Patent ID: 7240660
Filing Date: 2007-07-10
Classification: F01P,F02D,Y02T

Abstract:
1. A method of reducing heat generated in a fuel injector driver controlled by an engine control unit (ECU) of a vehicle engine, said engine including at least a first fuel injector and a second fuel injector, the method comprising: varying a number of fuel injections performed by the first fuel injector in an engine cycle as a temperature of the ECU varies, where during a first ECU temperature condition said first fuel injector performs a first number of injections in an engine cycle, said first number being at least two injections, and during a second temperature condition higher than said first temperature condition said first fuel injector performs a second number of injections less than said first number of injections in an engine cycle, said second number being at least one injection; and wherein at least during the second temperature condition, disabling all fuel injection by the second fuel injector in an engine cycle.