Hybrid vehicle with electric transmission and electric drive module

Abstract

A hybrid vehicle is provided with an electric transmission operatively connected to a first axle and an electric drive module operatively connected to a second axle. A transmission ratio of a differential gear set and a final drive of the electric transmission are selected so that a torque ratio of torque of the first axle over the torque of the engine is that at which any working chamber of the engine that is operated to expand the working fluid can operate without throttling, without torque of the engine torque exceeding a torque necessary to propel the vehicle at a steady vehicle speed, and with the second electric machine freewheeling.

Description

technical field [0001] The invention generally includes hybrid vehicles configured for efficient engine performance. Background technique [0002] A vehicle may be equipped with one or more front wheels and one or more rear wheels. The vehicle may be equipped with an engine that produces shaft power to propel the vehicle. Vehicles may be equipped with a transmission for converting shaft power from an engine output—relatively low torque and high speed—to relatively high torque and low speed to drive one or more wheels. Vehicles may be equipped with axles for transmitting shaft power from both transmissions to one or more wheels. It is advantageous, especially in relation to mechanical simplicity, to use the engine, transmission and axles to drive only the front wheels or only the rear wheels. It is advantageous, especially in relation to operation in various environmental conditions, to drive all wheels. [0003] The forces that propel a wheeled vehicle at a steady speed ...

AI Technical Summary

Problems solved by technology

However, generally reducing the amount of air used for the cylinders below a specified level will reduce the net expansion of the gases and thus greatly reduce the efficiency of the engine

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