A variable pump displacement control method for a hub motor hydraulic drive system

A displacement control method and in-wheel motor technology, applied in the direction of control devices, auxiliary drive devices, power devices, etc., can solve the problems of complex working environment, insufficient speed and fuel economy of all-wheel drive vehicles, etc.

Inactive Publication Date: 2016-04-13
JILIN UNIV
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  • Application Information

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Problems solved by technology

However, the working environment of general engineering vehicles is relatively complicated. Although there are sometimes slippery roads or steep slopes, most of them are flat and good hard roads.
On good road conditions, all-wheel drive vehicles are not good enough in terms of speed and fuel economy.

Method used

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  • A variable pump displacement control method for a hub motor hydraulic drive system
  • A variable pump displacement control method for a hub motor hydraulic drive system
  • A variable pump displacement control method for a hub motor hydraulic drive system

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Embodiment Construction

[0085] The present invention will be further described below in conjunction with the accompanying drawings.

[0086] The invention discloses a variable pump displacement control method of a hub motor hydraulic drive system. A controller connected to the CAN bus of the vehicle is adopted. The controller communicates with the engine ECU and the vehicle electronic control unit connected to the bus through the CAN bus component communication. The core of the controller's control program is to adjust the displacement of the variable pump by using the feedforward + feedback method. After the driver presses the main switch of the system, the controller does not require the driver to do any other operations. On low-adhesion and steep-slope roads, the controller can control the system to significantly improve the passing capacity of the vehicle and optimize the slipping efficiency of the vehicle.

[0087] When the car is running on a bad road and the driver presses the wheel hub moto...

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Abstract

The invention relates to a displacement control method for a hub motor fluid power system variable pump, and belongs to an automobile control system. The revolving speed of front wheels follows the revolving speed of rear wheels. The displacement control method is mainly divided into static regulation and PI (proportional integral) regulation, wherein the static regulation comprises two steps of gear estimation and displacement table search; the table is directly searched according to the estimated gear to obtain a constant value displacement, i.e. the static displacement; the PI feedback regulation of the difference value of the front wheel speed and the rear wheel speed needs to be added to correct the static displacement. The displacement control method for the hub motor fluid power system variable pump has the advantages that the front wheel speed and the rear wheel speed of the automobile can be consistent under the control of the control method when the system is under the auxiliary driving working condition, and the trackslip efficiency of the whole automobile is optimal while the hub motor fluid power system is controlled to obviously improve the passage capacity of the whole automobile on a low-adhering road surface or a road surface with a big slope.

Description

technical field [0001] The invention belongs to an automobile control system, in particular to a method for controlling the displacement of a variable pump in a hub motor hydraulic drive system. Background technique [0002] Commercial vehicles, heavy trucks and engineering vehicles often encounter unsteady ground such as mine roads, country roads, construction sites, and slippery roads such as mud, ice and snow. Its adhesion coefficient is generally small, and occasionally has a large slope. The driving wheel of a traditional single-axle drive vehicle may slip under these conditions, and the vehicle's passability is poor. The all-wheel drive vehicle overcomes the shortcomings of the traditional single-axle drive vehicle, can effectively use the attached weight, obtain the maximum driving force, and obviously enhance its passing performance on bad roads. However, the working environment of general engineering vehicles is relatively complicated. Although there are sometimes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K7/00B60K25/02B60W10/08B60W10/06B60W40/00B60W40/10
Inventor 曾小华贺辉宋大凤李胜李相华彭君白鸽杨南南彭宇君王庆年
Owner JILIN UNIV
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