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Parallel hybrid transmission having a single motor/generator

A generator and mechanical transmission technology, applied in the direction of transmission, gear transmission, multi-ratio transmission, etc., can solve the problems of high cost, high weight, energy loss, etc.

Inactive Publication Date: 2007-03-07
GENERAL MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Series electric drive systems have been plagued by high weight and high cost of electrical machinery during power conversion from mechanical to electrical energy in the generator and electrical to mechanical energy in the drive motor, and by energy losses in these conversions troubled

Method used

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  • Parallel hybrid transmission having a single motor/generator
  • Parallel hybrid transmission having a single motor/generator
  • Parallel hybrid transmission having a single motor/generator

Examples

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Embodiment Construction

[0025] One representative form of an electro-mechanical transmission with a single motor / generator incorporating the inventive concept is shown in FIG. 1A and is indicated generally by numeral 10 . The hybrid transmission 10 has an input member 17 , which may be a shaft-like body, which may be directly driven by the engine 12 . The engine 12 may be a fossil fuel generator, such as an internal combustion engine or a diesel engine, which is readily adapted to provide a useful power output delivered at a constant revolutions per minute (rpm). A pump 18 for supplying lubrication and cooling fluid to the entire transmission 10 can be detached from the input member 17 . Power flows from the input member 17 through the transmission 10 as described below to the output member 19 which drives the final drive 16 .

[0026]The transmission 10 includes a first planetary gear set 20 that includes a sun gear member 22 , a ring gear member 24 that circumscribes the sun gear member 22 , and a...

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Abstract

A reduced cost, compact parallel hybrid transmission having only a single motor / generator is provided. The transmission utilizes a reduced number of components, preferably only three interconnecting members and four torque-transmitting mechanisms, to provide a reverse speed mode and seven forward speed modes (i.e., operating states achieved by engagement of a particular torque-transmitting mechanism or torque-transmitting mechanisms, whether encompassing a continuous range of speed ratios or only a fixed speed ratio). At least five of the forward modes are fixed speed ratios.

Description

technical field [0001] The invention relates to electrically variable transmissions with parallel power flow and a single power unit. Background technique [0002] Internal combustion engines, particularly those of the reciprocating piston type, are currently used to power most vehicles. Such engines are relatively efficient, compact, lightweight and inexpensive devices by which highly concentrated energy in the form of fuel can be converted into efficient mechanical power. New transmission systems that can be used with internal combustion engines and that can reduce fuel consumption and emissions would be of great benefit to the public. [0003] The wide variation in demand for vehicles typically housing internal combustion engines increases fuel consumption and displacement beyond the ideal case for the aforementioned engines. Typically, the vehicle is powered by the aforementioned engine, which is started from cold by a small electric motor and a relatively small electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/44
CPCY10S903/911F16H2200/2041B60K6/547F16H2200/0052B60K6/48F16H2200/201F16H3/725B60K6/365Y02T10/6221Y02T10/62
Inventor M·R·施密德特
Owner GENERAL MOTORS CORP
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