivered by each fuel injector. The system and method maintain engine and emissions performance by limiting the amount of fuel pressure decrease in the fuel accumulator. | 05-19-2016 |
20160146144 | SYSTEM AND METHOD FOR ESTIMATING HIGH-PRESSURE FUEL LEAKAGE IN A COMMON RAIL FUEL SYSTEM - A system and method for measuring fuel pressure decreases in a fuel accumulator of an internal combustion engine is provided. The system includes the ability to stop a fuel flow to a fuel accumulator of the engine. Pressure signals are transmitted to a control system of the engine until the fuel pressure in the fuel accumulator drops by a predetermined amount, at which time fuel flow is re-enabled. The pressure signals are then analyzed to determine the amount or quantity of fuel delivered by each fuel injector. The system and method maintain engine and emissions performance by limiting the amount of fuel pressure decrease in the fuel accumulator. | 05-26-2016 |
20160153389 | SYSTEM AND METHOD FOR FUEL INJECTOR ON-TIME CALCULATION USING FUEL SYSTEM PRESSURE PREDICTION | 06-02-2016 |
20180023502 | INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE HAVING SUCH AN INJECTION SYSTEM | 01-25-2018 |