# US 5,699,874 A · Electric power steering apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,699,874 A
- Document ID: US5699874A
- Status: Granted
- Kind: A
- Application number: 08/592,836
- Filed: 1995-12-29
- Granted: 1997-12-23
- Earliest claimed: 1995-01-11
- Assignees: Nsk Ltd.
- Inventors: Yasuhiko Miyaura
- Web page: https://patentgrep.com/patent/US5699874A

## CPC

- B62D 6/10: characterised by means for sensing {or determining} torque
- B62D 5/049: {detecting sensor failures}
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

In an electric power steering apparatus including a steering torque detector for detecting steering torque of a steering system, an electric motor for generating steering auxiliary force with respect to the steering system, and a control apparatus for controlling the steering auxiliary force generated by the electric motor in response to the torque detected by the steering torque detector, the electric power steering apparatus includes lines, at least one portion of which are arranged in parallel to each other, for electrically connecting the steering torque detector to the control apparatus; and a contact part having detachable contact portions separately inserted into the respective parallel portions of the lines.

## Claims

### Claim 1

An electric power steering apparatus, comprising:
a steering torque detector for detecting a steering torque of a steering system;
an electric motor for generating a steering auxiliary force to the steering system;
a control apparatus for controlling the steering auxiliary force generated by said electric motor in response to the steering torque detected by said steering torque detector;
first lines for electrically connecting said steering torque detector to said control apparatus, at least one of said first lines being connected to a second line in parallel; and
a contact part having detachable contact portions separately disposed in each of said first lines and said second line, said detachable contact portion disposed in said one of said first lines being positioned between two points where said one of said first lines is connected to said second line.

### Claim 2 (depends on 1)

An electric power steering apparatus as claimed in claim 1, wherein said one of said first lines is designed to transmit a detection signal produced by said steering torque detector.

### Claim 3 (depends on 2)

An electric power steering apparatus as claimed in claim 2, wherein said one of said first lines is grounded through a first resistor and is also connected to a power supply line through a second resistor in said control apparatus.