Patent ID: 8246511
Filing Date: 2012-08-21
Classification: B60W,F02D,F02N,F16H,Y02T,Y10T

Abstract:
1. A power transmitting apparatus, comprising: a torque converter having a torque amplifying function; a clutch mechanism configured to be positioned in a first power transmitting condition in which 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 wheels without the power transmitting system of the torque converter; an oil pump driven by the driving power of the engine to supply oil to the clutch mechanism and the torque converter to operate them; a continuously variable transmission supplied with oil by the oil pump to actuate pulleys by hydraulic pressure of the oil to continuously vary a transmission ratio of the continuously variable transmission; a clutch control device configured to selectively operate the clutch mechanism in accordance with a vehicle condition to position the clutch mechanism in either the first power transmitting condition or the second power transmitting condition; an engine control device configured to idle-stop the engine by automatically stopping the engine when vehicle speed is reduced below a predetermined value and to restart the engine when an accelerator pedal is depressed or brakes are released during an idle-stop condition of the engine; and a flow control device 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 and the continuously variable transmission when the vehicle speed is reduced below a predetermined value under a condition wherein fuel to the engine is cut off during vehicle speed reduction.