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Exterior motor-driven exhaust gas recirculation (EGR) overcurrent protection system and control method thereof

A current overload and protection system technology, applied in electrical control, engine control, fuel injection control and other directions, can solve the problems of unreasonable design, large driving force, poor driving response ability, etc., to achieve low production cost and maintenance cost, overcome the The effect of poor driving responsiveness and simple overall structure

Active Publication Date: 2013-05-08
常州易控汽车电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the unreasonable design of the current EGR system, and the poor driving response ability, inability to generate large driving force and low effective time when using a two-stage driving current limiting peak protection algorithm or a single driving current peak protection algorithm to provide an external electric EGR current overload protection system with a reasonable design that can effectively overcome the above defects

Method used

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  • Exterior motor-driven exhaust gas recirculation (EGR) overcurrent protection system and control method thereof
  • Exterior motor-driven exhaust gas recirculation (EGR) overcurrent protection system and control method thereof
  • Exterior motor-driven exhaust gas recirculation (EGR) overcurrent protection system and control method thereof

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Embodiment

[0034] figure 1 , 2 As shown, the external electric EGR current overload protection system of the present invention includes an EGR system 1 for exhaust gas recirculation, an EGR position control module 2 connected with the engine management module 5, and a current overload protection system connected with the EGR position control module 2 A control module 3, and an EGR drive circuit 4 connected to the current overload protection control module 3.

[0035] Among them, the EGR system 1 is a commonly used technology at present, which includes a valve seat adjustment system, a valve seat position sensor for real-time monitoring of the actual opening and closing of the valve seat, and a drive motor connected with the valve seat adjustment system for adjusting the lift of the valve seat . During operation, the valve seat position sensor monitors the actual opening of the valve seat in real time, and provides it to the engine management module 5 in the form of an electrical signal...

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Abstract

The invention discloses an exterior motor-driven exhaust gas recirculation (EGR) overcurrent protection system which is characterized by comprising an EGR system (1), an overcurrent protection control module (3) and an EGR drive circuit (4), wherein the EGR system (1) is internally provided with an EGR position control module (2), the overcurrent protection control module (3) is connected with the EGR position control module (2), and the EGR drive circuit (4) is connected with the overcurrent protection control module (3). The EGR position control module (2) is connected with an engine management module (5). On the premise of guaranteeing thermal load safety, drive capability of a drive engine is fully played, and the drive capability can be switched over at any time according to a practical thermal load state to ensure that the drive engine can safely and fast recover to a high-peak power limiting state.

Description

technical field [0001] The invention belongs to the field of electronically controlled engine control systems, in particular to an external electric EGR current overload protection system and a control method thereof. Background technique [0002] At present, in the face of the pressure of environmental degradation and the continuous upgrading of mandatory emission regulations, the emission limit value is also continuously reduced. In order to effectively reduce emissions, diesel engines use a variety of exhaust after-treatment technologies. EGR (Exhaust Gas Recirculation, exhaust gas recirculation technology) is one of them. In EGR technology, in order to reduce the NOx emission of the engine, the EGR system will mix the exhaust gas after combustion into the fresh air. Since the NOx generation condition is high temperature and rich oxygen, the EGR system can suppress the NOx generation from the following two aspects. On the one hand, the introduction of exhaust gas incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D21/08F02D41/22
Inventor 张科勋郝守刚李中褚全红白思春
Owner 常州易控汽车电子股份有限公司
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