Patent ID: 7357105
Filing Date: 2008-04-15
Classification: F01L,Y10T

Abstract:
1. A hydraulic valve driving device that drives a valve in an engine having a crank, comprising: a hydraulic valve actuator operable to drive the valve; a hydraulic pump that generates hydraulic pressure for the valve actuator; first and second motors that generate rotational force; and a transmission mechanism that operates in a first engine-starting mode and then in a second engine-starting mode at the time of engine starting, wherein the transmission mechanism transmits rotational force from the first motor to the hydraulic pump while the crank is at rest in the first engine-starting mode, and the transmission mechanism transmits rotational force from the second motor to the crank and the hydraulic pump in the second engine-starting mode; and wherein the transmission mechanism switches from the first engine-starting mode to the second engine-starting mode when the hydraulic pressure of the hydraulic pump reaches at least a prescribed value during operation in the first engine-starting mode.