ROTARY CONTROLLED FUEL INJECTION APPARATUS WITH AUTOMATIC SHUT-OFF

摘要

Fuel injection apparatus employing continuously rotating rotors function to control the timing and duration of fuel injection into a cylinder of a diesel engine. The advent of sophisticated electronic drive means for continuously rotating the rotors has given rise to the need for shutting-off fuel injection in the event of a power failure. This invention is directed to overcoming the above problem by providing a shut-off system (54) for automatically venting a pumping cavity (25) of a high-pressure fuel pump (22) to prevent communication of pressurized fuel to a nozzle (13) in response to deactivation of a drive (40) that continuously rotates a control rotor (29) during normal engine operation.