Power transmitting apparatuses

摘要

A power transmitting apparatus for a vehicle mounted with a torque converter can be configured to instantly supply sufficient oil to a clutch mechanism on restart of the engine after an idle-stop without an electrically-driven oil pump. A power transmitting apparatus can comprise a torque converter having a torque amplifying function, a clutch mechanism, an oil pump, a clutch control device, an engine control device, and a flow control device. The oil pump can be driven by the driving power of the engine to supply oil to the clutch mechanism and the torque converter to operate them. The flow control device can be configured to limit or prevent the supply of oil to the torque converter by the oil pump and to prioritize the supply of oil to the clutch mechanism when the engine is restarted by the engine control device after the idle-stopped condition.

主权项

1. A power transmitting apparatus comprising:
a torque converter having a torque amplifying function; a clutch adapted to be positioned in a first power transmitting condition in which a driving power of an engine is transmitted to driving wheels via a power transmitting system of the torque converter and a second power transmitting condition in which the driving power of the engine is transmitted to the driving wheels not via a power transmitting system of the torque converter; an oil pump driven by the driving power of the engine to supply oil to the clutch and to the torque converter to operate them; a clutch control device configured to for arbitrarily and selectively operating the clutch in accordance with a condition of a vehicle to position the clutch either in the first power transmitting condition or the second power transmitting condition; and an engine control device for transitioning the engine to an idle-stopped condition by automatically stopping the engine subject to the reduction of vehicle speed below a predetermined value and for restarting the engine subject to the release of a braking operation under the idle-stopped condition or the depression of the accelerator pedal; a linear solenoid for controlling a clutch pressure which is a pressure of oil applied to the clutch; and a selector valve for selecting whether the clutch pressure controlled by the linear solenoid should be applied to the clutch characterized in:
the selector valve is kept in a condition in which the clutch pressure controlled by the linear solenoid is applied to the clutch while the engine is kept in the idle-stopped condition and when the engine is restarted after the end of the idle-stopped condition by the engine control device.