CN209800123U

CN209800123U - Clean low-pressure waste gas recirculation system capable of discharging condensed water

Info

Publication number: CN209800123U
Application number: CN201920453119.2U
Authority: CN
Inventors: 楼狄明; 王博; 肖泫岑; 孙进; 冯志文
Original assignee: Wuxi Tongyi Automotive Power Technology Co Ltd
Current assignee: Wuxi Tongyi Automotive Power Technology Co Ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2019-12-17
Anticipated expiration: 2029-04-04

Abstract

The utility model relates to a clean low pressure exhaust gas recirculation system of comdenstion water can discharge, it include the blast pipe, with EGR valve, EGR that the blast pipe tip is linked together cool unit, temperature sensor, silica gel desicator, one end with intake pipe and controller that the silica gel desicator is connected, the EGR cool unit include one end with the EGR valve be connected and the other end with the intercommunication pipeline that the silica gel desicator is connected, install EGR intercooler, both ends on the intercommunication pipeline respectively with the intercommunication pipeline be linked together and with the bypass pipeline that the EGR intercooler is parallelly connected mutually and install in the bypass pipeline with the bypass valve of the adjacent tip of EGR valve. Condensed water can be discharged, the blades of the compressor are prevented from being corroded, and the damage of the condensed water to the engine is not considered any more, so that the EGR inter-cooling temperature can be further reduced, and the performance of the engine is improved; compared with the traditional mechanical water-blocking mode, the water-blocking device is more reliable.

Description

Clean low-pressure waste gas recirculation system capable of discharging condensed water

Technical Field

The utility model relates to an exhaust gas recirculation system, concretely relates to clean low pressure exhaust gas recirculation system of comdenstion water can discharge.

Background

chinese patent application No. 201010238988.7, which addresses the disadvantage of conventional low pressure EGR systems that produce condensed water at low temperatures, controls the temperature of the mixture of cooled and uncooled EGR by bypassing at least a portion of the exhaust gas around the EGR cooler, bringing the exhaust gas temperature above its condensation temperature to reduce the production of condensed water; although the amount of condensed water is reduced, the method limits the intercooling temperature of EGR, and is not beneficial to further improving the performance of the engine. The chinese utility model patent No. 201721557637.6 introduces a condensate water drainage system, which can collect and discharge the condensate water in the exhaust gas. But because the system adopts mechanical water-blocking grid structure, most of the condensed water can not be effectively removed, and the practical effect is poor.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art and providing a clean low pressure exhaust gas recirculation system that can discharge the comdenstion water to the cold temperature in the further EGR that reduces improves engine performance.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a clean low-pressure exhaust gas recirculation system capable of discharging condensed water comprises an exhaust pipe, an EGR valve communicated with the end part of the exhaust pipe, an EGR inter-cooling unit, a temperature sensor, a silica gel dryer, an air inlet pipe and a controller, wherein one end of the air inlet pipe is connected with the silica gel dryer; temperature sensor installs just be located in the intercommunication pipeline EGR intercooler with between the silica gel desicator, weighing transducer is installed to the interior bottom surface of silica gel desicator, the intake pipe is equipped with the branch pipe rather than being linked together, controller passing signal line respectively with temperature sensor, weighing transducer and bypass valve are connected.

Preferably, the exhaust pipe further comprises a catalytic type particulate trap arranged between the exhaust pipe and the EGR valve, wherein the catalytic type particulate trap is arranged at one end of the exhaust pipe and is connected with the EGR valve through a pipeline.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model discloses clean low pressure exhaust gas recirculation system that can discharge comdenstion water assembles, cooperates according to specific structure through adopting blast pipe, EGR valve, the inter-cooling unit of EGR, temperature sensor, silica gel desicator, intake pipe and controller, can discharge the comdenstion water, avoids compressor blade to be corroded, because need not consider the harm of comdenstion water to the engine again, can further reduce the inter-cooling temperature of EGR, improves engine performance; compared with the traditional mechanical water-blocking mode, the water-blocking device is more reliable.

Drawings

FIG. 1 is a schematic view of a clean low pressure exhaust gas recirculation system for discharging condensed water according to the present invention;

Fig. 2 is a flow chart of a method of using the clean low pressure exhaust gas recirculation system of the present invention to drain condensed water.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

The clean low-pressure exhaust gas recirculation system capable of discharging condensed water as shown in fig. 1 mainly comprises an exhaust pipe 1, an EGR valve 3, an EGR inter-cooling unit, a temperature sensor 7, a silica gel dryer 8, an air inlet pipe 9 and a controller.

The EGR valve 3 is communicated with the end of the exhaust pipe 1 (in the embodiment, a catalytic particle trap 2 is arranged between the exhaust pipe 1 and the EGR valve 3, namely the catalytic particle trap 2 is arranged at one end of the exhaust pipe 1 and is connected with the EGR valve 3 through a pipeline, so that exhaust gas introduced into the recirculation system can be purified, particles blocking the pipeline of the valve can be reduced, HC forming acid corrosive with condensed water can be reduced, the performance of the engine can be further improved, and the service life of the recirculation system can be prolonged). The EGR inter-cooling unit comprises a communication pipeline, an EGR intercooler 6, a bypass pipeline 5 and a bypass valve 4, wherein one end of the communication pipeline is connected with the EGR valve 3, the other end of the communication pipeline is connected with the silica gel dryer 8, the EGR intercooler 6 is installed on the communication pipeline, two ends of the bypass pipeline 5 are respectively communicated with the communication pipeline and are connected with the EGR intercooler 6 in parallel, and the bypass valve 4 is installed at the end part, adjacent to the EGR valve 3, of the bypass pipeline 5 (namely the bypass valve 4 is installed at the end part; it can also be understood that the EGR intercooler 6 is connected in parallel with the bypass line 5 by means of a line attached thereto, and then connected in series with the silica gel dryer 8, the EGR valve 3, etc. by means of a line. A temperature sensor 7 is mounted in the communication line between the EGR cooler 6 and the silica gel dryer 8 downstream (as defined by the direction of flow of the exhaust gases) of the bypass line 5 for measuring the temperature of the exhaust gases flowing therethrough. The inner bottom surface of the silica gel dryer 8 is provided with a weight sensor which can define: when the silica gel in the silica gel dryer 8 does not absorb water, the reading of the weight sensor is m; when the water absorption capacity of the silica gel reaches saturation, the reading of the weight sensor is M; the silica gel in the silica gel dryer 8 can be dried and regenerated by hot air. One end of the air inlet pipe 9 is connected with the silica gel dryer 8, and a branch pipe communicated with the silica gel dryer is also arranged on the air inlet pipe; namely, the free end of the air inlet pipe 9 forms an air inlet, and a mixed gas outlet connected with the air compressor is arranged between the air inlet and the silica gel dryer 8. The controller is respectively connected with the temperature sensor 7, the weight sensor and the bypass valve 4 through signal lines, adopts a conventional commercially available PLC (programmable logic controller) (of Siemens and other brands) and is used for receiving signals of the weight sensor to control the opening and closing of the bypass valve 4 and receiving signals of the temperature sensor 7 to adjust the opening of the bypass valve 4.

The method for using the clean low-pressure exhaust gas recirculation system capable of discharging condensed water, as shown in fig. 2, comprises the following steps:

(a) Introducing exhaust gas into an exhaust pipe 1, and flowing into a catalytic type particle trap 2 for purification;

(b) Passing exhaust gas through the EGR valve 3 and the EGR intercooler 6;

(c) the waste gas flows into a silica gel dryer 8 for drying; when the silica gel in the silica gel dryer 8 does not absorb water and the water absorption is saturated, the readings of the weight sensors are respectively M and M; when the reading of the weight sensor reaches M, a controller opens a bypass valve 4 to enable part of the waste gas to flow through a bypass pipeline 5 (two waste gases are converged at the upstream of a temperature sensor 7, the reading of the temperature sensor 7 is T at the moment), the opening of the bypass valve 4 is adjusted to 120-130 ℃ to stably work (namely T is more than or equal to 120 ℃ and less than or equal to 130 ℃, if T is more than or equal to 120 ℃ and less than or equal to 130 ℃, the opening of the bypass valve 4 is kept to stably work, if T is less than 120 ℃ or greater than 130 ℃, the opening of the bypass valve 4 is adjusted, the operation is repeated until T is more than or equal to 120 ℃ and less than or equal to 130 ℃, the opening is kept to stably work, even if the temperature of the waste gas at a silica gel dryer 8 is more than 120 ℃, the temperature is not too high, and needs to be less than 130 ℃; the reading of the weight sensor is gradually reduced, the device keeps stable work, and when the reading of the weight sensor is reduced to m, the bypass valve is closed through the controller; the regeneration process of the silica gel dryer 8 is ended.

(d) The exhaust gas flows into the inlet pipe 9 to be mixed with fresh air and then is introduced into the compressor.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. the utility model provides a clean low pressure exhaust gas recirculation system of exhaustable comdenstion water, it includes blast pipe (1), with EGR valve (3) that blast pipe (1) tip is linked together, the cold unit in the EGR, temperature sensor (7), silica gel desicator (8), one end with intake pipe (9) and controller that silica gel desicator (8) are connected, its characterized in that: the EGR inter-cooling unit comprises a communication pipeline, an EGR intercooler (6) arranged on the communication pipeline, a bypass pipeline (5) and a bypass valve (4), wherein one end of the communication pipeline is connected with the EGR valve (3), the other end of the communication pipeline is connected with the silica gel dryer (8), two ends of the bypass pipeline are respectively communicated with the communication pipeline and are connected with the EGR intercooler (6) in parallel, and the bypass valve (4) is arranged at the end part, adjacent to the EGR valve (3), in the bypass pipeline (5); temperature sensor (7) are installed in the intercommunication pipeline and be located EGR intercooler (6) with between silica gel desicator (8), the interior bottom surface mounting of silica gel desicator (8) has weighing transducer, intake pipe (9) are equipped with the branch pipe rather than being linked together, controller passing signal line respectively with temperature sensor (7), weighing transducer and bypass valve (4) are connected.

2. A clean low pressure egr system with condensate drain capability as claimed in claim 1, wherein: the exhaust gas purification device is characterized by further comprising a catalytic particle trap (2) arranged between the exhaust pipe (1) and the EGR valve (3), wherein the catalytic particle trap (2) is installed at one end of the exhaust pipe (1) and is connected with the EGR valve (3) through a pipeline.