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Electric power steering system and vehicle control system including the electric power steering system

A technology of electric power steering and electric power, which is applied in the direction of control system, motor control, power steering mechanism, etc., and can solve problems such as loss of power supply of power steering equipment, current reduction, voltage drop of other equipment, etc.

Inactive Publication Date: 2016-02-10
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if there is a problem with the integrated ie non-redundant power supply lines, the power supply to the power steering equipment is immediately lost
[0008] In addition, even in the case where the in-vehicle power supply equipment has two systems, power is usually supplied to many electrical equipment only from the main power supply, so that the operation of one equipment that consumes a large amount of power affects the operation of other equipment, that is, applying full auxiliary The power steering equipment of the power causes the voltage drop or current drop of other equipment

Method used

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  • Electric power steering system and vehicle control system including the electric power steering system
  • Electric power steering system and vehicle control system including the electric power steering system
  • Electric power steering system and vehicle control system including the electric power steering system

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no. 1 approach

[0023] refer to Figure 1 to Figure 3 The electric power steering system 100 and the vehicle control system 200 according to the first embodiment of the present disclosure will be described.

[0024] (vehicle control system 200)

[0025] First, an overview of the vehicle control system 200 will be described. The vehicle control system 200 is a system in a vehicle that organizes: in-vehicle devices that provide basic functions such as "running, steering, and stopping"; and other devices that provide other functions such as power supply functions and the like.

[0026] More specifically, as figure 1 As shown, the vehicle control system 200 is provided with an electric power steering device 1 , a starter 2 , a brake controller 3 , other in-vehicle devices 4 , a battery 5 , a battery 6 , a power switch 7 and the like.

[0027] The electric power steering device 1 is a power assist device for assisting a driver's steering operation, and provides or "guarantees" a steering functi...

no. 2 approach

[0078] Figure 4 A vehicle control device 201 in the second embodiment of the present disclosure is shown in . The vehicle control device 201 is different from the above-described embodiment in that not only the electric power steering device 1 but also the starter 2 and the brake controller 3 are connected to the power switch 7 .

[0079] According to the present embodiment, two power supply lines L31 and L32 are connected to the starter 2 . One of the two lines (ie, the power supply line L31 ) is connected to the first switching relay 71 of the power switch 7 , and the other line (ie, the power supply line L32 ) is connected to the second switching relay 72 of the power switch 7 .

[0080] In addition, two power supply lines L41 and L42 are connected to the brake controller 3 . One of the two lines (ie, the power supply line L41 ) is connected to the first switching relay 71 of the power switch 7 , and the other line (ie, the power supply line L42 ) is connected to the sec...

no. 3 approach

[0087] Figure 5 A vehicle control device 202 using the electric power steering system 101 in the third embodiment of the present disclosure is shown in . The present embodiment focuses on the power switch 9 of the electric power steering system 101 other than the power switch 7 .

[0088] The power switch 9 is different from the power switch 7 of the first embodiment in that it is arranged in the power steering apparatus 1 . The power switch 9 is a single-pole double-throw type relay, and can electrically connect one of the first power connector 41 and the second power connector 42 to, for example, the controller 30 . Furthermore, the power switch 9 may be constructed of a semiconductor switching element, a mechanical relay, etc. such as MOSFET, IGBT, etc., and the power switch 9 may be arranged on the substrate 37 of the drive unit 10 together with the controller 30 .

[0089] The power switch 9 is controlled by a high-level system such as an ECU that can detect an abnorma...

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Abstract

An electric power steering system and a vehicle control system including the same. The electric power steering system includes an electric power steering device. The electric power steering device includes an electric motor, a controller controlling the motor, and two power supply connectors that assist a steering operation of a vehicle. The electric power steering system also includes a first power supply supplying power to a first connector, a second power supply supplying power to a second connector and to other in-vehicle devices other than the electric power steering device, and a power switcher provided in a route to the controller, to electrically connect the first power supply to the controller when power supply from the first power supply is normal, and to electrically connect the second power supply to the controller when the power supply from the first power supply is abnormal.

Description

technical field [0001] The present disclosure generally relates to electric power steering systems, and vehicle control systems including such electric power steering systems. Background technique [0002] In a conventional electric power steering apparatus, a controller and an electric motor for assisting steering torque are used in combination for simplifying the driver's steering operation, that is, for assisting the driver's operation of the steering wheel. Since the steering device controls the steering function of the vehicle, which is a basic and critical function of the vehicle, the reliability of the steering device should be improved by system redundancy or the like. [0003] For example, the power steering device disclosed in the patent document—Japanese Patent Document JP2013-215040A (Patent Document 1)—has a combination of multiple sets of windings and an inverter, that is, one winding group with multiple winding wires of the motor and one Inverters are paired,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04H02J9/06
CPCB62D5/0403B62D5/046H02P25/22H02P29/025H02P29/032B60R16/03
Inventor 山崎雅志
Owner DENSO CORP
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