Abstract: A seat belt retractor is formed of a reel for a seat belt having a rotary shaft with an end, a bearing for rotationally supporting the end of the rotary shaft, and a rotary shaft end support formed in the bearing. The end of the rotary shaft has a curved surface, and the rotary shaft end support has an opposing surface opposing the end of the rotary shaft for supporting the end of the rotary shaft. The opposing surface has a curved surface corresponding to that of the end of the rotary shaft to thereby properly support the rotary shaft without wobbling.

Abstract: In order to securely prevent knocks from occurring upon starting and the like, while enhancing the compression ratio in a spark ignition type in-cylinder injection internal combustion engine which includes a fuel injection valve for directly injecting fuel into a combustion chamber, fuel is injected during a compression stroke in a specific operation region under an intermediate to high load to perform stratified combustion. Further provided is a control unit for driving and controlling the fuel injection valve such that, in the stratified combustion, prior to the fuel injection during the compression stroke, fuel is injected from the fuel injection valve during an intake stroke by such an amount that fuel fails to self-ignite.

Abstract: An intake system construction for an internal combustion engine includes a combustion chamber formed with upper and lower extremities thereof defined by a lower wall of a cylinder head and a top wall of a piston, an intake open end formed in the lower wall in opposition to the combustion chamber on one side of a reference plane which contains a central axis of the cylinder, an intake port formed in communication with the combustion chamber via the intake open end and extending upwardly from the intake open end so that a vertical swirl of inducted air is formed in the combustion chamber, an intake valve having a head portion for opening or closing the intake open end and a stem portion extending from the head portion to an upstream side of the intake port through the cylinder head, and a straightening member arranged in the intake port on a downstream side of the stem portion so that an inducted air flow is straightened on the downstream side of the stem portion.

Abstract: A control apparatus for an in-cylinder injection type internal combustion engine includes an electronic control unit and an induction control system for changing the flow of air in the induction system of the engine. The electronic control unit selects one of fuel injection modes including a compression-stroke injection mode and an intake-stroke injection mode in accordance with the engine operating state. When the engine is operated in the compression-stroke injection mode, the electronic control unit controls the induction control system so as to enhance a stratified degree of an intake air flow generated in the combustion chamber of the engine, to thereby stabilize a combustion, especially, in the compression-stroke injection mode, whereby the fuel efficiency and the engine output are improved.

Abstract: This invention relates to a fuel feeding system for an internal combustion engine, which is suited for use in an in-cylinder injection internal combustion engine. In a system provided with a control valve so that a fuel pressure can be changed over for an adjustment, it is an object of the present invention to permit good combustion in the engine even when the control valve becomes inoperative.

Abstract: An intake system construction according to the present invention for an internal combustion engine is provided with a combustion chamber formed with upper and lower extremities thereof defined by a cylinder head and a piston, an intake open end arranged for being opened or closed by an intake valve, an exhaust open end arranged for being opened or closed by an exhaust valve, an intake port formed extending upwardly from the intake open end so that a vertical swirl of inducted air is formed in the combustion chamber, and an exhaust port for discharging combustion gas from the combustion chamber. The intake port is formed wider in one of halves thereof located adjacent a reference plane, which contains a central axis of a cylinder, than in the other half thereof located remote from the reference plane.

Abstract: An intake system construction according to the present invention for an internal combustion engine is provided with a combustion chamber formed with upper and lower extremities thereof defined by a cylinder head and a piston, an intake open end arranged for being opened or closed by an intake valve, an exhaust open end arranged for being opened or closed by an exhaust valve, an intake port formed extending upwardly from the intake open end so that a vertical swirl of inducted air is formed in the combustion chamber, and an exhaust port for discharging combustion gas from the combustion chamber. The intake port is formed wider in one of halves thereof located adjacent a reference plane, which contains a central axis of a cylinder, than in the other half thereof located remote from the reference plane.

Abstract: A control apparatus for an in-cylinder injection type internal combustion engine includes an electronic control unit and an induction control system for changing the effective length of an intake passage of an induction system of the engine. The electronic control unit selects one of fuel injection modes including a compression-stroke injection mode and an intake-stroke injection mode in accordance with the engine operating state. When the engine is operated in a low engine-speed zone of a compression-stroke injection region, the electronic control unit controls the induction control system so as to make the effective length of the intake passage shorter than that for other engine operating region, to thereby attain a stable combustion, improved fuel efficiency and improved engine output in any fuel injection mode.

Abstract: This invention relates to an in-cylinder injection internal combustion engine. A lower wall of a cylinder head, said lower wall defining an upper wall of a combustion chamber, is configured in the form of a pentroof composed of an intake-valve-side, tilted, lower wall and an exhaust-valve-side, tilted, lower wall. A spark plug is arranged in the vicinity of a top part of the pentroof-shaped upper wall of the combustion chamber. A top wall of a piston, said top wall forming a lower wall of the combustion chamber, is configured in the form of a pentroof having an intake-valve-side, tilted, top wall and an exhaust-valve-side, tilted, top wall formed so that they correspond the intake-valve-side, tilted, lower wall and the exhaust-valve-side, tilted, lower wall of the cylinder head. A recessed portion is arranged in the intake-valve-side, tilted, top wall in the top wall of the piston.

Abstract: This invention relates to a fuel injection control system for an in-cylinder injection internal combustion engine. The system is provided with a fuel injection valve (1) arranged at a cylinder for injecting fuel into the cylinder, fuel feed pressure setting unit (121) for setting a fuel injection pressure of the fuel injection valve (1) at a low pressure in a specific operation state including a start-up of the internal combustion engine and for setting said fuel injection pressure at a high pressure in an operation state other than the specific operation state, and fuel injection controller (120) for setting an injection period of the fuel injection valve (1) as a period longer than a period of a single stroke in an operation cycle of the internal combustion engine in the specific operation state.

Abstract: In a swash plate type axial piston pump, a swash plate 23 is fixed and supported in a cabinet while being inclined with respect to the center axial line of a rotary shaft 3. A cylinder block 15 having a plurality of cylinders 13 is attached to the rotary shaft 3 so that the cylinder block 15 slides of the rotary shaft 3 in the axial direction thereof and is rotated integrally therewith. Each one end of a plurality of pistons 21 is slidingly engaged with the cylinder 13 and the other end thereof is abutted against the swash plate 23 through a shoe 25. A valve plate 31 having a suction port 33 and a discharge port 35 is disposed so as to be abutted against the inner surface of the cabinet 1 and the bottom the cylinder block 15 so that a suction path 39 and a discharge path 41 in the cabinet 1 are selectively communicated with a pump chamber 14 in each cylinder through the suction port 33 and the discharge port 35.

Abstract: An internal combustion engine includes a cylinder head having a pair of upright intake ports formed therein on opposite sides of a plug hole extending along a cylinder axis, and each intake port has an upstream-side upright part extending from the top face of the cylinder head along the cylinder axis and a downstream-side slanting part having an intake opening communicating with a combustion chamber on one side of an imaginary plane containing the cylinder axis. An upper opening of each intake port opening in the top face of the cylinder head has a peripheral edge extending along the peripheral edge of an upper opening of the plug hole, and the peripheral edge of the upstream-side upright part extends along the outer surface of a lash adjuster.

Abstract: This invention relates to a control system and method for an in-cylinder injection internal combustion engine, which perform control of the timing of fuel injection, the timing of ignition and an EGR rate to assure the stability of combustion in the engine and also its exhaust gas cleaning performance while promoting an improvement in gas mileage by performing injection in compression strokes.

Abstract: This invention relates to an in-cylinder injection internal combustion engine. A recessed portion (22A) is arranged in a top wall of a piston (22) to promote formation of a vertical swirl so that a flow of inducted air introduced into a combustion chamber (27) of the engine is caused to advance from a lower wall (21A) of a cylinder head (21) of the engine toward the top wall of the piston (22) and then to advance backward from the top wall of the piston (22) toward the lower wall (21A) of the cylinder head (21). A corner of the recessed portion (22A) is formed blunter at an outlet side of the vertical swirl than at an inlet side of the vertical swirl. In the in-cylinder injection internal combustion engine in which fuel is injected directly into the combustion chamber (27), it is possible to achieve inter alia a high gas mileage by allowing a lean air-fuel mixture to undergo stratified combustion and also a high power output when a gas-fuel mixture richer than the lean air-fuel mixture is burnt.

Abstract: A fuel feeding system is provided for an internal combustion engine to permit appropriate feeding of fuel in accordance with the state of operation of the engine. A fuel line is arranged as a recirculation circuit between a fuel injector and a fuel tank. A low-pressure fuel pump is arranged in an upstream part of the fuel line. A high-pressure fuel pump is arranged between the fuel pump and the injector. A high-pressure regulator is arranged in a fuel line portion on a downstream side of the regulator to control the pressure of fuel delivered from the pump. A bypass line connects another fuel line portion on an upstream side of the regulator and the fuel line portion each other. A switching valve is arranged in the bypass line to open or close the same. A low-pressure regulator controls the pressure of fuel in the fuel line portion at a pressure lower than a control pressure set by the regulator while the switching valve is open.