CN111442929A

CN111442929A - Device capable of adjusting and simulating blockage and leakage of EGR cooler

Info

Publication number: CN111442929A
Application number: CN202010250139.7A
Authority: CN
Inventors: 钟浪; 陈欢; 蒋继; 韦霞军
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-24

Abstract

The invention discloses a device capable of adjusting and simulating blockage and leakage of an EGR cooler. This EGR cooler's water inlet carries out the water intaking through transition pipeline and organism delivery port intercommunication, the device that adjustable simulation EGR cooler blockked up and leaked includes: a flow valve; and the water flow meter is connected with the flow valve in series on the transition pipeline, the flow valve is used for controlling the flow of the transition pipeline, and the water flow meter is used for measuring the flow of the transition pipeline. The device capable of adjusting the blockage and leakage of the EGR cooler can conveniently and quickly simulate and monitor the flow of different EGR coolers in real time by controlling the opening degrees of different valves, and the simulation efficiency of the blockage and leakage of the EGR cooler is improved.

Description

Device capable of adjusting and simulating blockage and leakage of EGR cooler

Technical Field

The invention relates to the field of engines, in particular to a device capable of adjusting and simulating blockage and leakage of an EGR cooler.

Background

Currently, with the continuous strictness of emission regulations, the technical difficulty is greatly improved by national emission upgrading. The manufacturer selects a brand new technical route for the engine to meet the requirements of emission regulations, economy and dynamic property; compared with the lean burn combustion technical route of the national five-day gas engine: in the six-emission stage, more engine enterprises adopt equivalent combustion technical routes; meanwhile, in order to reduce the original exhaust and exhaust temperature of the engine, an EGR system is introduced to form a technical route of equivalent weight plus EGR. The EGR system has the main working principle that a part of cooled exhaust gas is introduced into the cylinder to participate in combustion again, so that the aims of widening the detonation boundary of the engine, reducing the exhaust temperature and improving the economy are fulfilled. In combination with the important influence of the EGR system in the equivalent + EGR technical route, there are many contents for monitoring the EGR system in the six OBD regulations, one of which is the monitoring of the efficiency of the EGR cooler. When the EGR cooler of the engine is blocked or leaked, the cooling efficiency of the EGR cooler is reduced, the temperature of EGR waste gas is overhigh, the temperature of mixed gas in a cylinder is influenced, the combustion of the engine is influenced, the gas consumption of the engine is poor if the temperature is low, and the engine knocks if the temperature is high, so that the engine is damaged. In order to meet the requirements of regulations and protect an engine, and in combination with the characteristics of an EGR system, the blockage or leakage of an EGR cooler is mainly reflected on the change of the flow of cooling liquid, and a set of tool device is designed to simulate the blockage or leakage conditions of different EGR coolers of the engine and is used for simulating the flow of anti-freezing liquid of different EGR coolers so as to confirm the diagnosis threshold value related to the cooling efficiency of the EGR cooler.

The current mode of simulating blockage or leakage of the EGR cooler is that drilling is carried out on a water pipeline of the EGR cooler or operation is carried out on a gasket of a joint surface of two parts on the EGR pipeline, namely that a small-aperture gasket is manufactured artificially to intercept and reduce flow. The direct drilling mode cannot accurately simulate the required leakage amount once and solves the problem that the leaked antifreezing solution is inconvenient to process. Although the operation of cutting off and reducing the flow rate by manufacturing the gasket is simple, the flow rate of the antifreeze cannot be accurately controlled and dynamically adjusted, so that the flow rate of the antifreeze is uncontrollable and unquantifiable.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a device with a simple and reasonable structure and capable of adjusting and simulating the blockage and leakage of an EGR cooler.

In order to achieve the above object, the present invention provides an apparatus for adjustably simulating blockage and leakage of an EGR cooler, wherein a water inlet of the EGR cooler is communicated with a water outlet of a machine body through a transition pipeline to take water, and the apparatus for adjustably simulating blockage and leakage of the EGR cooler comprises: a flow valve; and the water flow meter is connected with the flow valve in series on the transition pipeline, the flow valve is used for controlling the flow of the transition pipeline, and the water flow meter is used for measuring the flow of the transition pipeline.

In a preferred embodiment, the flow valve is a manual or electric valve.

In a preferred embodiment, the device further comprises a controller, and when the flow valve is an electric valve, the flow valve is connected with the uniform controller of the water flow meter, so that closed-loop regulation of the flow of the transition pipeline is realized.

In a preferred embodiment, the flow valve and the water flow meter are connected in series to the transition line via a connecting line.

In a preferred embodiment, the connecting line is a rubber tube or a metal tube.

In a preferred embodiment, the water flow meter is located at the same level as the transition line.

Compared with the prior art, the device capable of adjusting and simulating the blockage and the leakage of the EGR cooler has the following beneficial effects: this device that adjustable simulation EGR cooler blockked up and leaked establishes ties at the water inlet of EGR cooler, through the different valve opening degree of control can convenient and fast's simulation and the different EGR cooler flow of real-time supervision, the one-time installation can realize that different degree EGR coolers block up and leak and carry out accurate simulation, and different flow is reappeared to the accuracy, has improved the simulation efficiency that EGR cooler blockked up and leaked.

Drawings

FIG. 1 is a schematic diagram of an apparatus for adjustably simulating EGR cooler plugging and leakage, according to an embodiment of the present invention.

FIG. 2 is a block diagram of closed loop regulation of electric valve flow for an apparatus that can regulate simulated EGR cooler plugging and leakage according to an embodiment of the present invention.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1, a specific structure of an oil filter according to a preferred embodiment of the present invention includes: flow valve 1 and water flowmeter 2, and with this flow valve 1, water flowmeter 2 inserts the connecting line of EGR cooler's inlet channel, through the simulation that the valve opening degree of controlling 1 difference in flow valve can convenient and fast and real-time supervision different EGR cooler flow, water flowmeter 2 can measure the flow of EGR cooler's inlet channel, homoenergetic carries out accurate simulation when simulating EGR cooler jam/leak at every turn, can repeatedly verify, the simulation efficiency that EGR cooler blockked up and leaked has been improved. After the test is finished, the engine can be recovered to a normal state by detaching the related pipeline.

Specifically, the EGR system mainly works by introducing a part of exhaust gas into a cylinder to participate in combustion again, so that the aims of widening the knock boundary of an engine, reducing exhaust temperature and improving economy are fulfilled. Part of exhaust gas enters the cylinder to participate in combustion again after being cooled by the EGR cooler, the EGR cooler 3 is provided with an air inlet 31, an air outlet 32, a water inlet 33 and a water outlet 34, the water taking mode of the EGR cooler 3 is that water is taken by the engine body, the water inlet 33 is communicated with the water outlet of the engine body through a transition pipeline, and the water outlet 34 is communicated with a water outlet header pipe. A part of the exhaust gas enters and exits the EGR cooler 3 through the gas inlet 31 and the gas outlet 32, exchanges heat with the part of the exhaust gas through cooling water entering the EGR cooler through a transition pipeline, and then flows out to a water outlet manifold.

Flow valve 1 and water flowmeter 2 establish ties on the transition pipeline through the connecting line (according to arranging in the middle of EGR cooler and organism delivery port of actual engine), after having selected the mounted position, cut the pipeline, establish ties flow valve 1 and water flowmeter 2 and install in the transition pipeline, through the simulation that control flow valve 1 different valve opening can convenient and fast and the different EGR cooler flow of real-time supervision, flow meter 2 can measure the flow of the inlet channel of EGR cooler, the homoenergetic carries out accurate simulation when simulating EGR cooler jam/leak at every turn.

In one embodiment, the water flow meter 2 is at the same level as the transition pipe to reduce the length of the pipe and the flow resistance.

In one embodiment, the connecting line is a rubber tube or a metal tube. When the connecting pipeline is a metal pipe, the connecting pipeline is welded and fixed with the transition pipeline.

In one embodiment, the flow valve 1 is a manual valve or an electric valve.

As shown in fig. 2, in an embodiment, when the flow valve 1 is an electric valve, the apparatus for adjustable simulation of blockage and leakage of the EGR cooler further includes a controller, the electric valve and the water flow meter are connected to the controller, a program is written in the controller in advance, the water flow meter inputs a real-time flow, and then the opening of the electric valve is adjusted according to a target flow and a current flow output instruction, so that program control of the opening of the electric valve and closed-loop adjustment of the flow are realized, and the simulation efficiency and the automation degree of blockage and leakage of the EGR cooler are improved.

To sum up, this device that adjustable simulation EGR cooler blockked up and leaked establishes ties at the water inlet of EGR cooler, through the different valve opening degree of control can convenient and fast simulation and the different EGR cooler flow of real-time supervision, once the installation can realize that different degrees EGR coolers block up and leak and carry out accurate simulation, and different flow is reappeared to the accuracy, has improved the simulation efficiency that EGR cooler blockked up and leaked.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides an adjustable simulation EGR cooler blocks up and device of leaking, and the water inlet of this EGR cooler carries out the water intaking through transition pipeline and organism delivery port intercommunication, its characterized in that, the device that adjustable simulation EGR cooler blockked up and leaked includes:

a flow valve; and

and the water flow meter is connected with the flow valve in series on the transition pipeline, the flow valve is used for controlling the flow of the transition pipeline, and the water flow meter is used for measuring the flow of the transition pipeline.

2. The apparatus of claim 1, wherein the flow valve is a manual or electric valve.

3. The apparatus of claim 2, further comprising a controller, wherein the flow valve is electrically operated and connected to the flow meter equalization controller to effect closed loop control of the transition line flow.

4. The apparatus for adjustable simulation of EGR cooler blockage and leakage according to claim 1, wherein said flow valve and water flow meter are connected in series to said transition line by a connecting line.

5. The apparatus for modulating EGR cooler blockage and leakage according to claim 4 wherein said connecting line is a hose or a metal tube.

6. The apparatus for adjustable simulation of EGR cooler blockage and leakage according to claim 1, wherein said water flow meter is located at the same level as the transition line.