| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123311000 | FOUR-CYCLE | 24 |
| 20090205608 | Four Stroke Internal Combustion Engine - A four stroke internal combustion engine has a gas reserving chamber | 08-20-2009 |
| 20090320791 | Four-Stroke Engine - A four-stroke engine includes a case which is comprised of a first case half and a second case half connected with each other at a parting plane which goes through centerline of a crankshaft and is perpendicular to centerline of a cylinder. A first bearing seat is divided into a first upper bearing seat half and a first lower bearing seat at the parting plane. A second bearing seat is divided into a second upper bearing seat half and a second upper bearing seat half at the parting plane. The first upper bearing scat half and the second upper bearing scat half are integrally molded on the first case half, and the first lower bearing seat half and the second lower bearing seat half are integrally molded on the second case half. An outer side surface of the first case half and a side cover form a valve-operating chamber for accommodating a valve-operating mechanism. | 12-31-2009 |
| 20110126799 | METHODS FOR CONTROLLING VALVES OF AN INTERNAL COMBUSTION ENGINE, DEVICES FOR CONTROLLING THE VALVES, AND ENGINES EMPLOYING THE METHODS - Methods for improving the efficiency of internal combustion engines are disclosed. In one embodiment, a method of improving the efficiency of an internal combustion engine comprises controlling the motion of an exhaust valve associated with a cylinder of the internal combustion engine. Camshafts and internal combustion engines configured for performing methods of the instant invention are also disclosed. | 06-02-2011 |
| 20110197852 | Heat engine cycle and internal combustion engine for the same - The heat engine cycle for four-stroke and six-stroke engines essentially increasing their efficiency, stipulates cessation of suction of a charge before a piston of the engine reaches bottom dead center during the suction stroke and ignited in proportionally decreased volume of combustion chamber. The central angle of a sector of the cams on which their lobes are located is decreased in the inventive engine. | 08-18-2011 |
| 20130074802 | Engine Lubrication Method - An engine lubrication method is provided. The four-cycle engine has an engine block having a cylindrical bore and an enclosed oil reservoir. A crankshaft is mounted in the engine block. An oil pump driven by the cam gear, brings the oil from the oil reservoir and the valve chamber. The engine is provided with a cylinder head assembly having a pair of overhead intake and exhaust valves. A circular arc wall surrounds the web of the crankshaft at a slight distance from the web. The crankshaft web causes the oil to fly to lubricate engine parts and the oil, returns into the oil reservoir by a check valve. Flowing of oil in to the combustion chamber when the engine is oriented to incline is prevented by oil recesses and long pipes. Another lubrication and breathing system without pump is presented, wherein construction except pump is basically followed. | 03-28-2013 |
| 20130087120 | RECIPROCATING PISTON ENGINE WITH IMPROVED MASS EQUALIZATION - The disclosure relates to reciprocating piston engines having four cylinders with a circular cross section, cylinder axes which are parallel to one another, and an output shaft. The cylinder axes, as viewed in axial section, lie at the corner points of a rectangle that is a square, with the output shaft, which extends parallel to the cylinder axes, in the centre of the square. Each pair of cylinders which lie diagonally opposite one another are arranged in the same direction, as viewed axially, and in opposite directions, as viewed axially, with respect to the other pair of cylinders. The force or moment from each cylinder is transmitted to the output shaft via a dedicated rotating crank and a toothing system. | 04-11-2013 |
| 20140014064 | DRIVE CONTROLLING APPARATUS AND DRIVE CONTROLLING METHOD - According to a drive controlling method, the engine is driven in the forward direction by a predetermined reference torque, and the position of the rotation angle of the engine driven in the forward direction is judged based on information concerning whether the rotation angle has passed through the first top dead center in the forward movement of the engine, the amount of forward movement of the engine driven in the forward direction and the amount of reverse movement of the engine driven in the reverse direction. | 01-16-2014 |
| 20160123220 | Four-Cycle Internal Combustion Engine with Curtailed Intake Process - A four-cycle naturally-aspirated internal combustion engine has a permanent curtailed intake process, which allows the temperature and pressure of intake air to the combustion cylinders to be tightly controlled, and enables a very small combustion chamber so that a much higher compression ratio and pre-ignition compression pressure can be achieved without approaching the air/fuel mixture auto-ignition threshold. The maximum threshold of curtailed intake volume is determined to be 68% of engine cylinder volume to achieve a compression ratio CR of 18 or higher. Because this design can effectively regulate and set the maximum pre-ignition temperature of the fuel-air mixture, it can combust virtually any type of liquid hydrocarbon fuel without knocking. This four-cycle engine, due to its higher compression ratio, generates power equivalent to or greater than a standard four-cycle engine in a smaller and lighter engine and at a much higher efficiency. | 05-05-2016 |
| 123312000 | Engine cylinder having a reciprocating sleeve valve | 1 |
| 20140102408 | MULTI-CYLINDER INTERNAL COMBUSTION ENGINE USING EXHAUST GASES TO INCREASE CYLINDER FILLING - Multi-cylinder internal combustion engine using exhaust gases to increase cylinder filling comprises cylinders ( | 04-17-2014 |
| 123315000 | Multiple exhaust | 1 |
| 20120279471 | SPARK IGNITION FOUR-STROKE CYCLE ENGINE - A second exhaust poppet valve | 11-08-2012 |
| 123316000 | Having subcharger associated with the cylinder | 2 |
| 20110023820 | PNEUMATIC HYBRID INTERNAL COMBUSTION ENGINE ON THE BASIS OF FIXED CAMSHAFTS - The present disclosure relates to an pneumatic hybrid internal combustion engine with at least one combustion chamber composed of a cylinder in which a piston is arranged mechanically interconnected to a crank shaft via a piston rod. An inlet valve and an exhaust valve are both mechanically interconnected via a valve gear to the crank shaft. The engine further includes at least one charge valve which is actuated by a charge valve actuator in a fully variable manner such that the engine can be operated in a four stroke hybrid mode. | 02-03-2011 |
| 20140076276 | APPARATUS FOR REDUCING PUMPING LOSS AND ENGINE INCLUDING THE SAME - An apparatus for reducing a pumping loss may include an auxiliary runner formed in an air-intake unit supplying air to a cylinder, wherein intake air may be temporarily stored in the auxiliary runner by using a flow of an exhaust gas during an exhaust stroke, and the intake air stored in the auxiliary runner may be supplied to the cylinder together with the air introduced to the air-intake unit during an intake stroke. | 03-20-2014 |
| 123317000 | Crankcase compression of air or combustible mixture to be subsequently pumped into the working cylinder | 1 |
| 20100050983 | FOUR-STROKE INTERNAL COMBUSTION ENGINE WITH NOVEL INTAKE AND EXHAUST STROKES - A four-stroke internal combustion engine includes a first intake manifold in communication with an intake port of a cylinder. A crankshaft chamber is in communication with a cylinder bore of the cylinder and includes an inlet port adjacent the cylinder bore. A second intake manifold is in communication with the crankshaft chamber for supplying air or gas into the cylinder bore via the inlet port during a second stage of an intake stroke of a piston. An exhaust port of the cylinder is opened during a second stage of a power stroke to perform a first-stage discharge of exhaust gas. Air or gas is supplied into the cylinder bore via the inlet port during a third stage of the power stroke to perform a second-stage discharge of the exhaust gas. Exhaust gas not discharged during the third stage of the power stroke is discharged during an exhaust stroke. | 03-04-2010 |
| 123318000 | Rear compression of air or combustible mixture to be subsequently pumped into the working cylinder | 1 |
| 20110271933 | FORCED INDUCTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A forced induction system for an internal combustion engine that includes at least one cylinder and at least one piston that is positioned in the cylinder. Valves are linked with the cylinder that allows ingress and egress of a fluid. At least one accumulation chamber is positioned external relative to the cylinder and accommodates fluid exiting an under piston volume. During a four-stroke combustion cycle of the engine, two charges of fluid from the under piston volume are introduced in an above piston volume during the intake stroke of the engine increasing an efficiency of the engine. | 11-10-2011 |
| 123076000 | Scavenging | 5 |
| 20110174248 | RESIDUAL BURNT GAS SCAVENGING METHOD IN A DIRECT-INJECTION SUPERCHARGED INTERNAL-COMBUSTION MULTI-CYLINDER ENGINE - The present invention relates to a method of scavenging the residual burnt gas of a direct-injection multi-cylinder internal-combustion engine ( | 07-21-2011 |
| 20110174249 | RESIDUAL BURNT GAS SCAVENGING METHOD IN A DIRECT-INJECTION SUPERCHARGED INTERNAL-COMBUSTION MULTI-CYLINDER ENGINE RUNNING UNDER PARTIAL LOADS - The present invention relates to a method of scavenging the residual burnt gas of a direct-injection supercharged multi-cylinder internal-combustion engine ( | 07-21-2011 |
| 20110297112 | Forced Air Valve Guide for an Internal Combustion Engine - Disclosed is a modified valve guide for a four-stroke internal combustion engine that utilizes compressed air to accelerate the outflow of exhaust gases from a combustion chamber and through the exhaust manifold. The device comprises a ported valve guide that is concentrically mounted about an exhaust valve stem. The valve guide is a hollow cylinder that surrounds the exhaust valve stem, and includes a vertically mounted port on its working end. Below the port is a circumferential ring and guide tube connection that accepts compressed air input, communicating forced air through the valve guide port on its working end into the combustion chamber and exhaust manifold. The introduction of forced air increases volumetric efficiency of the system by improving scavenging and forcibly removing exhaust gases from the cylinder during the exhaust stroke. Both the power and efficiency of the engine are improved, along with reduced emissions from the engine exhaust. | 12-08-2011 |
| 20120031356 | Direct Gas Injection System for Four Stroke Internal Combustion Engine - A method for operating a four-stroke internal combustion engine and a four-stroke combustion engine configured to be operated by the same are disclosed. The method comprises injecting compressed gas into a cylinder during the exhaust stroke of the combustion cycle. In another aspect of the invention, the injection occurs at a time in the combustion cycle near the end of the exhaust stroke, the cylinder approaching Top Dead Center. In a still further aspect of the invention, the gas comprises air. | 02-09-2012 |
| 20140069358 | CYLINDER LINER HAVING INTAKE PORTS FOR IMPROVED SCAVENGING - A cylinder liner for an engine is disclosed. The cylinder liner may have a hollow cylindrical sleeve extending from a first end to a second end along a longitudinal axis. The cylinder liner may also have a plurality of circumferentially spaced intake ports formed within the sleeve. The plurality of intake ports may have a first intake port positioned at a first axial distance from the first end. The plurality of intake ports may also have a second intake port positioned at a second axial distance from the first end. | 03-13-2014 |
| 123077000 | Single revolution | 1 |
| 20130014713 | DIFFERENTIAL-STROKE INTERNAL COMBUSTION ENGINE - An apparatus and method for a differential stroke combustion engine. The combustion engine including one or more two-part pistons, each two-part piston having a first piston part and a second piston part. The apparatus comprising: piston-lever element mechanically coupled to the second piston part; a plurality of cam-followers assemblies selectively coupleable with the piston-lever element for controlling operation of the second piston part; and wherein selective engagement of one or more cam-followers assemblies defines an operational mode of the second piston part. | 01-17-2013 |
| 123078000 | Variable clearance | 3 |
| 20080202486 | Hybrid Cycle Combustion Engine and Methods - An improved internal combustion engine of the four-stroke variable volume type operates by refraining from introducing substantial fuel into the working medium during the compression stroke until substantially maximum pressure of the working medium has been reached and utilizing at least one of the following processes: (a) causing combustion of fuel under substantially constant volume conditions; and (b) causing the power stroke to provide a larger volume to combustion products than the compression stroke provides to the working medium. Related methods are also provided. | 08-28-2008 |
| 20140216427 | ACCOMMODATING PISTON SEAT FOR DIFFERENTIAL-STROKE CYCLE ENGINES - A method of establishing and maintaining a piston compression height during portions of a combustion cycle in a differential-stroke cycle combustion engine, includes providing a piston seat cup coupled to said first piston part and a piston seat cover operatively associated with said piston seat cup and defining a sealed piston seat cavity, abutting said second piston part with said piston seat cover and moving said piston seat cover relative to said piston seat cup, aligning a fluid ingress aperture with a cooperating piston rod passage and piston pin inlet for a portion of said combustion cycle thereby allowing fluid to enter said piston seat cavity, and aligning a fluid egress aperture with a cooperating piston pin passage and piston rod outlet for a portion of said combustion cycle thereby allowing fluid to exit said piston seat cavity. | 08-07-2014 |
| 20120012090 | VARIABLE COMPRESSION RATIO APPARATUS - A variable compression ratio apparatus may include an external piston, a piston pin mounted in the external piston and a connecting rod, including an internal piston including a slot and sliding in an interior circumference of the external piston, wherein the piston pin passes through the internal piston and the external piston, a latching pin passing through the piston pin and selectively sliding therein, variable sliders disposed to selectively contact one of both ends of the latching pin, at both sides thereof to push the one of the both ends to the opposite side, and a support plate slidably supporting the variable sliders such that the variable sliders reciprocate perpendicular to length direction of the latching pin, wherein one end of a connecting arm selectively rotating may be connected to the variable slider and a sliding direction of the variable sliders may be controlled by rotation of the connecting arm. | 01-19-2012 |
| 123078000 | Varying means is in the piston | 2 |
| 20080202486 | Hybrid Cycle Combustion Engine and Methods - An improved internal combustion engine of the four-stroke variable volume type operates by refraining from introducing substantial fuel into the working medium during the compression stroke until substantially maximum pressure of the working medium has been reached and utilizing at least one of the following processes: (a) causing combustion of fuel under substantially constant volume conditions; and (b) causing the power stroke to provide a larger volume to combustion products than the compression stroke provides to the working medium. Related methods are also provided. | 08-28-2008 |
| 20140216427 | ACCOMMODATING PISTON SEAT FOR DIFFERENTIAL-STROKE CYCLE ENGINES - A method of establishing and maintaining a piston compression height during portions of a combustion cycle in a differential-stroke cycle combustion engine, includes providing a piston seat cup coupled to said first piston part and a piston seat cover operatively associated with said piston seat cup and defining a sealed piston seat cavity, abutting said second piston part with said piston seat cover and moving said piston seat cover relative to said piston seat cup, aligning a fluid ingress aperture with a cooperating piston rod passage and piston pin inlet for a portion of said combustion cycle thereby allowing fluid to enter said piston seat cavity, and aligning a fluid egress aperture with a cooperating piston pin passage and piston rod outlet for a portion of said combustion cycle thereby allowing fluid to exit said piston seat cavity. | 08-07-2014 |
| 20120012090 | VARIABLE COMPRESSION RATIO APPARATUS - A variable compression ratio apparatus may include an external piston, a piston pin mounted in the external piston and a connecting rod, including an internal piston including a slot and sliding in an interior circumference of the external piston, wherein the piston pin passes through the internal piston and the external piston, a latching pin passing through the piston pin and selectively sliding therein, variable sliders disposed to selectively contact one of both ends of the latching pin, at both sides thereof to push the one of the both ends to the opposite side, and a support plate slidably supporting the variable sliders such that the variable sliders reciprocate perpendicular to length direction of the latching pin, wherein one end of a connecting arm selectively rotating may be connected to the variable slider and a sliding direction of the variable sliders may be controlled by rotation of the connecting arm. | 01-19-2012 |
| 123078000 | Varying means is in the piston connection | 1 |
| 20080202486 | Hybrid Cycle Combustion Engine and Methods - An improved internal combustion engine of the four-stroke variable volume type operates by refraining from introducing substantial fuel into the working medium during the compression stroke until substantially maximum pressure of the working medium has been reached and utilizing at least one of the following processes: (a) causing combustion of fuel under substantially constant volume conditions; and (b) causing the power stroke to provide a larger volume to combustion products than the compression stroke provides to the working medium. Related methods are also provided. | 08-28-2008 |
| 20140216427 | ACCOMMODATING PISTON SEAT FOR DIFFERENTIAL-STROKE CYCLE ENGINES - A method of establishing and maintaining a piston compression height during portions of a combustion cycle in a differential-stroke cycle combustion engine, includes providing a piston seat cup coupled to said first piston part and a piston seat cover operatively associated with said piston seat cup and defining a sealed piston seat cavity, abutting said second piston part with said piston seat cover and moving said piston seat cover relative to said piston seat cup, aligning a fluid ingress aperture with a cooperating piston rod passage and piston pin inlet for a portion of said combustion cycle thereby allowing fluid to enter said piston seat cavity, and aligning a fluid egress aperture with a cooperating piston pin passage and piston rod outlet for a portion of said combustion cycle thereby allowing fluid to exit said piston seat cavity. | 08-07-2014 |
| 20120012090 | VARIABLE COMPRESSION RATIO APPARATUS - A variable compression ratio apparatus may include an external piston, a piston pin mounted in the external piston and a connecting rod, including an internal piston including a slot and sliding in an interior circumference of the external piston, wherein the piston pin passes through the internal piston and the external piston, a latching pin passing through the piston pin and selectively sliding therein, variable sliders disposed to selectively contact one of both ends of the latching pin, at both sides thereof to push the one of the both ends to the opposite side, and a support plate slidably supporting the variable sliders such that the variable sliders reciprocate perpendicular to length direction of the latching pin, wherein one end of a connecting arm selectively rotating may be connected to the variable slider and a sliding direction of the variable sliders may be controlled by rotation of the connecting arm. | 01-19-2012 |
| 123088000 | Transverse valve and lever | 1 |
| 20090095239 | VALVE APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A method includes operating an internal combustion engine according to a four-stroke combustion cycle. The four-stroke combustion cycle includes a combustion stroke, an exhaust stroke, an intake stroke and a compression stroke. A valve associated with a cylinder of the internal combustion engine is opened at a first time during the four-stroke combustion cycle. The valve is closed at a second time during the four-stroke combustion cycle. The valve is opened at a third time during the four-stroke combustion cycle. The valve is closed at a fourth time during the four-stroke combustion cycle. | 04-16-2009 |
