Abstract: A misfire detection device for an engine having cylinders includes: a crank angle detector that detects an angular position of a crankshaft; a rotational speed calculator that calculates a rotational speed of the crankshaft on the basis of an output from the crank angle detector; and a misfire detector that obtains a difference between a rotational speed of the crankshaft in a combustion process in a diagnosis target cylinder and a rotational speed of the crankshaft in a combustion process in a last cylinder whose ignition order is immediately before the diagnosis target cylinder, and carries out a misfire detection by using a diagnostic value set on the basis of the difference.

Abstract: The invention provides a cylinder head gasket installed by being sandwiched between a cylinder block and a cylinder head of an internal combustion engine. The cylinder head gasket has bore holes each having a circular plane at positions which are lapped over a combustion chamber in said cylinder block, and surface pressure generation portions constructed by three-dimensional shapes surrounding said bore holes at positions which are lapped over partition walls between the combustion chamber in said cylinder block and a water jacket portion. The surface pressure generation portions are arranged at fixed positions in a thickness direction of said partition wall and are arranged closer to the combustion chamber side or the water jacket portion side than the fixed positions in the thickness direction of said partition wall partly on a circumference around the bore holes. Therefore, bore deformation can be reduced.

Abstract: A control unit for controlling a phase angle of a first camshaft of an internal combustion engine includes a first characteristic diagram signal generator for determining a dynamic setpoint phase angle of the first camshaft, a second characteristic diagram signal generator for determining a static setpoint phase angle of the first camshaft, and a first interpolator for determining a corrected setpoint phase angle of the first camshaft based on the dynamic setpoint phase angle of the first camshaft and on the static setpoint phase angle of the first camshaft. A motor vehicle including a control unit for controlling a phase angle of a first camshaft of an internal combustion engine and a method for controlling a phase angle of a first camshaft of an internal combustion engine are also provided.

Abstract: This piston includes a piston main body made of aluminum or an aluminum alloy, used in an internal combustion and a modified layer formed on a surface of a strength reinforced portion of the piston main body, having a surface made of aluminum oxide by plasma oxidation, to which compressive residual stress is applied.

Abstract: Methods and systems are provided for operating a lift pump of an engine fuel system. In one example, a method may comprise predicting when a fuel rail pressure will decrease below a threshold assuming that a lift pump remains off. The method may further comprise powering on the lift pump before the fuel rail pressure decreases below to the threshold to prevent fuel rail pressure from decreasing below the threshold.

Abstract: Methods and system are provided for operating a fuel system of a stop-start engine system. In one example a method may comprise powering off a lift pump and maintaining a volume control valve in a closed position during an engine stop to maintain a fuel pressure within a fuel rail and one or more fuel injectors. The method may further comprise, in response to determining an engine start is desired, powering on the lift pump, initiating cylinder combustion, and operating a higher pressure pump (HPP) in an unpressurized mode when a fuel pressure upstream of the HPP is less than a threshold and switching to operating the HPP in a pressurized mode when the fuel pressure upstream of the HPP reaches the threshold.

Abstract: A heat shield film is formed on a bottom surface of a cylinder head and a heat shield film is formed on an inner peripheral surface of a small diameter hole portion. The film is a thermal spraying film made from the same film material. Since the film is thicker than the film, the film has higher thermal capacity than the film and thus heat retaining effect of the film is higher than that of the film. Therefore, combustion gas generated in a combustion chamber is suppressed to lose its momentum around the portion. Even if the combustion gas goes off around the portion, excessive temperature decrease of the combustion gas in the portion is suppressed.

Abstract: A piston for a cylinder of a combustion engine includes piston crown including a piston bowl formed by an upwardly facing cavity, the piston bowl including a floor section with a central, and a side section, the side section connecting the inner section with an upper surface of the piston crown, wherein the side section is formed with mutually spaced apart ridges protruding towards the apex, and wherein the side section having at least one recess at an upper end of the side section connecting the side section with the upper surface of the piston crown.

Abstract: A marine propulsion device includes an internal combustion engine driving a driveshaft into rotation and a starter-generator motor in a torque transmitting relationship with the driveshaft. The starter-generator motor is alternately operable in a positive torque mode where it is powered by a battery to exert a positive torque on the driveshaft, and in a negative torque mode where it exerts a negative torque on the driveshaft and generates a charge to the battery. A control module is configured to receive an engine RPM, determine an engine RPM drop rate, and determine that the engine RPM drop rate exceeds a threshold drop rate. The starter-generator motor is then operated in a positive torque mode based on the engine RPM drop rate when the engine RPM drop rate exceeds the threshold drop rate.

Abstract: An internal combustion engine including a first set of cylinders includes: a first two-stroke compression cylinder housing a first compression piston connected to a first crank shaft; a first four-stroke combustion cylinder housing a first combustion piston connected to a second crank shaft, the first four-stroke combustion cylinder being configured to receive compressed gas from the first two-stroke compression cylinder; and a first two-stroke expansion cylinder housing a first expansion piston connected to the first crank shaft, the first two-stroke expansion cylinder being configured to receive exhaust gas from the first four-stroke combustion cylinder, wherein the first compression piston is positioned to reach a lower end position within the first compression cylinder and the first expansion piston is positioned to reach an upper end position within the first expansion cylinder when the first combustion piston reaches a lower end position within the first combustion cylinder; wherein the second crank sha

Abstract: Methods and systems are provided for a vapor canister couple to a fuel tank of a vehicle. A series of fluidically coupled, variable capacity bleed elements, externally coupled to a sidewall of the vapor canister, capture the bleed emissions resulting from desorption of fuel vapors from an adsorbent material inside the vapor canister. The series of bleed elements may be fluidically coupled through flow paths passing through the vapor canister wall, connecting through a first flow path to a chamber inside the vapor canister and connecting through a second flow path to a vent port of the vapor canister.

Abstract: An engine starting system includes an electronic control unit configured to: automatically stop an engine in response to an engine stop request, and restart the engine in response to an engine restart request; calculate, in the course of automatically stopping the engine, a throttle opening degree based on at least one of a vehicle speed or an input rotational speed of a transmission, such that the throttle opening degree when the at least one of the vehicle speed or the input rotational speed is high is larger than the throttle opening degree when the at least one of the vehicle speed or the input rotational speed is low; carry out scavenging of each cylinder by opening a throttle valve to the calculated throttle opening degree in the course of automatically stopping the engine; and restart the engine through ignition-based engine starting in response to the engine restart request.

Abstract: Provide is a PCV valve which can be quickly defreezed and provides a favorable sealing to the heater against the blow-by gas. The PCV valve (2) comprises a housing (6) defining a flow passage (4) for blow-by gas, a valve member (30) positioned in the flow passage to cooperate with a valve seat (18) formed in the housing, a spring (38) biasing the valve member toward the valve seat, a heat transmission member (40) including a heat dissipating part (42) surrounding the valve member, and a heating unit (52) including a heating element (66) for heating the heat transmission member, the heating element being separated from the flow passage in an air tight manner.

Abstract: A control apparatus for an internal combustion engine is provided which works to control an electric motor to start the engine through a belt transmission system. The control apparatus restricts rotation of the electric motor so as to keep a speed of the electric motor below a speed at which the electric motor is capable of producing a maximum torque until a given period of time passes since the electric motor is actuated to start in the motor mode. This enables the electric motor to generate the maximum torque when it is required to crank the engine.

Abstract: The invention relates to an exhaust gas heat exchanger for transferring heat between the exhaust gas of a combustion engine of a motor vehicle and a coolant. The exhaust gas heat exchanger has a housing with connections for supplying and discharging coolant. According to the invention, one connection is formed by a pipe section which has a joining surface, formed on the outer circumference thereof, for fixing on the housing of the exhaust gas heat exchanger and a transfer opening, which is aligned transversely to the longitudinal axis (LA) of the pipe section and communicates with a passage opening in the housing.

Abstract: A fuel vapor recovery apparatus includes an adsorbent canister capable of capturing fuel vapor, a vapor passage connecting the adsorbent canister to a fuel tank. In addition, the apparatus includes an atmospheric air passage communicating the adsorbent canister with the atmosphere, a purge passage coupling the adsorbent canister to an intake pipe of an internal combustion engine, a purge pump configured to generate a gas flow from the adsorbent canister to the intake pipe through the purge passage, and a flow control valve provided at the purge passage downstream of the purge pump in a direction of the gas flow and configured to regulate the gas flow through the purge passage. Further, the apparatus includes a decompressor configured to decrease pressure upstream of the flow control valve when the pressure upstream of the flow control valve in the direction of the gas flow is higher than the atmospheric pressure.

Abstract: A remote engine starting system includes a portable terminal that is carried by a user and a vehicle that allows an engine to be started in response to receiving an engine start signal transmitted from the portable terminal. The vehicle periodically transmits a query signal for establishment of a wireless communication link with the portable terminal to a predetermined range surrounding the vehicle to define a predetermined wireless communication area of the vehicle. A control unit of the portable terminal determines, based on whether the wireless communication link with the vehicle is established, whether the portable terminal is within the wireless communication area. The control unit transmits an engine start signal when the portable terminal enters the wireless communication area surrounding the vehicle while automatic start setting is enabled by the user.

Abstract: According to the present invention, there is provided a secondary engine cover formed from a polymeric material comprising a wear indicator, wherein the wear indicator comprises a region of reduced thickness of polymeric material and wherein the region of reduced thickness comprises a blind hole.

Abstract: Methods and systems are provided for conducting an engine-off natural vacuum test and filtering the output of the engine-off natural vacuum (EONV) test based on a variable weighting factor. In one example, one or more EONV test entry conditions are evaluated with one or more membership functions corresponding to the indicated result of the EONV test to obtain an overall confidence value that is used to modify the weighting factor. In this way, the filtered EONV output reflects the confidence in the test results, and as such a malfunction indicator light may be more appropriately set as compared to conditions wherein filtered EONV output is not based on confidence in the test results.

Abstract: A fuel injection device including an injector that injects fuel into a cylinder of an engine; a fuel injection amount obtaining unit that obtains a fuel injection amount of fuel injected by the injector; a heat generation amount obtaining unit that obtains a heat generation amount of the fuel injected by the injector and ignited; and a control unit that determines that injector abnormality occurs, when determining that a difference between a fuel injection amount obtained by the fuel injection amount obtaining unit and a reference fuel injection amount is within a predetermined range and that a heat generation amount obtained by the heat generation amount obtaining unit is greater than a reference heat generation amount corresponding to the reference fuel injection amount. Accordingly, whether or not injection hole corrosion occurs in the injector can be determined.