Drive device for hybrid electric vehicle based on transformer, hydraulic pump and multiple motors

A technology for hybrid vehicles and hydraulic motors, applied in hybrid vehicles, air pressure power devices, fluid hybrid vehicles, etc., can solve the problems of poor power performance, heavy weight, low efficiency of variable displacement hydraulic motors, etc., and achieve extended power The effect of output adjustment range, improvement of fuel economy and reduction of installed displacement

CN103213487BActive Publication Date: 2015-09-30BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-09-30

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Abstract

The invention provides a hybrid power vehicle drive device based on a transformer, a hydraulic pump and a multi-joint motor. The hybrid power vehicle drive device comprises an engine, a fixed displacement hydraulic pump, a clutch, a fixed displacement multi-joint hydraulic motor, a one-way valve, a high-pressure energy accumulator, a low-pressure energy accumulator, a three-position five-way reversing valve and a two-position two-way reversing valve, wherein the fixed displacement multi-joint hydraulic motor consists of more than two fixed displacement hydraulic motors; and each motor is independently controlled by a two-position three-way reversing valve so as to adjust the displacement of the fixed displacement hydraulic motors. By the drive device in the form, the engine can be guaranteed to work in a best fuel economic zone; the transmission efficiency can be improved; the stepless speed change and the braking energy recovery of a vehicle can be realized; and five transmission forms, namely purely mechanical transmission, hybrid power transmission without a hydraulic transformer, the hybrid power transmission with the hydraulic transformer, purely hydraulic transmission without the hydraulic transformer and the purely hydraulic transmission with the hydraulic transformer can be provided. Therefore, the power performance of the vehicle can be improved; and the fuel consumption rate of the overall vehicle can be reduced.
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Description

technical field

[0001] The invention relates to a vehicle transmission hybrid driving device, in particular to a hybrid vehicle driving device based on a transformer, a hydraulic pump and multiple hydraulic motors. Background technique

[0002] Energy and environmental issues have become the focus of discussion in today's society, and energy conservation and emission reduction have risen to an issue related to the survival of human beings. As one of the important means to deal with these problems, hybrid power includes electric hybrid power, mechanical hybrid power and hydraulic hybrid power. Among them, the development of electric hybrid power is restricted by battery technology; mechanical hybrid power is difficult to maintain high-efficiency flywheel operation for a long time; hydraulic hybrid power requires the most mature technology and high power density, especially for medium and heavy vehicles. Traditional hydraulic hybrid vehicles usually use variable displacement ...

Examples

Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0022] This embodiment provides a hydraulic hybrid vehicle drive device based on a hydraulic transformer, a fixed-displacement multi-connected hydraulic motor and a fixed-displacement hydraulic pump, such as figure 1 shown. Including engine 2, high-pressure accumulator 3, fixed-displacement hydraulic pump 4, one-way valve 5, hydraulic transformer 6, three-position five-way reversing valve 7, two-position three-way reversing valve 8, rear axle 9, fixed displacement Quantitative multi-connected hydraulic motor 10, clutch 11, high-pressure two-position two-way reversing valve 12, low-pressure two-position low-pressure accumulator 13 and low-pressure accumula...