Parallel-connection type hydraulic-electro hybrid power driving system

A hybrid and drive system technology, applied in hybrid vehicles, power plants, electric vehicles, etc., can solve the problem that energy storage devices are difficult to meet the requirements of high power density and high energy density, low braking energy recovery rate, and the use of components. Short life and other problems, to achieve the effect of solving the difficulty of instantaneous charging and discharging of large current, simple structure and high reliability
CN101704337AActive Publication Date: 2010-05-12JIANGSU XCMG CONSTR MASCH RES INST LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
JIANGSU XCMG CONSTR MASCH RES INST LTD
Publication Date
2010-05-12

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Abstract

The invention relates to a parallel-connection type hydraulic-electro hybrid power driving system, belonging to a driving system of a vehicle. An engine of the power driving system is sequentially and mechanically connected with a clutch and a speed changer; an input shaft of a torque coupler is mechanically connected with an output shaft of the speed changer; an inverter is respectively connected with a motor and a storage battery, and the other end of the motor is sequentially and mechanically connected with output shafts of an electromagnetic clutch and a hydraulic pump / motor; an oil inlet port of an overflow valve is communicated with an oil way port of high-pressure hydraulic energy storage; an oil inlet port of a hydraulic pump / motor control assembly is communicated with an oil outlet port of a reducing valve; the oil outlet port of the hydraulic pump / motor, the oil outlet port of the hydraulic pump / motor control assembly and the oil outlet port of the overflow valve are communicated with an oil tank; and the oil outlet port of a two-position and two-way electro-hydraulic directional valve is communicated with the oil inlet port of the hydraulic pump / motor. The invention has the advantages of simple structure, mature technology, high reliability, low cost, attention of low-speed area and high-speed area of the vehicle, improvement of the power performance of the vehicle and elongation of the service life of the vehicle.
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Description

technical field

[0001] The invention relates to a vehicle drive system, in particular to a parallel hydraulic-electric hybrid drive system. Background technique

[0002] At present, the drive system of hybrid electric vehicles is mainly divided into three modes: series, parallel and hybrid. The hybrid system adopts a gear coupling transmission structure and is equipped with a variable speed system. The system structure is complex, there are many components, and the industrialization is relatively difficult. Therefore, hybrid vehicles mostly use series or parallel power drive systems. However, there are many energy conversion links in the series type, and the overall efficiency is not very high, so the parallel type is widely used. Hybrid vehicles require energy storage devices to be able to recover and release a large amount of power in a short period of time, and have relatively high power density and energy density. At present, most of the energy storage devices of hybr...

Claims

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