Patent ID: 7594491
Filing Date: 2009-09-29
Classification: B60L,F02N,Y02T

Abstract:
1. An internal combustion engine start controller in a vehicle that includes: a power source; an internal combustion engine that is started by using electric power supplied from the power source; a first motor; and a first electric power converter that is constructed so as to be able to perform electric power conversion between the power source and the first motor through switching control of power semiconductor elements, the controller comprising: a start detecting device for detecting whether the engine is in a starting operation; and a first frequency setting device that, when the engine is in a starting operation, sets a switching frequency of the first electric power converter to a frequency lower than that used during normal operation; wherein the vehicle further includes: a second motor that is driven by using the electric power supplied from the power source and is connected to a drive shaft that is different from a shaft to that the first motor is connected; and a second electric power converter constructed so as to be able to perform electric power conversion between the power source and the second motor through switching control of the power semiconductor elements, and the start controller further comprises: a second frequency setting device that, when the engine is in a starting operation, sets a switching frequency of the second electric power converter to a frequency lower than that used during normal operation.