Ramp resistance obtaining method for hybrid electric vehicle

A hybrid electric vehicle and acquisition method technology, which is applied in the field of slope resistance estimation of hybrid electric vehicles, can solve the problems of low precision and easy deviation

Active Publication Date: 2014-09-24
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the existing slope resistance estimation method has low precision and is prone to deviation, the present invention provides a method for obtaining slope resistance of a hybrid electric vehicle. The hybrid electric vehicle includes an engine, an ISG motor, a rear motor, a front transmission b

Method used

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  • Ramp resistance obtaining method for hybrid electric vehicle
  • Ramp resistance obtaining method for hybrid electric vehicle
  • Ramp resistance obtaining method for hybrid electric vehicle

Examples

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Embodiment 1

[0033] Based on the hybrid electric vehicle provided above, this example provides a method for obtaining the slope resistance of the hybrid electric vehicle, including the following steps:

[0034] Get the speed ratio n of the front gearbox 1 , the speed ratio n of the rear derailleur 2 , the radius r of the tire and the mass of the vehicle m;

[0035] Obtain the output torque T of the engine through calculation EMS , ISG motor output torque T ISG , and the output torque T of the rear motor ERAD ;

[0036] Obtain the sliding resistance F through the sliding test of the vehicle C ;

[0037] The acceleration of the vehicle is obtained from the vehicle speed difference then pass the expression Obtain vehicle acceleration resistance F Acc ;

[0038] According to the moment of inertia and angular acceleration of the rotating parts on the vehicle, the inertial resistance F of the whole vehicle is obtained j ;

[0039] According to the parameters obtained above, use the...

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Abstract

The invention provides a ramp resistance obtaining method for a hybrid electric vehicle to solve the problems that ramp resistance calculation methods are lower in accuracy and deviation occurs easily in the prior art. According to the ramp resistance obtaining method, the driving force and the resistance of the vehicle are comprehensively considered, a vehicle dynamics equation is established accordingly, the acceleration resistance, the sliding resistance and the like outside the vehicle are considered during conversion, meanwhile, the inertia resistance caused by all rotating parts inside the vehicle is further considered, due to comprehensive consideration, the estimated ramp resistance is accurate and reliable with the obtaining method, and an important basis is provided for a shifting strategy, an SOC (state of charge) balance strategy and a torque distribution strategy for ramps.

Description

technical field [0001] The invention relates to the technical field of automobile electronics, in particular to a slope resistance estimation method of a hybrid electric vehicle. Background technique [0002] Hybrid technology has now entered a mature stage, while technologies such as fuel cell technology, pure electric technology, hydrogen-burning engines, and alternative fuels are still in the research and development stage due to limitations of a series of problems such as technical bottlenecks and infrastructure construction. Therefore, the marketization of hybrid electric vehicles will become more important at present. In the process of research and development of hybrid electric vehicles, technologies such as battery modules, powertrains, and hybrid control units (Hybrid Control Unit, HCU for short) are key factors in the research and development of hybrid electric vehicles. difficulty. [0003] Among them, HCU realizes the control, coordination and energy distributio...

Claims

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Application Information

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IPC IPC(8): B60W40/00B60W40/10
CPCB60W40/00B60W40/10B60W2510/0657B60W2510/083B60W2510/1005B60W2530/10B60W2530/20
Inventor 杨春雷夏珩王俊华魏丹苏建云
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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