Abstract: An injector has an orifice plate formed with plural orifices. At a radially outward position of the orifice plate is disposed a wall at least partially. It is preferable that the wall be disposed at a lower position in the direction of gravity. In the wall is formed a guide hole toward an area on the orifice plate where a strong negative pressure is developed. A portion of fuel injected from the injector adheres as adhered fuel to the orifice plate or the wall. Under the action of a negative pressure on the orifice plate the guide hole sucks in the adhered fuel and returns it onto the surface of the orifice plate. The adhered fuel flows from the wall onto the surface of the orifice plate and again joins a fuel jet injected from the orifices. By utilizing a negative pressure developed near the plural orifices, the adhered fuel can be recovered and again injected. Consequently, it is possible to decrease the amount of adhered fuel.

Abstract: An injector has an orifice plate formed with plural orifices. At a radially outward position of the orifice plate is disposed a wall at least partially. It is preferable that the wall be disposed at a lower position in the direction of gravity. In the wall is formed a guide hole toward an area on the orifice plate where a strong negative pressure is developed. A portion of fuel injected from the injector adheres as adhered fuel to the orifice plate or the wall. Under the action of a negative pressure on the orifice plate the guide hole sucks in the adhered fuel and returns it onto the surface of the orifice plate. The adhered fuel flows from the wall onto the surface of the orifice plate and again joins a fuel jet injected from the orifices. By utilizing a negative pressure developed near the plural orifices, the adhered fuel can be recovered and again injected. Consequently, it is possible to decrease the amount of adhered fuel.

Abstract: A fuel injection apparatus which prevents delay of the pressurization of the fuel injected and deterioration of the starting characteristic at the time of engine cold starts and the resultant increase in emission of hydrocarbons by leading to an auxiliary startup pump the hydraulic pressure generated in the hydraulic cylinders supporting the driver's seat when the driver gets in the car and sits on the seat before startup, converts this to a high fuel pressure by large and small diameter cylinders, and obtains a fuel spray with a good atomization by a high fuel pressure immediately after startup. Other forces which can be used are the force generated in a hydraulic damper of a suspension by the weight of the driver when getting in the car, the force of opening the driver's side door, the force of stepping on the brake pedal, etc.

Abstract: A fuel injection control device in a cylinder direct injection engine which switches between premixed combustion by intake stroke injection and stratified combustion by compression stroke injection in accordance with a change of an engine speed or a required load, where an unpleasant torque shock occurring when the injection mode is changed and the combustion state is changed despite the vehicle operating in the driving pattern such as driving on an upward slope or downward slope is prevented by maintaining the same injection mode while the vehicle continues to operate in the same driving state and where stratified combustion by the compression stroke injection is carried out when the vehicle is in driving on a downward slope, but is augmented by intake stroke injection when the vehicle sharply accelerates and the torque becomes insufficient.

Abstract: In an internal combustion engine with a fuel injector for injecting fuel directly into the cylinder, in which a current combustion is changed between pre-mixture combustion and stratified charge combustion in accordance with a current engine operating condition and the flow of cooling water in a cooling system of the engine is varied according to the current combustion.

Abstract: A fuel supply system for a hydrogen gas engine, having a metal hydride tank in which pellets or powders of a metal hydride absorbing and storing alloy are stored. A heat exchange device is arranged in the tank in contact with the metal hydride therein. The heat exchange device is connected to a heating medium source, such as an engine water jacket, for supplying the heating medium to the heat exchange device, for separating hydrogen gas from the metal hydride. A fuel supply conduit is provided for connecting the metal hydride tank with the engine. A hydrogen gas flow control valve and a hydrogen gas flow meter are arranged in series in the conduit. A controller is provided for controlling the hydrogen gas flow control valve so that a desired amount of the hydrogen gas, as detected by the hydrogen gas flow meter, is obtained. A sub tank may be provided for storing an excess amount of hydrogen gas from the main tank, which is introduced into the engine via a sonic valve.