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Abnormality determination device for rotation sensor

A technology of rotation sensor and abnormal judgment, which is applied in the direction of transmitting sensing components, instruments, machines/engines, etc. by using electric/magnetic devices, and can solve problems such as the inability to detect the rotation angle of the output shaft of the internal combustion engine

Inactive Publication Date: 2012-09-12
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned rotation sensor, for example, when an abnormality occurs such as a disconnection of the signal line for transmitting the pulse signal, it becomes impossible to detect the rotation angle of the output shaft of the internal combustion engine.

Method used

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  • Abnormality determination device for rotation sensor
  • Abnormality determination device for rotation sensor
  • Abnormality determination device for rotation sensor

Examples

Experimental program
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Embodiment Construction

[0046] Next, an embodiment in which the present invention is embodied will be described. exist figure 1 3 shows a schematic configuration of a vehicle including the abnormality determination device of the rotation sensor 40 according to the present embodiment.

[0047] Such as figure 1 As shown, an internal combustion engine 11 as a drive source is mounted on a vehicle 10 . A drive wheel 14 is connected to a crankshaft 12 serving as an output shaft (rotary body) of the internal combustion engine 11 via an automatic transmission 13 . Further, power generated by the internal combustion engine 11 is transmitted to drive wheels 14 via the automatic transmission 13 .

[0048] A starter motor 17 is connected to the crankshaft 12 . The starter motor 17 functions as an electric motor when the internal combustion engine 11 is started or when the internal combustion engine 11 is automatically started by operating a drive switch (not shown) performed by the occupant. Specifically,...

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PUM

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Abstract

Provided is an abnormality determination device for a rotation sensor for detecting the rotation of a crankshaft. The rotation sensor comprises a sub sensor and a main sensor each of which outputs a pulsed signal every time the rotation body rotates by a predetermined angle. The rotation sensor is configured to, when the condition that the output signal of the sub sensor has a predetermined value and the output signal of the main sensor has changed is met, output a pulse signal in a different output form according to the direction of change of the output signal of the main sensor when the condition is met. The abnormality determination device is provided with an electronic controller which determines that the rotation sensor is abnormal on the basis of the fact that the output form of one pulse signal and the output form of the other pulse signal of two pulse signals outputted continuously from the rotation sensor within a determination period in which the crankshaft rotates in only a predetermined direction are different.

Description

technical field [0001] The present invention relates to an abnormality judging device for judging occurrence of abnormality of a rotation sensor that outputs a pulse signal corresponding to the rotation direction of a rotating body every time a rotating body rotates by a predetermined angle. Background technique [0002] In recent years, technologies such as hybrid vehicles equipped with internal combustion engines and electric motors as vehicle drive sources, and vehicles at intersections and the like have been proposed and put into practical use in order to reduce fuel consumption and exhaust emissions. Such as a vehicle that temporarily stops the operation of the internal combustion engine when the vehicle is stopped, a technology that performs control (automatic stop and restart control) that intermittently stops the operation of the internal combustion engine while the vehicle is running. In such a vehicle, by accurately grasping the rotation angle of the output shaft o...

Claims

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Application Information

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IPC IPC(8): G01D5/244F02D45/00
CPCF02D41/009F02D41/062F02D2041/227G05B23/0237
Inventor 内田晶人中村良文吉原正朝枡田哲
Owner TOYOTA JIDOSHA KK
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