Hydraulic hybrid power transmission system with self-adaption switching function

A hybrid power and transmission system technology, applied in the field of power transmission, can solve problems such as increasing the difficulty of system control and the complexity of the structure

Active Publication Date: 2015-11-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
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Problems solved by technology

At present, the four-quadrant characteristics of the power system need to be controlled by means of sole

Method used

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  • Hydraulic hybrid power transmission system with self-adaption switching function
  • Hydraulic hybrid power transmission system with self-adaption switching function

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Embodiment Construction

[0013] Combine below figure 1 The present invention will be described in detail.

[0014] This embodiment provides a hydraulic hybrid power transmission system with an adaptive reversing function, which can realize adaptive switching of vehicle driving / braking with the change of the control angle of the hydraulic transformer, without additional control, and improves work efficiency , to simplify the complexity of vehicle control.

[0015] The hydraulic hybrid transmission system includes an engine 2, a high-pressure accumulator 3, a low-pressure accumulator 13, a constant-pressure variable pump 5, a hydraulic transformer 7 and a hydraulic motor 9; the peripheral device is the final drive 10 of the vehicle. Let the three ports of the hydraulic transformer 7 be Port A, Port B and Port T respectively. The hydraulic motor 9 is a two-way quantitative motor, and its two oil ports are oil port A and oil port B respectively.

[0016] Its connection relationship is as figure 1 As s...

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Abstract

The invention discloses a hydraulic hybrid power transmission system with a self-adaption switching function, and belongs to the field of power transmission. The hydraulic hybrid power transmission system comprises an engine, a high-pressure energy accumulator, a low-pressure energy accumulator, a constant-pressure variable pump, a hydraulic transformer, a fixed-displacement hydraulic motor and two hydraulic-control one-way valves. When a vehicle needs to switch between driving/braking conditions, after the control angle of the hydraulic transformer is changed, the two hydraulic-control one-way valves are controlled through the cross feedback of system pressure, so that the self-adaption switching between driving/braking conditions is realized; therefore, the control complexity and the control difficulty of the hydraulic hybrid power transmission system are reduced.

Description

technical field [0001] The invention relates to a hydraulic hybrid power transmission system, in particular to a hydraulic hybrid power transmission system with an adaptive reversing function, which belongs to the field of power transmission. Background technique [0002] Hydrostatic transmission technology has the advantages of high power density and stepless speed regulation. With the increasingly serious environmental and energy problems, hydraulic hybrid drive technology based on hydrostatic transmission technology has developed rapidly. The initial hydraulic hybrid power system was mainly in the form of a pump-controlled motor. With the rise and development of hydraulic constant voltage networks and hydraulic transformers, a hydraulic hybrid power system based on hydraulic constant voltage networks and hydraulic transformers appeared. The advantage of this kind of power system is: the hydraulic constant voltage network can output energy through the hydraulic transformer...

Claims

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Application Information

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IPC IPC(8): B60K6/22B60K6/42B60K17/10
Inventor 吴维狄崇峰胡纪滨苑士华荆崇波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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