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Engine EGR system and diagnosis method thereof

A diagnostic method and engine technology, applied to engine components, machines/engines, charging systems, etc., can solve problems such as high difficulty coefficient and high detection cost

Pending Publication Date: 2022-03-29
深圳臻宇新能源动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes an engine EGR system, which can quickly determine whether the EGR pipeline is blocked, the detection is simple and the cost is low, and the technical problem of high detection cost and high difficulty coefficient in the prior art is solved

Method used

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  • Engine EGR system and diagnosis method thereof
  • Engine EGR system and diagnosis method thereof
  • Engine EGR system and diagnosis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] An engine EGR system 100, such as figure 1 As shown, it includes: an EGR pipeline 1 , a first temperature sensor 2 , an intake manifold 3 and a second temperature sensor 4 .

[0087] Among them, such as figure 1 As shown, the EGR pipeline 1 is provided with an EGR cooler 11 and an EGR valve 12 .

[0088] like figure 1 As shown, the first temperature sensor 2 is connected to the EGR pipeline 1 after the outlet of the EGR valve 12 to detect the exhaust gas temperature at the outlet end of the EGR valve 12 .

[0089] The intake manifold 3 is connected to the EGR pipeline 1 .

[0090] The second temperature sensor 4 is connected to the intake manifold 3 to detect the temperature of the intake manifold 3 .

Embodiment 2

[0092] An engine EGR system 100, different from Embodiment 1, on the basis of Embodiment 1, such as figure 1 As shown, the intake manifold 3 is provided with an inlet 31 to connect the outlet end of the EGR pipeline 1 , and the second temperature sensor 4 is provided on the intake manifold 3 away from the inlet 31 .

[0093] like figure 2 As shown, the EGR pipeline 1 is provided with an installation boss 13 , the installation boss 13 is arranged close to the intake manifold 3 , and the first temperature sensor 2 is connected to the installation boss 13 .

Embodiment 3

[0095] An engine EGR system 100 is different from Embodiment 2 in that on the basis of Embodiment 2, the engine EGR system 100 further includes a controller (not shown in the figure), and the controller communicates with the first temperature sensor 2 and the second temperature sensor 2 respectively. Two temperature sensors 4 are electrically connected, the first temperature sensor 2 transmits the measured exhaust gas temperature as the first temperature value to the controller, and the second temperature sensor 4 uses the measured temperature of the intake manifold 3 as the second temperature value It is transmitted to the controller, and the controller judges whether the EGR pipeline 1 is blocked according to the difference between the first temperature value and the second temperature value.

[0096] The engine EGR system 100 also includes an alarm, which is electrically connected to the controller. When the difference between the first temperature value and the second tempe...

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Abstract

The invention discloses an engine EGR (Exhaust Gas Recirculation) system and a diagnosis method thereof, and the engine EGR system comprises an EGR pipeline, a first temperature sensor, an intake manifold and a second temperature sensor. An EGR cooler and an EGR valve are arranged on the EGR pipeline, the first temperature sensor is connected to the EGR pipeline behind an outlet of the EGR valve so as to detect the temperature of waste gas at the gas outlet end of the EGR valve, the gas inlet manifold is connected with the EGR pipeline, and the second temperature sensor is connected to the gas inlet manifold so as to detect the temperature of the gas inlet manifold. According to the engine EGR system, whether the EGR pipeline is blocked or not can be directly judged according to the exhaust gas temperature, detected by the first temperature sensor, of the gas outlet end of the EGR valve and the temperature, detected by the second temperature sensor, of the gas inlet manifold, detection is simple, implementation is easy, and the detection cost is low.

Description

technical field [0001] The invention belongs to the technical field of engine manufacturing, in particular to an engine EGR system and a diagnosis method thereof. Background technique [0002] With the increasingly stringent requirements of emission regulations, EGR (exhaust gas recirculation) technology is more and more applied to the engine. [0003] Exhaust Gas Recirculation technology (Exhaust Gas Recirculation), referred to as EGR, is a method that reintroduces the burned exhaust gas into the engine combustion chamber and mixes it with fresh air. The exhaust gas does not participate in combustion in the combustion chamber, and it absorbs part of the heat generated by combustion to Reduce the temperature and pressure of combustion, thereby reducing the generation of nitrogen oxides and reducing the pollution to the environment when exhaust gas is discharged. [0004] In the process of exhaust gas introduction, the EGR pipeline plays a vital role. Whether the exhaust gas...

Claims

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Application Information

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IPC IPC(8): F02M26/47F02M26/49
CPCF02M26/47F02M26/49
Inventor 温聪孙华
Owner 深圳臻宇新能源动力科技有限公司