Method and system for operating a vehicle powertrain

摘要

A system and method for operating a vehicle powertrain are described. In one example, a torque converter that has a variable K factor is adjusted to improve vehicle operation. The system and method may improve vehicle launch and vehicle operation at lower vehicle speeds.

主权项

1. A method for operating a vehicle powertrain, comprising:
increasing a K factor of a torque converter in response to a torque provided via an engine being less than a desired torque, and increasing the K factor in response to barometric pressure and engine knock.