Patent ID: 7139652
Filing Date: 2006-11-21
Classification: B60K,F16H,Y10T

Abstract:
1. A range selection control device of a shift-by-wire type automatic transmission of a motor vehicle, comprising: a range selector that issues a range selection command signal representative of an operation range of the transmission meeting with a driver's intention, the operating range being at least one of P(parking)-range, R(reverse)-range, N(neutral)-range and D(drive)-range; an actuator that causes the transmission to assume a certain operation range when receiving an instruction signal; and a control unit that issues the instruction signal by processing the range selection command signal, so that the transmission is able to assume an operation range that meets with the driver's intention, wherein the control unit is configured to carry out: when the range selector fails to issue the range selection command signal, presuming a range selection intended by the driver based on a previous operation of the range selector; and based on the presumption, causing through the actuator the transmission to actually carry out at least one of first and second range selection operations, the first range selection operation meeting with the driver's intention and the second range selection operation being to maintain the operation range that has been kept just before the failure of the range selector.