Machine powertrain and method

摘要

A machine powertrain includes an engine operably connected to a torque converter and a transmission. A switch associated with the torque converter provides a locking signal indicative of a locked or unlocked condition of the torque converter. A throttle sensor associated with the throttle provides a throttle signal. An electronic controller receives the locking signal and the throttle signal, and controls operation of the engine at least partially based on the throttle signal and the locking signal. The electronic controller determines whether a locked or unlocked condition of the torque converter is present based on the locking signal, determines whether a part throttle operating condition or a full throttle operating condition is present based on the throttle signal, and selects a load-control power curve when the part throttle operating condition is present and when the torque converter switches from the unlocked to the locked condition.

主权项

1. A machine having a powertrain at least partially controlled by a throttle, the powertrain including an engine operably connected to a torque converter having a locking capability, the torque converter connected to a transmission having one or more selectable gear ratios, the machine comprising:
a switch associated with the torque converter and configured to provide a locking signal indicative of a locked or unlocked condition of the torque converter; a throttle sensor associated with the throttle and configured to provide a throttle signal; an electronic controller disposed to receive the locking signal and the throttle signal, the electronic controller configured to control operation of the engine at least partially based on the throttle signal and the locking signal, the electronic controller being configured to:
determine whether a locked or unlocked condition of the torque converter is present based on the locking signal;determine whether a part throttle operating condition or a full throttle operating condition is present based on the throttle signal; andselect a load-control power curve for the engine when the part throttle operating condition is present and when the torque converter switches from the unlocked to the locked condition.