Early fault detection for an EPS system

A technology of electronic power and steering system, which is applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc., and can solve the problems of short circuit or freezing, reduction, and failure performance of the steering component circuit

Inactive Publication Date: 2016-03-23
GM GLOBAL TECH OPERATIONS LLC
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Problems solved by technology

Over time, excess moisture can potentially short or freeze the electrical circ...

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  • Early fault detection for an EPS system
  • Early fault detection for an EPS system
  • Early fault detection for an EPS system

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[0053]The following detailed description is merely exemplary in nature and not intended to limit application and use. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description.

[0054] In this document, relative terms such as first and second may only be used to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship between these entities or actions. relationship or sequence. Numerical ordinals such as "first," "second," "third," etc. simply denote different individuals of a plurality and do not imply any order or sequence unless specifically defined by the claim language.

[0055] Additionally, the following description refers to elements or features being "connected" or "coupled" together. As used herein, "connected" may mean that one element / feature is directly joined to (or direc...

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Abstract

The present invention relates to early fault detection for an EPS system, and provides a method and an apparatus for an improved system for early detection of a fault in an EPS system for a vehicle. The apparatus includes a steering gear assembly including a temperature sensor and a pressure sensor for sensing within the steering gear assembly. A controller determines a relationship between the temperature value and the pressure value, and also determines whether the relationship is within a threshold of a reference relationship. The controller can provide an indication or message on a display when the relationship is not within the threshold of the reference relationship. The method includes monitoring a temperature and a pressure associated with an electronic power steering system for a vehicle during operation of the vehicle and determining a relationship between the temperature and the pressure. A fault indication or message is presented on a display when the relationship exceeds a threshold value from a reference relationship.

Description

technical field [0001] The technical field relates generally to electronic power steering (EPS) systems for vehicles, and more particularly to improved systems and methods for early detection of faults in EPS systems of vehicles. Background technique [0002] Electronic power steering (EPS) systems include several mechanical and electronic components to assist the vehicle operator in steering maneuvers. One mechanical component important to the operation of the EPS system is the bellows that provide a flexible seal between the steering gear assembly and the tie rods. If the bellows are damaged or cracked due to age, moisture can enter the steering gear assembly. Over time, excess moisture can potentially short or freeze the electrical circuits within the steering gear assembly, causing it to fail or reduce performance. [0003] Therefore, it is desirable to provide early detection of any rupture in the bellows of the EPS. Furthermore, it is desirable to notify the vehicle...

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Application Information

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IPC IPC(8): B62D5/04
CPCB62D5/0481F16J3/041F16J15/3296B62D5/0496
Inventor J.B.西塞罗R.J.特鲁比亚尼
Owner GM GLOBAL TECH OPERATIONS LLC
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