Abstract: An outboard motor is provided with an exhaust gas recirculation (EGR) system that provides a heat exchanger which reduces the temperature of the exhaust gas prior to introducing the exhaust gas to the cylinders of the engine. The heat exchanger can be integral to the engine, particularly the cylinder head of the engine, or it can be disposed outside the structure of the engine. When disposed outside the structure of the engine, the heat exchanger can comprise a tubular structure that causes exhaust gas and water, from the body of water, to flow in thermal communication with each other. Alternatively, the heat exchanger which is disposed outside the structure of the engine can use a cavity within the driveshaft housing as a heat exchanger with water being sprayed into the stream of exhaust gas as it passes from the engine to the cavity.

Abstract: The invention relates to a device for controlling an exhaust gas stream. Said device comprises a housing (1, 101) with at least a first, second and third connection (2, 3, 4, 102, 103, 104) that form links to a first, second and third exhaust gas conduit for conducting the exhaust gases of an internal combustion engine, a first sliding element (6, 106) with a displaceable first sliding rod (6a, 106a) and a first sealing member (6c, 106c) that is located on said rod, a second sliding element (7, 107) with a displaceable second sliding rod (7, 107a) and a second sealing member (7c, 107c) that is located on said rod and an actuator for a force-assisted actuation of the device. According to the invention, a link (4c, 104b) can be established between the first and the second connection and can be adjusted by means of the first sealing member (6, 106) and a link (3c, 103b) can be established and adjusted between the first and the third connection by means of the second sealing member (7c, 107c).

Abstract: An air breathing fuel consuming internal combustion engine with EGR and a control for the quantity of EGR. The total gas flow of the engine is calculated by measuring temperature and pressure at the intake to the engine. The fresh air flow is measured by an orifice or venturi at any point in the flow path for fresh air for combustion by the engine prior to the introduction of the EGR flow. The difference between the calculated total flow and fresh air flow is the actual EGR flow which is used to set the EGR relative to total flow according to one of a number of selected control algorithms.

Abstract: The present invention relates to a method for controlling autoignition of a fuel mixture, notably for a diesel type internal-combustion engine, according to which a fuel mixture is made in at least one combustion chamber (14) of the engine with a fuel and at least one fluid in order to obtain a homogeneous type combustion by autoignition. The method includes defining a desired combustion progress by autoignition of the fuel mixture, and adjusting the cetane number of the fuel used for the mixture to that of the fuel providing the desired combustion progress is obtained.

Abstract: An engine control, and in particular a method for controlling an engine including a low-pressure exhaust gas recycling loop. The method adjusts a predetermined engine operating parameter by controlling the position of an exhaust gas recycling valve, which is placed in the loop, for determining whether the predetermined measured quantity of the valve respects a predetermined criteria, and controls the position of an exhaust shutter, which is arranged outside the loop, when the quantity does not respect the criteria.

Abstract: An object of the present invention is to provide a technology that enables to enhance the effect of decreasing the NOx emission achieved by an exhaust gas purification system as a whole while favorably achieving both reduction in the amount of NOx generated in an internal combustion engine by means of EGR and reduction reaction of NOx in an NOx catalyst even when a reduction process for the NOx catalyst is performed while EGR is being performed. In the invention, in the case where addition of fuel into an exhaust pipe from a fuel addition valve 28 is performed to carry out the reduction process for the NOx catalyst 20 when EGR is being performed mainly by means of a low pressure EGR passage 23, the amount of the exhaust gas passing through the NOx catalyst 20 is decreased by decreasing the amount of the exhaust gas recirculated by the low pressure EGR passage 23.

Abstract: An exhaust gas recirculation cooler may include a housing and a first wall. The housing may include an exhaust gas region, a coolant region, an exhaust gas inlet, and an exhaust gas outlet. The first wall may be fixed within the housing and may separate the exhaust gas region from the coolant region. The first wall may include a first region facing the exhaust gas region and a first tab having a fixed end coupled to the first region and a free end generally opposite the fixed end. The free end may be displaceable between first and second positions based on an operating temperature of the exhaust gas. The free end may be displaced in a direction generally perpendicular to the first region when in the second position.

Abstract: An engine provided with a fuel injector for directly injecting fuel into a cylinder, a spark plug positioning a spark gap in a flight path of fuel injected from the fuel injector, and a cavity formed in a piston top face, wherein at the time of stratified combustion, the fuel injector injects substantially all of the fuel in a direction merging with a tumble flow, swirling in a longitudinal direction along the cavity at the compression stroke, along the swirl direction of the tumble flow and uses the spark plug to ignite the fuel while the fuel at the end period of injection is passing through the spark gap.

Abstract: A controller moves a solenoid operated valve with a first solenoid operating pulse during a travel time. After a time interval, the controller applies a second pulse, which moves the valve towards its original position. The time interval may be varied, and a characteristic indicative of the return of the valve to the original position may be detected based on a comparison of the pulses.

Abstract: A method of operating an engine for a vehicle having at least a first cylinder, the method comprising of operating the first cylinder to provide at least one of compression braking and expansion braking by holding one of an intake valve and an exhaust valve of the first cylinder closed while opening, closing, and opening the other of the intake valve and the exhaust valve during a cycle of the first cylinder and during a first vacuum level of an intake manifold upstream of the first cylinder; and operating the first cylinder to provide at least one of compression braking and expansion braking by operating both the intake valve and the exhaust valve of the first cylinder during a cycle of the first cylinder to allow at least some air to flow through the first cylinder during a second vacuum level of the intake manifold.

Abstract: A cooling water circulation system (100) is configured so that cooling water is delivered from a water pump (113) toward a cylinder head (111) via a pump delivery pipe (114). Further, the system (100) is configured so that an engine block cooling switching section (170) changes the supply of the cooling water from the cylinder head (111) to a cylinder block (112) in accordance with a cooling water temperature. An EGR cooler branch pipe (151), which branches off from the pump delivery pipe (114), is connected to an EGR cooler (150). The EGR cooler branch pipe (151) is provided with an EGR cooler cooling switching valve (153) that opens or closes in accordance with an operating state.

Abstract: A fuel injection control system in which an appropriate command is obtained both before and after learning a correction amount. Command storage means 3 stores a command for pre-learning and a command for post-learning; the command for pre-learning is a command for a pre-learning time, which is a time before correction amount learning means 5 learns a correction amount, and a command for post-learning for a post-learning time, which is a time after the correction amount learning means 5 learns a correction amount; command injection amount determination means 4 refers to the command for pre-learning at the pre-learning time, and refers to the command for post-learning at the post-learning time.

Abstract: A system and a method is disclosed for universal operation of an internal-combustion engine (2), comprising at least an actuator connected to a working device of the engine, an electronic card (3) including a recording medium for a programmable logic FPGA component and a card synchronization component (9, 10) for synchronizing the card according to the engine cycle. The method, generates, in the component, an angular reference point in the engine cycle for each cylinder; generates, through the component, actuator control pulses, the pulses being parameterizable in phase and in duration, independent and linked with a single cylinder, performing multiplexing of the pulses to distribute the pulses over at least one of the physical outputs of the card specific to the cylinder considered; and controlling at least one of the actuators linked with one of the physical outputs of the card specific to the cylinder considered, with at least one of the control pulses.

Abstract: In a method for changing the operating mode in an internal combustion engine it is possible to switch between an operating mode with spark ignition of the engine and an operating mode with auto-ignition of the engine. Hereby, a first map is provided in which at least one range is specified in which a suitable auto-ignition of the engine can take place. After the engine start, therefore, it is determined whether the engine has reached an operating point lying within this range of the first map in order then to switch the engine to the operating mode in which auto-ignition can take place reliably.

Abstract: An exhaust gas recirculation (EGR) system communicates hot exhaust gases from an exhaust manifold to an intake manifold through a first passage and a second passage parallel with the first passage. A first EGR valve assembly controls exhaust gas flow through the first passage and a second EGR valve assembly controls exhaust gas flow through the second passage. Exhaust gas is selectively flowed through one or both of the first and second passages to provide the desired temperature and flow through the intake manifold to the engine.

Abstract: System and method for modifying the operation of an engine comprising an engine control unit coupled to the engine, a command module coupled to the engine control unit, wherein the command module is operable to modify operating characteristics of the engine by reconfiguring the function of the engine control unit. The engine control unit further comprises software and/or firmware, and the command module reconfigures the function of the engine control unit by altering the software and/or firmware. The command module may modify the engine operation, for example, based upon environmental conditions, topographic conditions, and/or traffic conditions.

Abstract: In an automobile fuel control system having an EGO sensor which sends voltage to an ECM in order to adjust fuel/air ratio, the EGO sensor being disabled and replaced with a substitute signal generator circuit which stimulates the ECM toward lean-running.

Abstract: An engine control unit for controlling an automobile engine, which is equipped with a booster circuit for boosting the voltage of battery power source, an injector driving circuit for driving an injector by making use of a boosted high voltage, and a microcomputer for controlling the engine; wherein the engine control unit is featured in that an LC module mounted with a booster coil constituting the booster circuit and with an electrolytic capacitor, a power module mounted with a rectifying device constituting the booster circuit and the injector driving circuit and with a switching device, and a control circuit board mounted with the microcomputer and with a connector acting as an interface for an external member of the engine control unit are laminated each other.

Abstract: During lean combustion, an ECU as a control device for a diesel engine calculates a ratio between a target A/F value and a detected A/F value detected by a A/F sensor, wherein the target A/F value is a ratio between a target air volume and a target injection amount in order to obtain a request torque. The ECU calculates the air volume after compensation during rich combustion by multiplying the target air volume with the compensation gain value. The ECU instructs an air intake throttle valve and an EGR valve to regulate those opening degrees according to the calculation result in order to decrease a torque difference between the lean combustion and the rich combustion.

Abstract: An internal combustion engine having a plurality of banks; each having a cylinder provided to said banks comprising: an intake valve provided between said cylinder and an intake manifold a camshaft opening and closing said intake valve by means of mechanical power of said internal combustion engine; and a changing unit changing, according to an operating state of said internal combustion engine a phase angle of said camshaft said phase angle corresponding to a closing timing of said intake valve said banks differing from each other in most retarded phase angle changed by said changing unit.