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Control system for electric hydraulic power-assisted steering and control method thereof

A technology of hydraulic power steering and control system, applied in power steering mechanism, steering mechanism, fluid steering mechanism, etc., can solve the problems of inability to meet normal power steering requirements, large volume, insufficient energy, etc.

Inactive Publication Date: 2017-07-04
XIAMEN FUGONG POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing processing technology includes adding an emergency protection power supply DC-DC (low voltage to high voltage) converter, and adding a power circuit to the traditional electro-hydraulic power steering control system. Not only is the cost high, the volume is large and the layout is inconvenient, but the system can only There are limitations in the use of vehicles with a voltage platform above 400v. Once there is a problem with any of the booster controller and booster motor, its emergency protection function will fail, and the problem cannot be solved at the root; secondly, add accumulator and pressure maintaining valve mechanism technology , store a certain amount of high-pressure oil in the accumulator, release it when there is a power boost emergency, and provide a certain running time for steering, but there is insufficient energy, and it cannot meet the normal power boost operation requirements in an emergency under high load, so the root cause cannot solve this problem Help with emergency issues

Method used

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  • Control system for electric hydraulic power-assisted steering and control method thereof
  • Control system for electric hydraulic power-assisted steering and control method thereof
  • Control system for electric hydraulic power-assisted steering and control method thereof

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Embodiment 1

[0049] see Figure 1-3 , Embodiment 1 of the present invention is:

[0050] An electro-hydraulic power-assisted steering control system provided by the present invention includes: a dual integrated controller, a dual-winding integrated power-assisted motor, an electro-hydraulic power-assisted steering pump assembly, and a vehicle controller;

[0051] The dual integrated controller includes a permanent magnet synchronous controller and a DC brushless controller; the dual-winding integrated booster motor is composed of a high-voltage permanent magnet synchronous motor and a low-voltage DC brushless motor that share a rotor, and the permanent magnet synchronous controller They are respectively connected to the vehicle controller and the high-voltage permanent magnet synchronous motor, the DC brushless controller is respectively connected to the vehicle controller and the low-voltage DC brushless motor, and the output end of the dual-winding integrated power-assisted motor is conn...

Embodiment 2

[0055] On the basis of the first embodiment above, the dual-winding integrated power-assisted motor is further limited, specifically:

[0056] The double-winding integrated booster motor includes a motor housing, and a stator assembly is arranged inside the motor housing. The stator assembly includes a stator core, and a low-voltage stator winding and a high-voltage stator winding are arranged on the stator core. . By setting the low-voltage stator winding and the high-voltage stator winding on the stator core, and the windings are independent of each other, two output states can be obtained by electrifying the two sets of windings at different time periods.

[0057] In a specific embodiment, the stator assembly is made of laminated silicon steel sheets insulated from each other, and the inner circle of the silicon steel sheets is punched with special grooves evenly distributed, and the grooves are divided into semi-closed slots with upper and lower holes. The stator winding i...

Embodiment 3

[0062] On the basis of the second embodiment above, the installation structure of the double-winding integrated power-assisted motor is further limited, specifically: it also includes the motor front end cover 1 and the motor rear end cover 14; the front end cover of the motor is provided with a mounting front bearing 4 The first bearing groove, the skeleton oil seal 3 is arranged in the first bearing groove; the second bearing groove for fixing the rear bearing 13 is arranged on the motor rear end cover 14; the sealing ring 6 is arranged on the motor front end cover.

[0063] During the installation process, the skeleton oil seal 3 is inlaid with the bearing groove in the motor front cover 1, and the front bearing 4 of the motor housing assembly is fitted into the motor front cover 1 with clearance fit, and the O-shaped seal on the motor front cover is used. The sealing ring 6 seals the motor housing assembly, and then locks the motor front end cover 1 and the motor housing 10...

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PUM

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Abstract

The invention relates to the field of new energy automobiles, in particular to a control system for electric hydraulic power-assisted steering and a control method thereof. The control system for electric hydraulic power-assisted steering comprises a double integrated controller, a double-winding integrated power-assisted motor, an electric hydraulic power-assisted steering pump assembly and a vehicle controller. The double integrated controller comprises a permanently-magnetic synchronous controller body and a direct current brushless controller body. The double-winding integrated power-assisted motor is composed of a high-pressure permanently-magnetic synchronous motor body and a low-pressure brushless direct current motor body which share a rotor and is in output connection with the electric hydraulic power-assisted steering pump assembly. The double integrated controller is used for converting the mode that steering assisted power is provided by the high-pressure permanently-magnetic synchronous motor body into the mode that steering assisted power is provided by the low-pressure brushless direct current motor body when the condition that the automobile sends abnormal information out is collected by the vehicle controller.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to an electro-hydraulic power steering control system and a control method thereof. Background technique [0002] The electro-hydraulic power steering system is a key component of the vehicle, which is directly related to the handling, stability and safety of the vehicle. The electrohydraulic power steering system in the prior art is generally mainly composed of an energy storage mechanism, a frequency conversion controller, an electrohydraulic power steering pump assembly, a hydraulic oil tank, and a steering gear. The frequency conversion controller outputs an AC voltage with variable frequency to drive the electrohydraulic power steering system. The power steering pump assembly uses the hydraulic pump of the electrohydraulic power steering pump assembly to make the fluid in the hydraulic oil tank flow to the steering gear at a flow rate to provide power for the steering system....

Claims

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Application Information

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IPC IPC(8): B62D5/30B62D5/06
CPCB62D5/30B62D5/062B62D5/064
Inventor 杨炫松黄清河林宗剑
Owner XIAMEN FUGONG POWER TECH