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Vehicle speed signal acquisition device and electric power steering system

A technology of electric power steering and signal acquisition, which is applied to electric steering mechanisms, automatic steering control components, steering mechanisms, etc., can solve problems such as misjudgment of receiving circuits and risks brought by steering operations, and achieve improved reliability, low cost, and design simple effects

Active Publication Date: 2015-11-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the vehicle speed signal line is abnormal, for example, when the line is suspended due to a broken signal line or a poor contact of the connector, it may cause a misjudgment by the receiving circuit, resulting in the vehicle state being judged as a parking state when the signal line is suspended.
Since the steering operation characteristic curves designed by the electric power steering system are quite different under different vehicle speed states, the misjudgment of the vehicle speed state may bring risks to the steering operation

Method used

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  • Vehicle speed signal acquisition device and electric power steering system
  • Vehicle speed signal acquisition device and electric power steering system
  • Vehicle speed signal acquisition device and electric power steering system

Examples

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Embodiment Construction

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0022] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides a vehicle speed signal collection device and an electric power steering system. The vehicle speed signal collection device comprises a first vehicle speed signal processing module, a second vehicle speed signal processing module and a control module, wherein the control module is respectively connected with the first vehicle speed signal processing module and the second vehicle speed signal processing module, and the control module is used for controlling the first vehicle speed signal processing module and the second vehicle speed signal processing module according to vehicle speed signals. In the embodiment of the invention, whether the vehicle signals are in no switching-in states or not can be judged through the control of the first vehicle speed signal processing module and the second vehicle speed signal processing module by the control module, thus the situation that no switching-in states of the vehicle speed signals during high-speed running are treated by being regarded as zero vehicle speed states by mistake can be prevented when electric power is calculated, and serious potential safety hazard is prevented from happening during the running of a vehicle.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a vehicle speed signal acquisition device and an electric power steering system. Background technique [0002] The vehicle speed signal is an important driving status signal required by the electric power steering system. Due to the different resistances that the vehicle needs to overcome when turning at different vehicle speeds, and the steering operation characteristic curves designed by the electric power steering system are also quite different under different vehicle speeds, the electric power steering system needs to collect the vehicle speed signal to calculate its The corresponding actual speed of the vehicle. [0003] When the vehicle is running, the vehicle speed signal should normally be a low frequency square wave signal. And when the vehicle stops, the speed signal should normally be a continuous level of 0V or 12V. When the vehicle speed signal l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D6/02
Inventor 陈礼王超陆立标王健
Owner BYD CO LTD
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