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High Speed ​​Fuel Injector Drive Circuit with Fault Diagnosis and Its Judgment Method

A driving circuit, fault judgment technology, applied in circuit devices, machines/engines, emergency protection circuit devices, etc., can solve the problems of severe driving circuit current, fuel injector and driving circuit failure, etc., and achieve the effect of rapid response

Active Publication Date: 2021-04-20
CHONGQING HONGJIANG MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the huge injection energy of the diesel engine during use, there are very strict requirements on the current of the drive circuit, and it is easy to cause the failure of the injector and the drive circuit

Method used

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  • High Speed ​​Fuel Injector Drive Circuit with Fault Diagnosis and Its Judgment Method
  • High Speed ​​Fuel Injector Drive Circuit with Fault Diagnosis and Its Judgment Method
  • High Speed ​​Fuel Injector Drive Circuit with Fault Diagnosis and Its Judgment Method

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, this technology is further described:

[0039] In this embodiment, a high-speed injector drive circuit with fault diagnosis includes CPU1, high-end drive circuit 2, low-end drive circuit 3, injector switch circuit 4, circuit sampling circuit 5, and comparison circuit 6. Such as figure 1 As shown, the high-end drive circuit 2, low-end drive circuit 3, current sampling circuit 5 and comparison circuit 6 are electrically connected to CPU1 respectively; the fuel injector switch circuit 4 is connected to the high-end drive circuit 2 and the low-end drive circuit 3 respectively. It is electrically connected with the current sampling circuit 5.

[0040] In this embodiment, the CPU 1 is selected to have a high-speed sampling channel and have a multi-core or a co-processor to meet the fast sampling of independent current sampling. For example: Infineon's TC1797 chip.

[0041] In this embodiment, the high-end drive circuit includ...

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Abstract

The invention discloses a high-speed fuel injector drive circuit with fault diagnosis and a judgment method, which includes a CPU, a high-end drive circuit, a low-end drive circuit, a fuel injector switch circuit, a circuit sampling circuit and a comparison circuit; the high-end drive The electric circuit, the low-end driving circuit, the current sampling circuit and the comparison circuit are respectively electrically connected to the CPU; the fuel injector switch circuit is electrically connected to the high-end driving circuit, the low-end driving circuit and the current sampling circuit respectively. The invention not only has the function of controlling the fuel injector, but also has the function of judging its fault.

Description

technical field [0001] The invention relates to the technical field of a driving circuit of a fuel injector of a diesel engine fuel system, in particular to a driving circuit of a high-speed fuel injector with fault diagnosis and a judgment method. Background technique [0002] In vehicle and marine diesel engine fuel systems, high-speed injectors are usually used as the key components of the actuator of the fuel injection system. If the drive of the fuel injector fails, it will directly affect the normal operation of the diesel engine, even damage the diesel engine and affect the safety of driving and boating. Therefore, the drive circuit of the high-speed fuel injector needs to have high Diagnose in time and take relevant actions to avoid damage to the diesel engine. Due to the huge injection energy of the diesel engine during use, there are very strict requirements on the current of the drive circuit, and it is easy to cause the failure of the injector and the drive circ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M65/00F02D41/20H02H3/087
CPCF02D41/20F02D2041/2086F02D2041/2093F02M51/06F02M65/00H02H3/087
Inventor 桑印李鹏豪周琴王文成张永林曹钰吴竞张朦朦
Owner CHONGQING HONGJIANG MACHINERY CO LTD