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Electric control closed type hydraulic steering system, control method and vehicle having system

A steering system and closed-control technology, applied in the field of vehicles, can solve the problems of small steering assistance and low driving power, and achieve the effects of increasing the steering assistance of the axle, saving energy and power consumption, and improving the utilization rate.

Active Publication Date: 2012-03-14
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of factors such as vehicle power supply and steering power double-acting cylinder, its driving power and steering power are small, so it is not suitable for use on heavy-duty construction machinery or special vehicles.

Method used

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  • Electric control closed type hydraulic steering system, control method and vehicle having system
  • Electric control closed type hydraulic steering system, control method and vehicle having system
  • Electric control closed type hydraulic steering system, control method and vehicle having system

Examples

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Embodiment Construction

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0034] figure 1 A schematic diagram of the principle of the electronically controlled closed hydraulic steering system according to the present invention is shown. Such as figure 1 As shown, the electronically controlled closed hydraulic steering system includes a hydraulic steering device and a controller 60, and the hydraulic steering device includes: a double steering power cylinder 20 composed of a left steering power cylinder 21 and a right steering power cylinder 22 (see figure 2 ), the double steering power cylinder 20 is arranged between the steering knuckle arms 41, 42 of the steering axle trapezoidal arm 40 and the vehicle axle 50, and provides steering thrust to the steering axle trapezoidal arm 40; the variable pump 10 is driven by the...

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Abstract

The invention discloses an electric control closed type hydraulic steering system and a vehicle having the system. The hydraulic steering system comprises a hydraulic steering device, a variable pump and a controller, wherein the hydraulic steering device comprises a power-assisted steering cylinder; the variable pump is used for directly supplying hydraulic oil to the power-assisted steering cylinder through a main oil path; an output flow of the variable pump and a direction of the oil path are controlled by an electric signal; and the controller is in signal connection with the variable pump and is used for calculating the output flow of the variable pump and confirming the direction of the oil path according to the working condition of the vehicle and a steering requirement signal of a wheel and accordingly outputting the electric signal used for controlling the variable pump. According to a pump-control-cylinder principle, the steering closed type hydraulic control of the vehicleis realized by the hydraulic steering system. The hydraulic steering system is used for supplying a hydraulic power according to a steering requirement and fully utilizing an output power of an engine or a transmission element thereof, thereby meeting an energy-saving requirement, reducing system elements, being beneficial to optimizing and lightening the configuration of the vehicle and being suitable for the steering control of various engineering mechanical vehicles or special vehicles.

Description

technical field [0001] The invention relates to an electronically controlled closed hydraulic steering system and a steering control method suitable for engineering vehicles, and also relates to a vehicle with the hydraulic steering system. Background technique [0002] With the development of construction machinery vehicles or special vehicles in the direction of heavy loads, the functions of multi-axle bearing, multi-axle steering and multi-steering modes are particularly necessary. [0003] For the existing multi-axle vehicles, the hydraulic steering of the vehicle is mainly realized through the control mode of the oil pump-control valve group-steering power cylinder or the control mode of hydraulic power assist and mechanical guidance. For example, the power oil source is provided by the gear pump, the system pressure is guaranteed by the relief valve, and the system flow is regulated by the speed control valve. When the steering is working or not working, the system alw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06B62D6/00B62D101/00B62D113/00B62D123/00B62D127/00
CPCB62D5/065B62D5/0463
Inventor 詹纯新刘权李义刘建华
Owner ZOOMLION HEAVY IND CO LTD
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