Patent ID: 7765964
Filing Date: 2010-08-03
Classification: B60K,B60L,B60W,F02D,Y02T

Abstract:
1. A variable valve operating device using a valve-driving motor to vary open and close timings of at least one of an intake valve and an exhaust valve for an internal combustion engine, the variable valve operating device comprising: a first route constructed to supply an electric power from a low voltage accumulator to the valve-driving motor, where the low voltage accumulator is capable of storing a low voltage obtained by stepping down a high voltage supplied from a high voltage power source by means of an electric power conversion circuit; a second route constructed to supply an electric power as the low voltage obtained by stepping down the high voltage by means of the electric power conversion circuit without passing through the low voltage accumulator; and a controller configured to control the valve-driving motor, which receives the supply of electric power via either of the first route or the second route, to vary the open and close timings of the at least one of the intake valve and the exhaust valve on a start of the internal combustion engine, in response to a requirement for varying the open and close timings set at a stop time of the internal combustion engine.