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Measuring method for load of hybrid electric vehicle

A hybrid electric vehicle and measurement method technology, applied in vehicle components, vehicle condition input parameters, data processing management, etc., can solve problems such as inaccurate estimation, low vehicle speed collection accuracy, and inability to calculate gradients.

Active Publication Date: 2016-06-08
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problems existing in the calculation process of the vehicle load in the prior art are that the acquisition accuracy of the vehicle speed is not high, and the estimation is inaccurate when the ground rolling resistance coefficient changes greatly
Obviously, the above errors in vehicle speed and ground rolling resistance coefficient will lead to errors in the final load calculation
[0007] In addition, most vehicles in the prior art must be equipped with a slope sensor to determine the driving slope of the vehicle when calculating the driving load, and on vehicles without a slope sensor, the slope cannot be calculated

Method used

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  • Measuring method for load of hybrid electric vehicle

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Embodiment Construction

[0036] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0037]In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. ...

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Abstract

The invention relates to the technical field of vehicles and provides a measuring method for the load of a hybrid electric vehicle. The measuring method comprises the steps that S1, the vehicle total mass m and the vehicle rotational inertia coefficient sigma are measured; 2, the rolling resistance Ff, the air resistance Fw and the acceleration resistance Fj are calculated according to the vehicle total mass m and the vehicle rotational inertia coefficient sigma; S3, the motor output driving force Ftn in the vehicle running process is measured; and S4, the rolling resistance Ff, the air resistance Fw, the acceleration resistance Fj and the motor output driving force Ftn are substituted into a kinetic equation Ft=Ff+Fw+Fi+Fj, and the gradient is calculated according to the acquired gradient resistance Fi. According to the measuring method for the load of the hybrid electric vehicle, the gradient of the vehicle in the running process is calculated by adopting the formula of the Newton second law, and a gradient sensor does not need to be installed on the vehicle; accordingly, not only is the cost reduced, but also the power performance and the economic performance of the whole vehicle can be optimized.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for measuring the load of a hybrid electric vehicle. Background technique [0002] The so-called hybrid power generally refers to a gasoline-electric hybrid power, that is, a mixture of fuel and electric energy. A hybrid vehicle is an electric motor that serves as an auxiliary power to the engine to drive the vehicle. When the working state of the powertrain is normal driving, the power transmission path of the hybrid electric vehicle is: electric motor or engine and electric motor-AMT-transmission shaft-axle-wheel, see figure 1 . [0003] At present, with the rapid development of hybrid electric vehicles, they are more and more widely used in commercial vehicles, among which buses are the most widely used market for hybrid electric vehicles. Since the driving load of a hybrid electric vehicle directly determines the driving conditions of the engine and has a deci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/076B60W40/13B60W40/12B60W40/10B60W40/105
CPCY02T10/84B60W40/076B60W40/1005B60W40/105B60W40/12B60W40/13B60W2040/1323B60W2530/10B60W2530/16
Inventor 段军峰吴学强王彦波董英荣
Owner WEICHAI POWER CO LTD
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