Patent ID: 11938789
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Transport (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 18:
19. A transmission control system for a transmission selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle, the transmission control system comprising:
a motor generator selectively coupled to a countershaft of the transmission and configured to charge a battery in an energy storage mode and be powered by the battery in an energy use mode;
an HVAC compressor selectively driven by the motor generator; and
a controller that selectively and alternatively operates the transmission in various modes based on operating conditions, wherein the various modes comprise:
(i) a “crank mode” wherein the HVAC compressor is disengaged from the motor generator and the motor generator turns the internal combustion engine;
(ii) a “creep mode” wherein the HVAC compressor is disengaged from the motor generator and the motor generator provides motive power to the vehicle;
(iii) a “driving with no HVAC mode” wherein the HVAC compressor is disengaged from the motor generator and a master clutch is closed while propelling the vehicle, and open during an engine off coasting (EOC) mode wherein the internal combustion engine is defueled and the motor generator is in the energy storage mode where rotational energy is routed from an output shaft of the transmission, through the countershaft and into the motor generator;
(iv) a “driving with HVAC mode” wherein the HVAC compressor is engaged with the motor generator and the master clutch is closed while propelling the vehicle and open during EOC, wherein the internal combustion engine is defueled and the motor generator is in the energy storage mode where rotational energy is routed from an output shaft of the transmission, through the countershaft and into the motor generator; and
(v) a “sleep mode” wherein the motor generator is disengaged from the countershaft and coupled to the HVAC compressor, the motor generator powering the HVAC compressor using energy stored while driving.