Class / Patent application number | Description | Number of patent applications / Date published |
123321000 |
Valve timing altering means (e.g., axially sliding cam shaft)
| 62 |
123323000 |
Exhaust throttling or blocking
| 29 |
123325000 |
Deceleration responsive cutoff of fuel to engine (e.g., pollution control) | 4 |
20080223334 | TORQUE BASED FUEL CUT-OFF - An engine control system is provided. The system includes: an engine torque module that estimates torque output based on charge energy; and a cylinder mode module that controls fuel cut-off and adjusts spark timing to the engine based on the torque output. | 09-18-2008 |
20120304960 | ROLLING NEUTRAL MODE CONTROL SYSTEMS AND METHODS - An engine control module includes a deceleration fuel cutoff (DFCO) module, an actuator control module, and a rolling neutral (RN) module. The DFCO module determines whether to disable provision of fuel to an engine when a vehicle speed is greater than zero and selectively generates a DFCO signal based on the determination. The actuator control module disables the provision of fuel to the engine when the DFCO signal is generated. The RN module selectively generates an RN mode signal in response to a determination that the DFCO module is not generating the DFCO signal. The actuator control module controls the provision of fuel to the engine based on a desired engine speed when the RN mode signal is generated. A transmission control module disengages first and second input clutches of a dual clutch transmission (DCT) to decouple the DCT from the engine when the RN mode signal is generated. | 12-06-2012 |
20140000556 | TRACTION CONTROL SYSTEM FOR VEHICLE | 01-02-2014 |
20150136076 | METHOD AND SYSTEM FOR IMPROVED DILUTION PURGING - Methods and systems are provided for expediting EGR purging in a hybrid vehicle during transient operations, such as tip-out to lower load conditions. In response to decreasing engine torque demand, engine fueling is disabled and a motor is used to spin the engine unfueled until a desired LP-EGR rate is achieved. Alternatively, engine operation is maintained with EGR disabled until the desired LP-EGR rate is achieved, and the excess engine torque generated is stored in a system battery. | 05-21-2015 |
123324000 |
Part of the air or combustible mixture to the engine cylinder omitted | 3 |
20140034010 | ENGINE BRAKING CONTROLLER - In one aspect of the invention, an engine is operated in a skip cylinder engine braking mode. In the skip cylinder engine braking mode, selected working cycles of selected working chambers are deactivated. Other selected working cycles of the selected working chambers are operated in a braking mode. Accordingly, individual working chambers are sometimes deactivated and sometimes operated in the braking mode while the engine is operating in the skip cylinder engine braking mode. Various methods for cylinder control are described, which improve fuel economy, catalytic converter performance, and vehicle NVH characteristics. | 02-06-2014 |
20140261310 | SYSTEM AND METHOD TO OPTIMIZE ENGINE BRAKING POWER - A system for optimizing engine braking power is provided. The system includes an intake manifold configured to receive air from a compressed air source. The system includes an engine brake associated with a power source. The system also includes a bleed valve configured to bleed a portion of the air from the intake manifold. The system further includes a controller in communication with the bleed valve and configured to receive a status of the engine brake. The controller is configured to activate the bleed valve to bleed a portion of the air from the intake manifold based at least in part on the engine brake being active and based at least in part on a pre-determined relationship between an air pressure in the intake manifold and one or more parameters associated with the power source. | 09-18-2014 |
20160123242 | Engine Braking - A method for enhancing engine brake horsepower. The method includes generating an engine brake horsepower by compressing air in a cylinder of an engine. Additionally, fuel is injected into the compressed air in the cylinder. The injected fuel is combusted in the compressed air in the cylinder prior to the piston reaching the top dead center position in the at least one cylinder. The compressed combustion products are also released before the piston passes the top dead center position. The combustion of the fuel during the engine braking event allows the engine braking to be a throttable event. Further, the quantity of fuel introduced into the cylinder for combustion may be adjusted so that the engine braking horsepower remains relatively consistent despite changes in engine speed. | 05-05-2016 |
123327000 |
Auxiliary air fed to the engine | 3 |
20100122687 | Method and Device for Increasing the Engine Brake Power of a Reciprocating Piston Internal Combustion Engine of a Vehicle, Particularly of a Diesel Engine - A method for increasing an engine brake power of an internal combustion engine, particularly of a diesel engine, having at least one cylinder with a reciprocating piston, at least one inlet valve and one outlet valve, and a turbocharger, in which air is compressed by an air compressor and stored in the at least one storage device, and air is injected in a clocked manner into the at least one cylinder in order to increase the compression work performed by the piston and thereby enhance the engine brake power during an engine braking process. | 05-20-2010 |
20130213350 | INTERNAL COMBUSTION ENGINE EXHAUST BRAKE CONTROL METHOD AND DEVICE - An internal combustion engine exhaust brake control method for increasing a braking force by increasing an exhaust pipe internal pressure when performing exhaust brake control by a vehicle in which an electric turbocharger is connected to an intake system of an engine. The method drives an electric turbocharger to increase a compressor rotation speed to a predetermined rotation speed and to increase an intake air amount when performing exhaust brake control by the vehicle in which the electric turbocharger is connected to the intake system of the engine. | 08-22-2013 |
20150136077 | CONTROL STRATEGY FOR ENGINE-OPERATED COMPRESSOR - An engine controller causes a propulsion engine of a motor vehicle to be fueled in a fueling mode of operation and not to be fueled in a non-fueling mode of operation. A controlled device, such as a clutch or regulator, controls operation of a pneumatic compressor which forces compressed air into a storage tank. The controlled device is controlled according to a strategy which distinguishes between the fueling mode and the non-fueling mode for improving overall vehicle fuel economy. | 05-21-2015 |
123329000 |
Having means to retard spark (e.g., ignition timing) | 1 |
20110226215 | ENGINE AND EXHAUST HEATING - A method for controlling a vehicle engine having a plurality of cylinders is provided. The method comprises: during engine idling, advancing spark timing of at least one cylinder to before a peak torque timing, and retarding spark timing from the advanced timing toward the peak torque timing in response to decreased engine speed to maintain idling speed. | 09-22-2011 |
Entries |
Document | Title | Date |
20090064965 | Leisure Vehicle - A leisure vehicle equipped with an internal combustion engine as a power unit to drive the leisure vehicle, including a drive wheel, a slip sensor unit configured to detect a slip of the drive wheel, a throttle device mounted to the internal combustion engine, a throttle valve position changing device configured to change a position of a throttle valve of the throttle device, a throttle close operation sensor unit configured to detect that a rider has performed a throttle close operation to close a throttle of the throttle device, and a controller configured to control an operation of the throttle valve position changing device. | 03-12-2009 |
20110277728 | CONTROL SYSTEM AND METHOD FOR IMPROVING ENGINE STOP-START RESPONSE TIME - A control system for an engine includes a stop-start initiation module and a load control module. The stop-start initiation module shuts down the engine in response to an engine shutdown request. The load control module, in response to the engine shutdown request, increases a rate at which a rotational speed of the engine decreases during engine shutdown by increasing a rotational load input to the engine by an engine accessory coupled to a crankshaft of the engine. A method for an engine includes shutting down the engine in response to an engine shutdown request. The method further includes increasing, in response to the engine shutdown request, a rate at which a rotational speed of the engine decreases during engine shutdown by increasing a rotational load input to the engine by an engine accessory coupled to a crankshaft of the engine. | 11-17-2011 |
20110297123 | BIAS SYSTEM FOR DEDICATED ENGINE BRAKING ROCKER ARM IN A LOST MOTION SYSTEM - A lost motion valve actuation system includes an engine brake housing and one or more hydraulic fluid supply passages extending through the housing. Master and slave pistons are slidably disposed corresponding bores in the housing. The master and slave pistons are used to provide selective actuation to one or more engine valves. An engine brake rocker arm disposed adjacent to the housing includes a master piston contact surface and a bias mechanism contact surface. A bias mechanism is disposed in the housing and includes a bias piston which extends from the housing. The bias piston biases the rocker arm out of contact with an engine cam during select engine operation modes, such as during a positive power mode of operation. The bias piston may be mechanically or hydraulically repositioned to permit the rocker arm to contact the engine cam during a second mode of engine operation, such as an engine braking mode. | 12-08-2011 |
20130047955 | RETARDING SYSTEM - A vehicle includes an engine, a transmission associated with the engine, and an engine retarder having a deactivated state and an activated state. The engine retarder is configured to provide a retarding torque to the engine in the activated state. The vehicle also includes a fan associated with the engine. The fan is configured to be activated in response to a selection of a transmission gear ratio greater than or equal to a threshold gear ratio while the engine retarder is in the activated state. The fan assists in providing additional retarding torque to the engine while activated. | 02-28-2013 |
20140209061 | ENGINE BRAKE IMPROVEMENT - A system and method for improving the engine braking capacity for a vehicle is disclosed. The system and method include providing a compression release braking system, providing an energy drawing component for increasing power draw on the vehicle engine, and, increasing the engine braking capability by synchronizing operation of the energy drawing component with operation of the compression release braking system. The energy drawing component includes a hydraulic fan, which is part of the cooling system of the vehicle. Increasing the speed of the fan draws energy from the engine, which in turn, increases the braking capability of the engine. | 07-31-2014 |
20140216398 | TURBOCHARGER OPERATION TO INCREASE BRAKE EFFECTIVENESS - In response to activation of a compression release brake when a motor vehicle having a turbocharged internal combustion engine is operating at some elevation above sea level and a turbocharger compressor is operating in a region of an operating map which is creating boost air in an engine intake manifold which would cause the compression release brake to decelerate the vehicle more slowly at that elevation than it would at sea level for the same operating conditions of the vehicle and engine other than altitude, the compression release brake decelerates the vehicle less slowly by operating a valve mechanism to reduce flow through a charge air cooler and increase flow through a charge air cooler by-pass. | 08-07-2014 |
20140261308 | VEHICLE AIR-CONDITIONING CONTROL APPARATUS - A vehicle air-conditioning control apparatus has: an air mix damper; an actuator for driving the air mix damper; a target opening degree determination device operable to determine a target opening degree of the air mix damper; a drive frequency reduction device operable, during automatic stop of an engine, to reduce a drive frequency of the actuator; a target opening degree correction device operable, during automatic stop of the engine and when a current target opening degree is greater than a previous target opening degree, to increase the current target opening degree, and, when the current target opening degree is less than the previous target opening degree, to reduce the current target opening degree; and a drive control device operable, during running of the engine, to control the actuator based on the target opening degree, and, during automatic stop of the engine, to control the actuator the corrected target opening degree. | 09-18-2014 |
20140261309 | ENGINE DIAGNOSTICS WITH SKIP FIRE CONTROL - Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine appropriate times to conduct selected diagnostics and/or to help better interpret sensor inputs or diagnostic results. In one aspect, selected diagnostics are executed when a single cylinder is fired a plurality of times in isolation relative to a sensor used in the diagnosis. In another aspect, selected diagnostics are conducted while the engine is operated using a firing sequence that insures that no cylinders in a first cylinder bank are fired for a plurality of engine cycles while cylinders in a second bank are at least sometimes fired. The described tests can be conducted opportunistically, when conditions are appropriate, or specific firing sequences can be commanded to achieve the desired isolation or skipping of one or more selected cylinders. | 09-18-2014 |
20150075490 | CONTROLLED ENGINE SHUTDOWN METHOD AND ENGINE SHUTDOWN PREDICTION FOR EXHAUST SYSTEM DURABILITY - A controlled engine shutdown method is disclosed that includes monitoring exhaust system temperature, monitoring operator shutdown commands, and delaying engine shutdown based on exhaust system temperature. The method can include inhibiting any process that affects exhaust temperatures, for example DPF regeneration. The method can use a shutdown timer, allow operator override of the shutdown delay, and display a delay notification message. The method can also include predicting when an engine shutdown is expected, and delaying or aborting any process that would affect exhaust temperatures when an engine shutdown is predicted. Predicting can include monitoring various machine states, determining an average activity interval for the machine, determining a geographic shutdown area, determining a shutdown time of day and/or monitoring a machine fluid level. | 03-19-2015 |
20150136074 | METHOD AND SYSTEM FOR IMPROVED DILUTION PURGING - Methods and systems are provided for expediting EGR purging in a hybrid vehicle during transient operations, such as tip-out to lower load conditions. In response to decreasing engine torque demand, engine fueling is disabled and a motor is used to spin the engine unfueled until a desired LP-EGR rate is achieved. Alternatively, engine operation is maintained with EGR disabled until the desired LP-EGR rate is achieved, and the excess engine torque generated is stored in a system battery. | 05-21-2015 |
20160090920 | CONTROLLER SELECTION OF ENGINE BRAKE ACTIVATION TYPE - Grade of road on which a motor vehicle travels and load imposed on the vehicle's engine are used to select one of two types of activation for an engine brake. | 03-31-2016 |