Method for shifting a shift-by-wire transmission without engine power

摘要

A vehicle according to the present disclosure includes a shift-by-wire transmission, a pressure source configured to selectively provide hydraulic pressure in the absence of engine power, an internal combustion engine, and a controller. The shift-by-wire transmission includes a hydraulic actuator, and the electric pump is in fluid communication with the actuator. The controller is configured to, in response to a driver input and the engine being off, control the pressure source to provide hydraulic pressure to the hydraulic actuator.

主权项

1. A vehicle comprising:
an internal combustion engine; a shift-by-wire transmission including a hydraulic actuator coupled to a shift element configured to selectively place the transmission in PARK; a pressure source in fluid communication with the hydraulic actuator and configured to selectively provide pressure in the absence of engine power; and a controller configured to, in response a first driver input with the engine off, control the pressure source to provide hydraulic pressure to the hydraulic actuator and to, in response to a second driver input with the engine off, shift the transmission out of PARK without starting the engine.