CN211975972U

CN211975972U - EGR system and EGR system drain valve

Info

Publication number: CN211975972U
Application number: CN201922456031.9U
Authority: CN
Inventors: 冯瑞祥; 仲昆; 李耀; 孙婷
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-11-20
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a water drain valve of an EGR (exhaust gas recirculation) system, which comprises a valve body and a valve core, wherein the valve core comprises a valve cavity, the valve body is provided with a water inlet, an air inlet and a water drain hole, and the wall of the valve core is provided with a first through hole and a second through hole; when the first through hole corresponds to the water inlet, the second through hole is sealed by the valve body; when the second through hole corresponds to the water outlet, the first through hole corresponds to the air inlet, and the water inlet is sealed by the valve core. The utility model discloses a EGR system valve that drains, simple structure, the space demand is few, convenient to use. The utility model also discloses an EGR system.

Description

EGR system and EGR system drain valve

Technical Field

The utility model relates to the technical field of engines, in particular to EGR system and EGR system valve that drains.

Background

Egr (exhaust Gas recirculation) refers to a technique of introducing a part of exhaust Gas into intake air after combustion in an internal combustion engine for an automobile for re-combustion, so that nitrogen oxides (NOx) in the exhaust Gas can be reduced and fuel economy can be improved. The LP-EGR system denotes an EGR system that supplies low-pressure exhaust gas located downstream of a DPF (diesel particulate trap) to upstream of a compressor of a turbocharger.

The LP-EGR system takes gas from the back of the DPF, and the outlet of the LP-EGR system is connected to the air inlet pipe of the supercharger compressor. Condensed water of the LP-EGR cooler enters the compressor to corrode and damage blades of the compressor, and the condensed water accumulation corrodes the EGR cooler and pipelines. At present, an EGR cooler is generally arranged obliquely or vertically to enable condensed water to flow back to an exhaust tail pipe, but the arrangement needs a large space and is not suitable for medium and heavy diesel engines; the EGR valve with the water discharging mechanism needs to be provided with a plurality of valves to assist work for preventing waste gas leakage at present, and the structure is complex.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide an EGR system valve that drains, simple structure, the space demand is few, convenient to use.

Another object of the present invention is to provide an EGR system.

In order to achieve the above object, the utility model provides a following technical scheme:

an EGR system drain valve comprises a valve body and a valve core, wherein the valve core comprises a valve cavity, a water inlet, a gas inlet and a water drain outlet are formed in the valve body, and a first through hole and a second through hole are formed in the wall of the valve core; when the first through hole corresponds to the water inlet, the second through hole is sealed by the valve body; when the second through hole corresponds to the water outlet, the first through hole corresponds to the air inlet, and the water inlet is sealed by the valve core.

Optionally, a liquid level sensor is arranged on the water inlet and is in communication connection with the controller.

Optionally, the valve core is connected with an output shaft of a motor, and the motor is in communication connection with the controller.

Optionally, the valve body comprises an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected through a connecting piece.

Optionally, the valve core is a spherical valve core or a cylindrical valve core.

Optionally, a flow sensor is disposed on the water outlet, and the flow sensor is in communication connection with the controller.

Optionally, the valve body is made of stainless steel, and the valve core is made of stainless steel.

Optionally, the controller is an ECU of the engine.

The utility model also provides a EGR system, including the EGR cooler, be provided with EGR inlet tube, EGR outlet pipe, EGR intake pipe and EGR outlet duct on the EGR cooler, a serial communication port, the lowest position of EGR intake pipe is provided with the EGR system valve that drains, the EGR system valve that drains is foretell EGR system valve that drains.

Preferably, the water inlet of the EGR system drain valve is communicated with the EGR air inlet pipe.

According to the above technical scheme, the utility model provides a valve that drains of EGR system, include valve body and case, case include the valve pocket, and the valve pocket is used for the splendid attire comdenstion water for a valve has water storage and two kinds of states of draining, thereby makes the storage and the discharge work of comdenstion water that can realize of a valve, simple structure, and convenient to use, the space demand is little, can be applied to various motorcycle types, and the range of application is wider.

The utility model discloses a EGR system has foretell EGR system valve that drains, consequently, also has above-mentioned advantage, and here is no longer repeated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional structural diagram of a water drain valve of an EGR system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an EGR system drain valve in a water storage state according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an EGR system drain valve according to an embodiment of the present invention in a water discharge state;

fig. 4 is a schematic view of a connection structure of a water drain valve of an EGR system according to an embodiment of the present invention.

Detailed Description

Another object of the present invention is to provide an EGR system.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides an EGR system drain valve, which includes a valve body and a valve core 3. The valve body is sleeved on the outer surface of the valve core 3, and the valve body and the valve core 3 can move relatively.

Wherein, case 3 includes the valve pocket, and the valve pocket is used for splendid attire comdenstion water. The valve body is provided with a water inlet 8, an air inlet 6 and a water outlet 4, and the wall of the valve core 3 is provided with a first through hole 7 and a second through hole 5. Adjusting the valve body and the valve core 3, and when the first through hole 7 corresponds to the water inlet 8, the second through hole 5 is sealed by the valve body, and water is stored in the state; when the second through hole 5 corresponds to the position of the water discharge port 4, the first through hole 7 corresponds to the position of the air inlet 6, the water inlet 8 is sealed by the valve core 3, and water is discharged in the state. By providing the air inlet 6, the water in the valve chamber can flow out quickly.

The utility model discloses a EGR system valve that drains, include valve body and case 3, case 3 include the valve pocket, and the valve pocket is used for the splendid attire comdenstion water. The utility model discloses a EGR system valve that drains, a valve have the retaining and drain two kinds of states to make a valve can realize the storage and the discharge work of comdenstion water, simple structure, convenient to use, the space demand is little, can be applied to on various motorcycle types, and the range of application is wider.

In order to detect the water level of the water stored in the valve core 3 conveniently, the water inlet 8 is provided with a liquid level sensor 9, and the liquid level sensor 9 is in communication connection with the controller, so that the water storage amount in the valve cavity of the valve core 3 is monitored.

In order to realize the switching of the working state of the water drain valve conveniently, the valve core 3 is connected with an output shaft of a motor, and the motor is in communication connection with the controller. The motor controls the rotation of the valve core 3. When the liquid level sensor works, the controller controls the motor to work according to a detection signal transmitted by the liquid level sensor 9.

Specifically, the valve body includes valve body 1 and lower valve body 2, goes up valve body 1 and lower valve body 2 and passes through the connecting piece and connect. In order to prevent liquid leakage, the upper valve body 1 and the lower valve body 2 are connected in a sealing way. The connecting piece is a bolt or a screw, and the connecting and positioning are realized through a nut connected to the bolt or the screw.

Specifically, in order to facilitate the switching of the working state of the water drain valve driven by the motor, the valve core 3 is a spherical valve core or a cylindrical valve core.

Wherein, in order to prevent the comdenstion water corruption valve that drains, extension valve life that drains, the valve body is stainless steel's valve body, and case 3 is stainless steel's case.

Specifically, the controller is an ECU of the engine.

The working process is as follows: when the liquid level sensor 9 detects that the valve cavity of the valve core 3 is not filled with condensed water, the valve core 3 is in the water storage state shown in fig. 2, at the moment, the water inlet 8 is communicated with the first through hole 7, and the condensed water flows into the valve cavity of the valve core 3 through the water inlet 8 and the first through hole 7. When the liquid level sensor 9 detects that condensed water is accumulated in the valve cavity of the valve core 3, the motor controls the valve core 3 to rotate to the water discharging state shown in fig. 3, the air inlet 6 and the water discharging opening 4 are opened simultaneously, namely, the water discharging opening 4 is communicated with the second through hole 5, the air inlet 6 is communicated with the first through hole 7, the water inlet 8 is closed, waste gas is prevented from flowing out of the water discharging opening 4, and the condensed water flows out of the water discharging valve through the water discharging opening 4 under the action of self gravity and atmospheric pressure. And (3) determining water discharging time according to the size of the valve cavity of the valve core 3, and after the water discharging time is up, controlling the motor to work by the controller, and controlling the valve core 3 to rotate to the water storage state shown in the figure 2 by the motor.

In another embodiment, in order to detect whether water still flows out of the water discharging opening 4 in a water discharging state, that is, whether water still flows out of the valve cavity, a flow sensor is arranged on the water discharging opening 4, and the flow sensor is in communication connection with the controller. When the controller detects that the motor is in a water discharging working state, the controller determines whether to switch the working state of the water discharging valve according to the detection result of the flow sensor. Specifically, when the water drain valve is in a water drain state, as shown in fig. 3, when the flow sensor cannot detect a signal that water flows through, it indicates that all accumulated water in the valve cavity is drained, the controller controls the motor to operate, and the motor drives the valve core 3 to rotate, so that the water drain valve is switched to a water storage state, as shown in fig. 2.

The utility model also provides a EGR system, including EGR cooler 01, as shown in FIG. 4, be provided with EGR inlet tube 06, EGR outlet pipe 03, EGR intake pipe 04 and EGR outlet duct 02 on the EGR cooler 01, the lowest position of EGR intake pipe 04 is provided with EGR system drain valve 05, and EGR system drain valve 05 is foretell EGR system drain valve. The EGR system drain valve 05 is connected to the lowest position of the EGR air inlet pipe 04, so that condensed water can be prevented from entering the EGR cooler 01, the condensed water cannot be gathered in the EGR cooler 01 and a pipeline, the cooler and the pipeline are prevented from being corroded, and the condensed water is prevented from entering the supercharger compressor. Specifically, the water inlet of the EGR system drain valve 05 is communicated with the EGR inlet pipe 04.

In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present solution.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The EGR system drain valve comprises a valve body and a valve core (3), and is characterized in that the valve core (3) comprises a valve cavity, a water inlet (8), an air inlet (6) and a drain outlet (4) are arranged on the valve body, and a first through hole (7) and a second through hole (5) are arranged on the wall of the valve core (3); when the first through hole (7) corresponds to the water inlet (8), the second through hole (5) is sealed by the valve body; when the second through hole (5) corresponds to the water outlet (4), the first through hole (7) corresponds to the air inlet (6), and the water inlet (8) is sealed by the valve core (3).

2. The EGR system drain valve according to claim 1, characterized in that a liquid level sensor (9) is arranged on the water inlet (8), and the liquid level sensor (9) is connected with a controller in communication.

3. The EGR system bleeder valve of claim 2, wherein the spool (3) is coupled to an output shaft of an electric motor, the electric motor being in communicative connection with the controller.

4. The EGR system bleeder valve of claim 1, wherein the valve body comprises an upper valve body (1) and a lower valve body (2), and the upper valve body (1) and the lower valve body (2) are connected by a connecting piece.

5. The EGR system bleeder valve of claim 1, wherein the spool (3) is a spherical spool or a cylindrical spool.

6. The EGR system drain valve according to claim 2, characterized in that a flow sensor is arranged on the drain (4), and the flow sensor is connected with the controller in communication.

7. The EGR system drain valve according to claim 1, characterized in that the valve body is made of stainless steel, and the valve core (3) is made of stainless steel.

8. The EGR system water drain valve of claim 2, wherein the controller is an ECU of an engine.

9. An EGR system, comprising an EGR cooler (01), wherein the EGR cooler (01) is provided with an EGR water inlet pipe (06), an EGR water outlet pipe (03), an EGR air inlet pipe (04) and an EGR air outlet pipe (02), characterized in that the lowest position of the EGR air inlet pipe (04) is provided with an EGR system water drain valve (05), and the EGR system water drain valve (05) is the EGR system water drain valve of any one of claims 1 to 8.

10. The EGR system of claim 9 wherein the water inlet of the EGR system water drain valve (05) communicates with the EGR air intake pipe (04).