MULTI-MODE ELECTROMECHANICAL VARIABLE TRANSMISSION

摘要

A vehicle includes an engine, a drive axle, a multi-mode transmission selectively coupled to the engine and the drive axle, and a controller coupled to the multi-mode transmission and configured to selectively configure the multi-mode transmission into an active neutral startup mode of operation in response to an engine start request. The multi-mode transmission includes a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, a first motor/generator coupled to the first gear set, and a second motor/generator electrically coupled to the first motor/generator with a bus, coupled to the second gear set, and selectively coupled to the engine. The first gear set is coupled to the engine, and the first planetary gear carrier and the second planetary gear carrier are rotatably coupled.

主权项

1. A vehicle, comprising:
an engine; a drive axle; a multi-mode transmission selectively coupled to the engine and the drive axle, the multi-mode transmission including:
a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, wherein the first gear set is coupled to the engine, and wherein the first planetary gear carrier and the second planetary gear carrier are rotatably coupled;a first motor/generator coupled to the first gear set; anda second motor/generator electrically coupled to the first motor/generator with a bus, coupled to the second gear set, and selectively coupled to the engine; and a controller coupled to the multi-mode transmission and configured to selectively configure the multi-mode transmission into an active neutral startup mode of operation in response to an engine start request.