Novel EGR cooler

An EGR cooler, cooler technology, applied in the direction of machine/engine, engine components, exhaust gas recirculation, etc., can solve the high frequency of EGR valve and cooler failure, affecting the working stability of the engine exhaust after-treatment system, the cooler and the cooler. EGR valve carbon deposition, coking and other problems, to achieve the effect of high precision flow control, strong versatility, and degraded carbon deposition

Pending Publication Date: 2021-10-01
无锡同益汽车动力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The principle of the exhaust gas recirculation system is to mix a part of the high-temperature exhaust gas discharged from the engine with the fresh air filtered by the air after cooling, and then introduce it into the intake system for re-combustion, so as to improve the combustion performance and reduce the generation of NOx and waste in the engine exhaust gas. Emission is the most commonly used technical line for light-duty engines in China VI, but the EGR valve and cooler failure frequency is too high, which is also a relatively common problem at present. In order to improve the above situation, a flow control water valve can be added in front of the EGR cooler. Improve the overall performance and reliability of the EGR module
[0003] The EGR cooler is a very important part of the engine aftertreatment system. The design and development is based on the engine exhaust temperature requirements at rated speed and rated torque as the design input. However, in the actual use of the vehicle, due to different loads and road conditions, etc., There will be a variety of working conditions in the low-speed and low-load area. Since the EGR cooler is a structure with linear physical characteristics, if the temperature after rated cooling is low, the temperature in the low-speed and low-load area will be lower, and it is very easy for the cooler and EGR valve to appear. Carbon deposition and coking problems, which affect the engine emissions and the stability of the entire after-treatment system

Method used

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Embodiment 1

[0025] Such as Figure 1-2 As shown, this embodiment provides a novel EGR cooler, including an EGR cooler assembly, an electric EGR valve assembly, a temperature feedback assembly and a coolant flow adjustment assembly;

[0026] The electric EGR valve assembly includes an EGR valve 201 and a valve seat 202. The valve seat 202 is made of aluminum, which is light in weight and light in weight. Cast aluminum material can be selected to save costs. The valve seat 202 includes a cooler interface 203, a valve body The interface 204 and the exhaust gas outlet interface 205, the valve body 201 is fixed to the valve seat 202 through the valve body interface 204, and the cooler interface 203 and the exhaust gas outlet 105 are fixed by bolts, and the exhaust gas outlet interface 205 communicates with the EGR pipe on the engine, The exhaust gas outlet port 205 is set at the lowest point of the air flow on the valve seat 202, so that the condensed water can be drained, the formation of car...

Embodiment 2

[0040] The coolant flow regulating assembly includes an electronic water pump, a connecting pipe 405 is fixedly connected between the electronic water pump and the liquid inlet pipe 104, and a flow regulating valve controlled by the engine ECU3 is arranged on the electronic water pump.

[0041] The difference from Embodiment 1 is that the electronic water pump is used to control the coolant flow rate of the electronic water pump through the signal sent to the engine ECU3 by the temperature sensor 502 (or the nitrogen oxide content detected by the emission detection system), so as to realize the control of the EGR system. The control of the cooling capacity, when the recirculation exhaust gas temperature is higher than the actual demand temperature, adjust the electronic water pump, increase the coolant flow rate, and enhance its cooling capacity; when the recirculation exhaust gas temperature is lower than the actual demand temperature, adjust the electronic water pump to reduce...

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Abstract

The invention discloses a novel EGR cooler. The novel EGR cooler comprises an EGR cooler component, an electric EGR valve module, a temperature feedback component and a coolant flow adjusting component, wherein the EGR cooler component comprises an EGR cooler body, and the EGR cooler body comprises a water inlet pipe, a water outlet pipe, a waste gas inlet and a waste gas outlet. According to the novel EGR cooler, a flow control water valve is arranged before cooling liquid of the EGR cooler body enters, meanwhile, a temperature sensor is arranged on a valve seat, and waste gas temperature data signals are fed back to an engine ECU in time, so that the flow of the flow control water valve is controlled according to the waste gas temperature, and the flow control precision is high; the temperature of cooled waste gas is controlled within a relatively constant area range, formation of carbon deposition and coking can be effectively degraded, and the use durability and reliability of the EGR valve module and the EGR cooler component are improved; and continuous adjustment and optimization can be achieved at different working condition points by adjusting the temperature controlled by the engine ECU.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a novel EGR cooler. Background technique [0002] The principle of the exhaust gas recirculation system is to mix a part of the high-temperature exhaust gas discharged from the engine with the fresh air filtered by the air after cooling, and then introduce it into the intake system for re-combustion, so as to improve the combustion performance and reduce the generation of NOx and waste in the engine exhaust gas. Emission is the most commonly used technical line for light-duty engines in China VI, but the EGR valve and cooler failure frequency is too high, which is also a relatively common problem at present. In order to improve the above situation, a flow control water valve can be added in front of the EGR cooler. Improve the overall performance and reliability of the EGR module. [0003] The EGR cooler is a very important part of the engine aftertreatment system. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M26/30F02M26/33F02M26/47
CPCF02M26/30F02M26/33F02M26/47
Inventor 陆强肖非武赵亚茹冯志文肖泫岑
Owner 无锡同益汽车动力技术有限公司
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