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Crankshaft, transmission or camshaft sensor, diagnosis system and method implementing such a sensor

A crankshaft sensor and sensor technology, applied in the sensor field, can solve problems such as poor operation

Pending Publication Date: 2020-07-03
CONTINENTAL AUTOMOTIVE GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Currently, there are no crankshaft sensors, camshaft sensors or gearbox sensors 10' that allow the motor control unit 30' to detect and identify whether the fault is due to the sensor 10' or to the cable 20' connecting the sensor 10' to the motor control unit 30' poor performance

Method used

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  • Crankshaft, transmission or camshaft sensor, diagnosis system and method implementing such a sensor
  • Crankshaft, transmission or camshaft sensor, diagnosis system and method implementing such a sensor
  • Crankshaft, transmission or camshaft sensor, diagnosis system and method implementing such a sensor

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Embodiment Construction

[0046] In the remainder of the description we take, by way of example and not in a limiting manner, the case of a crankshaft sensor 10 of a motor vehicle. It should be noted, however, that the invention is also applicable to other types of sensors that operate in a similar manner to crankshaft sensors, such as gearbox sensors or camshaft sensors. More generally, the invention can also be applied to other sensors not belonging to the field of motor vehicles.

[0047] A use case is also assumed in which it is considered that the sensor 10 should be active, in other words the normal case where power is not intentionally supplied to the sensor 10 via the motor control unit 30 is of no interest.

[0048] In the rest of the description, an "open circuit" of an electrical component is understood to mean that a part of the component is not connected to any other electrical component, and thus no current flows through the component. A "short circuit" of one element to another is under...

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Abstract

The invention relates to a crankshaft, transmission or camshaft sensor (10) for a motor vehicle, intended for being connected to an engine control unit (30) by a cable (20). The sensor comprises a processing module (17) and a voltage-modifying circuit (18) configured to generate an output signal via an output port (12) of the sensor (10) allowing a diagnosis module (36) of the engine control unit(30) to detect and identify faults of the sensor (10) or the cable (20). In particular, the processing module (17) is configured to provide on its output port (172), when the toothed target (14) is immobile, a predetermined pattern representing the fact that the toothed target (14) is immobile, this predetermined pattern corresponding to a status change of the output port (172) of the processing module (17) with a predetermined time and repeated periodically. The invention likewise relates to a diagnosis system (1) comprising such a sensor (10), a cable (20) and an engine control unit (30). The invention also relates to a diagnosis method (50) implemented by said diagnosis system (1).

Description

technical field [0001] The invention belongs to the field of sensors for motor vehicles, and more particularly relates to crankshaft sensors, gearbox sensors or camshaft sensors. The invention also relates to a system comprising such a sensor and a motor control unit connected to said sensor by a cable, and which implements a diagnostic method suitable for detecting and identifying faults of the sensor or of the cable. Background technique [0002] Crankshaft sensors are used in motor vehicles to determine the angular position and / or rotational speed of a crankshaft of a motor of the motor vehicle. [0003] figure 1 Such a crankshaft sensor 10 ′ is shown schematically. It comprises a target 14' (mounted on the crankshaft) and a measurement unit 15' (such as a Hall effect unit or a magnetoresistive unit) which provides a raw signal representative of the magnetic field strength at said measurement unit 15'. exist figure 1 In the example shown, the magnetic field measured b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/244G01D5/245
CPCG01D5/24457G01D5/2457F02D41/009G07C5/0808
Inventor M-N.拉吕M.汉努基B.马科纳托
Owner CONTINENTAL AUTOMOTIVE GMBH