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Engine throttle position sensing method and sensor

A technology of throttle position and sensing method, which is applied in the field of position sensing to achieve the effect of eliminating the influence of factors such as the environment, improving accuracy and high resolution

Inactive Publication Date: 2009-02-11
CHONGQING RUIYANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the respective advantages and disadvantages of the three types of throttle position sensors with different principles common in the market at present, and proposes an internal non-contact throttle position sensing method and sensor based on the principle of parallel plate adjustable capacitance

Method used

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  • Engine throttle position sensing method and sensor
  • Engine throttle position sensing method and sensor
  • Engine throttle position sensing method and sensor

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Experimental program
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Embodiment Construction

[0047] see image 3 and Figure 4 , The automobile engine throttle position sensor is composed of a measuring capacitor, a reference compensation capacitor and a processing circuit. Measuring capacitor 1 is an adjustable parallel plate capacitor. In order to facilitate circuit processing, a fan-shaped plate dielectric can be used, such as figure 2 As shown, the inner and outer ring radii of the two fan-shaped plate dielectrics are the same. One pole plate 1A of the measurement capacitor 1 is fixedly connected with the throttle shaft 3 and rotates coaxially with the throttle valve 4, and the other pole plate 1B is fixedly installed in the capacitor housing base 5 fixed on the throttle body 6, two pieces The pole plates are installed coaxially and keep the axial distance constant. The reference compensation capacitor 2 is a parallel plate capacitor whose capacitance value is constant during normal operation, and its capacitance value is equal to or has a certain proportional...

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Abstract

The invention relates to a sensing method of engine's throttle plate place .It uses two parallel plate capacitor separately used as measure capacitance and reference compensation capacitor .One wafer of the measure capacitance is fixed connected to throttle plate's rotating shaft , the other wafer is fixed installed on the shell matrix of the capacitance on the throttle plate , and two wafers keep the same distance in axial direction .Two wafers forming the capacitance's effective area changes with the jaw opening of the throttle plate .The reference compensation capacitor and the measure capacitor are installed in the same environment ,and the former capacitor compensates the latter one gain accurate change value of the measure capacitor .Measure the linear relationship between the changing value and rotating angle of capacitor , through circuit processing ,then obtain the accurate angle of unlocking the throttle plate to realize the measurement of the place of throttle plate .The invention can realize high resolution and high degree of accuracy measurement under large scale , and it's useful to extend the sensor's useful time .Its structure is simple ,and it is inexpensive ,the requirement of its craft is not high .

Description

technical field [0001] The invention relates to the position sensing technology, in particular to the position sensing of the throttle opening degree of engines such as automobiles and motorcycles. Background technique [0002] Engine throttle position sensor is an important sensor for electronic throttle and automotive EFI system. It can transmit the throttle position signal to the engine management system ECM in time, so that the ECM can correctly know the throttle opening and the change of the throttle opening during the driving process of the car. According to the obtained throttle signal, the ECM can accurately determine the amount of fuel supply or adjust the opening of the throttle according to the running conditions and working conditions of the vehicle. It can be seen that the throttle position sensor is one of the key components of the electronic fuel injection system and electronic throttle of the car. Its normal and stable work can make the car obtain good power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/241
Inventor 昝昕武
Owner CHONGQING RUIYANG TECH DEV
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