Parameter matching method of constant pressure network power system of hydraulic hybrid vehicle

A hybrid vehicle, constant pressure network technology, applied in hybrid vehicles, fluid hybrid vehicles, pneumatic power devices, etc., can solve problems such as inapplicability to constant pressure network power systems
CN103991373AActive Publication Date: 2014-08-20BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2014-08-20

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Patent Text Reader

Abstract

The invention discloses a parameter matching method of a constant pressure network power system of a hydraulic hybrid vehicle. The constant pressure network power system of the hydraulic hybrid vehicle comprises more than one hydraulic transformer, and for simplifying calculation, a hydraulic transformer group consisting of more than one hydraulic transformer is equivalent to one hydraulic transformer, namely the equivalent hydraulic transformer. The transformer equivalent power, transformer equivalent flows and transformer equivalent displacement represent the performance of the equivalent hydraulic transformer. Therefore, the pressure of a constant pressure network, performance parameters of the equivalent hydraulic transformer, the number of the hydraulic transformers and the displacement and number of hydraulic motors are gradually confirmed according to characteristic driving force of a calculating system and internal relation of parameters. By adopting the method, the parameter matching problem of a hydraulic hybrid vehicle system including the hydraulic transformers is solved, and the matching method is simple and effective, flexible in parameter selection and good in applicability.
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Description

technical field

[0001] The invention relates to a power device parameter design method, in particular to a hydraulic hybrid vehicle constant pressure network power system parameter matching method, which belongs to the power device design method. Background technique

[0002] The current structure of the hydraulic system of a hydraulic hybrid vehicle mainly includes a hydraulic pump, a pump / motor, a high-pressure accumulator, a low-pressure accumulator, a hydraulic cylinder, and a number of hydraulic valves. The traditional hydraulic hybrid vehicle power system is a pump-controlled motor-type speed control system, that is, the engine drives the hydraulic pump to run and drives the hydraulic motor to rotate. The parameter matching of the pump-controlled motor system mainly focuses on the matching of the hydraulic pump, hydraulic motor and accumulator, and the design of each component is relatively independent, which cannot provide a comprehensive parameter relationship of the...

Claims

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