Fuel supply apparatus

A fuel supply system for supplying fuel to the injection nozzles of a multi-cylinder internal combustion engine comprising a cam actuated high pressure pump, an accumulator space which is charged with fuel by the high pressure pump, a rotary distributor member including a delivery passage which is arranged to register in turn with a plurality of outlet ports, the outlet ports being formed in a housing which supports the distributor member and being connected in use, to the injection nozzles respectively, valve means operable to connect said delivery passage to the accumulator space to supply fuel to the engine and to connect said delivery passage to a drain, passage means through which fuel can flow to the high pressure pump, a low pressure fuel supply pump which supplies fuel to the high pressure pump through said passage means, an electrically controlled throttle valve in said passage means, a pressure sensor for providing a signal representative of the fuel pressure in the accumulator space and an electronic control system responsive to the signal provided by said pressure sensor for controlling the operation of said throttle valve thereby to control the amount of fuel delivered by the high pressure pump to the accumulator space.

A fuel supply system for supplying fuel to the injection nozzles of a multi-cylinder internal combustion engine comprising a cam actuated high pressure pump, an accumulator space which is charged with fuel by the high pressure pump, a rotary distributor member including a delivery passage which is arranged to register in turn with a plurality of outlet ports, the outlet ports being formed in a housing which supports the distributor member and being connected in use, to the injection nozzles respectively, valve means operable to connect said delivery passage to the accumulator space to supply fuel to the engine and to connect said delivery passage to a drain, and passage means through which fuel can flow to the high pressure pump, said accumulator space being formed in an accumulator block adapted to be secured to a housing which houses the high pressure pump,

• and further including a spigot mounted on the housing, said spigot having an internal drilling which communicates with said high pressure pump, said accumulator block having an opening to receive said spigot and the drilling within the spigot communicating with the accumulator space.

A fuel supply system for supplying fuel to the injection nozzles of a multi-cylinder internal combustion engine comprising a cam actuated high pressure pump, an accumulator space which is charged with fuel by the high pressure pump, a rotary distributor member including a delivery passage which is arranged to register in turn with a plurality of outlet ports, the outlet ports being formed in a housing which supports the distributor member and being connected in use, to the injection nozzles respectively, valve means operable to connect said delivery passage to the accumulator space to supply fuel to the engine and to connect said delivery passage to a drain, and passage means through which fuel can flow to the high pressure pump, and means operable to limit at least the initial rate of flow of fuel from the accumulator space to the associated engine.

A fuel supply system for supplying fuel to the injection nozzles of a multi-cylinder internal combustion engine comprising a cam actuated high pressure pump, an accumulator space which is charged with fuel by the high pressure pump, a rotary distributor member including a delivery passage which is arranged to register in turn with a plurality of outlet ports, the outlet ports being formed in a housing which supports the distributor member and being connected in use, to the injection nozzles respectively, valve means operable to connect said delivery passage to the accumulator space to supply fuel to the engine and to connect said delivery passage to a drain, passage means through which fuel can flow to the high pressure pump, a further accumulator space in which fuel is stored at a lower pressure, said valve means comprising a first valve operable to connect said first mentioned accumulator space to said delivery passage when a substantially unrestricted fuel delivery to the engine is required, a second valve operable to connect the further accumulator space to the delivery passage when a restricted fuel delivery to the engine is required and a third valve operable to connect said delivery passage to a drain to terminate delivery of fuel to the engine.