NON-CONTACT SENSOR DEVICE FOR ELECTRIC THROTTLE

Abstract

This invention is related to a non-contact sensor device for electric throttle, comprising a body and a cover. A drive assembly is set in the body and has a shaft corresponded to the on/off state of a throttle valve. An adaptor is installed on the shaft, and a magnet element is set on the adaptor. A Hall element is set on the cover to correspond to the magnet element for detecting the rotation angle of the shaft, thereby knowing the air inflow value and the open angle of the throttle valve to control the fuel injection of fuel-air mixture.

Claims

1. A non-contact sensor device for an electric throttle, comprising: a cover, and a body, covered by the cover, the body comprising: a drive assembly, set in the body and formed with a shaft corresponded to the on/off state of a throttle valve ; and a sensor device, set on the shaft for detecting the on/off state of the throttle valve, the sensor device comprising: an adaptor, installed on the shaft; a magnet element with N-S pole, set on the top surface of the adapter; and a Hall element, set on the cover and corresponded to the magnet element to form a non-contact response for detecting the on/off state of the throttle valve.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a partial exploded view of a non-contact sensor device for electric throttle according to an embodiment of the present invention;

[0014] FIG. 2 is an assembled view of a non-contact sensor device for electric throttle according to an embodiment of the present invention;

[0015] FIG. 3 is a sectional view of a non-contact sensor device for is electric throttle according to an embodiment of the present invention; and

[0016] FIG. 4 is a top view of a non-contact sensor device for electric throttle according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Please refer to FIG. 1 to FIG. 3, which are a partial exploded view, an assembled view, and a sectional view of a non-contact sensor device for electric throttle according to an embodiment of the present invention, respectively. The non-contact sensor device for electric throttle comprises a body 1 and a cover 2 for covering on the body 1. A drive assembly 11 is set in the body 1 and formed with a shaft 111 which is correspond to the on/off state of a throttle valve 112. A sensor device 3 is set on the shaft 111 for detecting the on/off state of the throttle valve 112.

[0018] The sensor device 3 comprises an adaptor 31 installed on the shaft 111, a magnet element 311 with N-S pole set on the top surface of the adapter 31, and a Hall element 32 set on the cover 2 and corresponded to the magnet element 311 to form a non-contact response for detecting the on/off state of the throttle valve 112.

[0019] Please refer to FIG. 1 to FIG. 4. When the non-contact sensor device for electric throttle is assembled, the body 1 is assembled at one side of the engine A, and the drive assembly 11 is set in the body 1. The structure of the drive assembly 11 is not the characteristics of the present invention, it is not described here. The adaptor 31 is installed on the shaft 111 of the drive assembly 11, and the magnet element 311 is set on the top surface of the adaptor 31. The Hall element 32 is set on the cover 2 and corresponded to the magnet element 311.

[0020] When the driver presses the accelerator pedal, the drive assembly 11 drives the shaft 111 rotate to open the throttle valve 112, wherein the open angle of the throttle valve 112 impacts on the amount of air inflow and the fuel injection. Therefore, the rotated angle is detected by the Hall element 32 corresponded to the magnet element 311 on the adaptor 31, so the open angle of the throttle valve 112 and the amount of the air inflow is known by the property of the Hall element 32 which transforms the change of the magnetic field to the change of the output voltage, thereby controlling the fuel injection of fuel-air mixture.

[0021] According to the above description and embodiments, the non-contact sensor device for electric throttle of the present invention has the advantages as following:

[0022] 1. In the non-contact sensor device for electric throttle of the present invention, the non-contact detection is via the magnet element on the adaptor coupled to the Hall element, thereby elongating the use life of the non-contact sensor device for electric throttle of the present invention.

[0023] 2. The non-contact sensor device for electric throttle of the present invention is assembled easily and detects accurately.