Abstract: An internal combustion diesel engine having a piston sliding in a cylinder and forming a main combustion chamber between the piston and the cylinder head. The cylinder head also has a pre-combustion chamber which communicates by a connecting passage with the main combustion chamber, with a fuel injection nozzle and glow plug arranged to project into the pre-combustion chamber. In addition, a smaller auxiliary chamber is provided which communicates with the pre-combustion chamber by a nozzle shaped aperture, and supplies additional combustion air to the pre-combustion chamber to help effectuate complete combustion, even at high engine loads, of the air-fuel mixture.

Abstract: An apparatus for controlling fuel injection timing in a diesel engine includes a piston activated by supplied pressure proportional to engine speed to advance the injection timing of the fuel injection pump in accordance with engine operating speed. In accordance with the invention, the injection timing control apparatus is provided with an adjusting mechanism which responds to a supplied indication of engine temperature for advancing the injection timing when the engine is cold and retarding the injection timing when the engine is at normal operating temperature. In a preferred embodiment, the indication of engine temperature is fluid pressure which is controlled by a valve and acts on an adjusting member to increase the tension on the piston return spring when the engine is at operating temperature.

Abstract: A fuel injection system for a compression ignition (Diesel) internal combustion engine, having a fuel injection pump and devices, associated therewith, for increasing the idling speed and advancing the injection timing during cold starting. The idling speed increasing device is coupled to the injection timing advancing device such that both may be operated simultaneously.