Patent ID: 6910463
Filing Date: 2005-06-28
Classification: F02D,F02M

Abstract:
1. A fuel injection system comprising: a common rail for accumulating high-pressure fuel pressurized by a high-pressure pump; a fuel injection valve equipped with a needle valve, an injection fuel reservoir, and a fuel chamber for imparting backpressure to the needle valve; a supplied fuel line communicating the injection fuel reservoir and the common rail; a booster installed in the supplied fuel line to be capable of boosting the pressure of the high-pressure fuel and sending it to the injection fuel reservoir as pressure-boosted high-pressure fuel; and a switching unit for fuel pressure switching that is equipped with an electric actuator and conducts switching to select one or the other of the high-pressure fuel from the common rail and the pressure-boosted high-pressure fuel from the booster as the fuel sent to the injection fuel reservoir and for releasing backpressure from said needle valve.