The present invention concerns a multi-cylinder engine comprising a throttle body (5) in which a throttle intake-air passage (6) is provided. A throttle valve (7) is arranged in this throttle intake-air passage (6). Attached to the throttle body (5) is an injector (8), a leading end portion (9) of which is arranged opposite to an interior area of the throttle intake-air passage (6) downstream of the throttle valve (7) and is opened to provided a liquid-fuel injection hole (10). An intake-air pre...

A control apparatus for an internal combustion engine prevents variation of an air fuel ratio even upon introduction of purge air. A delay time occurring until the intake air detected, after having arrived at the combustion chamber through a surge tank, influences an air fuel ratio sensor, a delay time occurring until purge air containing evaporated fuel generated upon purging a canister, after having arrived at the combustion chamber through the surge tank, influences the air fuel ratio sensor,...

A fuel is injected based on the rpm of the engine and the suction air rate. The fuel injection amount is corrected depending on a map of fuel injection share correction coefficient prepared in advance and determined by data such as a throttle valve opening and the rpm of the engine so that amounts of fuel injected will be even at the respective cylinders. The fuel injection share correction coefficient is for correcting fuel deviation due to construction of suction passage to with the respective...

A fuel injection supply system for an internal combustion engine provided with an even number more than four cylinders. The first intake manifold is connected to the first cylinder group comprising one half of the cylinders and the second intake manifold is connected to the second cylinder group comprising the other half of the cylinders. A passage collector member is provided which collects the intake passages so as to communicate the intake ports of the first and second manifolds each other, a...

A fuel injector clamp takes the form of a generally oval-shaped ring manufactured from pipe so that the side walls on the minor axis enclose flats on opposite sides of the injector body and the end walls on the major axis each encircle a respective fixing bolt. The end walls encircle more than 180 degrees of the circumference of the bolt. The side walls adjacent each end are pinched inwards towards one another, but are not fully brought together. Encirclement of the fixing bolts in this way serv...

A fuel injection system for a multibank engine having separate intake manifolds and throttle valves for each bank. Separate manifold pressure sensors for each bank are employed to determine injection signals for corresponding cylinders within each bank.

An anti-rotation clip for joining a fuel injector body to a fuel rail socket. A C-shaped base is formed to slide into an annular groove in the injector body. A pair of tangs extend from the base to straddle a rib on the injector body to prevent rotation between the clip and the injector. Opposed sidewalls extending from the base include windows for receiving a radial flange of the fuel rail socket to correctly position the fuel injector axially within the socket. Each window is divided by a lock...

The invention concerns a device for fixing a fuel injector on an internal combustion engine cylinder head consisting of a part called bottom part (2a) for covering at least an engine cylinder and a part called top part (2b) defining with the other part a chamber (5) containing mechanical members for actuating valves. The injector (1) passes through these two parts and is supported on the base (8) of a well (4) of the bottom part (2a) by a flange (9) fixed to the cylinder head (13) with screws, a...

A device for fixing a fuel injector (12) in an internal combustion engine cylinder head (1) whereon is set a camshaft bracket (4) top surface delimiting with this surface a chamber (8) containing valve-actuating mechanical members. The injector (12) passes through the camshaft bracket (4) and the cylinder head (1) supported on the base (18) of a recess (14) in the cylinder head by a fork (20) fixed by a screw (26) to the cylinder head (1). The fork (20) is arranged in the chamber (8) under a cam...

A fuel injection control strategy and system for engines for maintaining good performance under normal running conditions and also for providing cylinder engine speed slow-down under abnormal conditions by cylinder skipping. Transitional operation between these modes is improved by changing injection timing and/or injection duration of the operating cylinders during this time. Adjustment in spark timing may also be incorporated along with this routine.