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Double-speed fan abnormity diagnosis system and method

An abnormal diagnosis and fan technology, applied in circuit breaker testing, pump control, non-variable-capacity pumps, etc., can solve problems such as whether the relay is stuck or the switch is in poor contact, no output, etc., to improve fuel economy, The effect of increasing reliability and reducing heat loss

Active Publication Date: 2021-03-02
JIANGXI CHANGHE AUTO
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a two-speed fan abnormality diagnosis system, which solves the problem of inability to check whether the relay that controls the low-speed operation is stuck or the switch is in poor contact when the current automobile cooling fan is running at low speed. The problem of detecting the output situation

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  • Double-speed fan abnormity diagnosis system and method

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 A kind of two-speed fan abnormal diagnosis system shown is characterized in that, comprises power supply module 1, MCU single-chip microcomputer 2, diagnosis module 3, alarm module 4 and fan motor 5, and described power supply module 1 is used for keeping MCU single-chip microcomputer 2, diagnosis The power supply of module 3, alarm module 4 and fan motor 5, electrical connection between described MCU single-chip microcomputer 2, diagnosis module 3, alarm module 4 and fan motor 5; Described alarm module 4 is provided with a sound and light alarm 41 , the sound and light alarm 41 is electrically connected with the MCU single-chip microcomputer 2; the fan normal information is entered in the MCU single-chip microcomputer 2.

[0025] The diagnosis module 3 is connected with a first relay 31, a second relay 32 and a third relay 33, the fi...

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Abstract

The invention discloses a double-speed fan abnormity diagnosis system which is characterized by comprising a power supply module, an MCU single-chip microcomputer, a diagnosis module, an alarm moduleand a fan motor. The power supply module is used for keeping power supplies of the MCU single-chip microcomputer, the diagnosis module, the alarm module and the fan motor, and the MCU single-chip microcomputer, the diagnosis module, the alarm module and the fan motor are electrically connected. The alarm module is provided with an audible and visual alarm, and the audible and visual alarm is electrically connected with the MCU single-chip microcomputer. The MCU single-chip microcomputer inputs normal information of a fan. According to the double-speed fan abnormity diagnosis system, the problem that when an existing automobile cooling fan operates at a low speed, whether a relay controlling low-speed operation is bonded or not or whether a switch is in poor contact and consequently no output is caused cannot be detected is solved.

Description

technical field [0001] The invention relates to the technical field of automobile fan diagnosis, in particular to a two-speed fan abnormality diagnosis system and a diagnosis method thereof. Background technique [0002] The current general-purpose automotive cooling fan is a single-motor single-winding fan. In order to save fuel consumption and meet the requirements for cooling air volume in different working conditions, a current-limiting resistor is usually added to the input end of the cooling fan to achieve high-speed and low-speed operation of the cooling fan. speed. The relevant circuit principle is that the coil power supply of the low-speed relay is connected to the thermal power, the coil control is connected to the control terminal of the C of the ECU single-chip microcomputer, the switch input is connected to the thermal power, and the switch output is connected to the input terminal of the low-speed fan; the coil power supply of the high-speed relay is connected...

Claims

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Application Information

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IPC IPC(8): F04D27/00G01R31/327
CPCF04D27/001F04D27/008G01R31/327
Inventor 陈兴文李兆燕咸奎喜洪耀东洪贵钟
Owner JIANGXI CHANGHE AUTO
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