CN216811971U

CN216811971U - Engine air intake system and engine

Info

Publication number: CN216811971U
Application number: CN202122706850.1U
Authority: CN
Inventors: 王雪鹏; 曾凡; 刘泉; 薄琳
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-06-24
Anticipated expiration: 2031-11-04

Abstract

The utility model belongs to the technical field of engines, and discloses an engine air inlet system and an engine. When the temperature is low, the air is heated by the heating device and is mixed with the exhaust gas cooled by the EGR cooler, and the air inlet temperature is higher, so that the moisture in the EGR cannot be condensed into liquid, and the problem of icing of an engine pipeline is effectively solved. And when ambient temperature was higher, it got into from the intercooler to admit air, and the intake temperature obtains reducing for the density of admitting air increases, has improved the air input, and then improves engine work efficiency.

Description

Engine air intake system and engine

Technical Field

The utility model belongs to the technical field of engines, particularly relates to an engine air inlet system, and further relates to an engine.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

With the increasing requirements of emission regulations and the ecological environment of people, the engines with low oil consumption and low emission become the direction of efforts in the industry. The use of EGR can effectively reduce the emission, so that the adoption of EGR technology becomes the conventional technical means of the engine at present.

EGR contains moisture in exhaust gas recirculation, and the moisture adheres to the wall surface of the pipe as EGR flows in the pipe. Under normal working conditions, the ambient temperature is high, moisture attached to the pipe wall is not easy to condense, and the moisture leaves the wall surface along with the movement of the airflow and enters the cylinder. When the engine is operated in a cold region, moisture attached to the inner wall surface of the pipe is easily condensed due to low ambient temperature. And the outer wall of the pipeline and the low temperature of fresh intake air enable more moisture in the EGR to be condensed into liquid, and when the amount of condensed water and attached moisture reaches a certain degree, large-area icing is easily formed, so that the pipeline is blocked, and the intake air of the engine is seriously influenced. Therefore, the problem of icing of the engine in the pipeline in the cold area is very important to solve. And the moisture can react with other gases to form acidic substances, so that related pipelines and EGR valves are corroded, and the reliability of the whole machine is not facilitated.

At present, the problem of EGR pipeline icing is serious, and no good coping strategy exists in EGR pipeline icing prevention. Chinese patent CN212985401U proposes to provide a water injection device at the position of the EGR valve to inject a water removing medium onto the EGR valve, thereby carrying away water vapor on the EGR valve and reducing icing. However, the structure needs to be additionally provided with a water spraying device, is complex in structure, is not beneficial to arrangement of the whole machine, has certain effect on the reliability of the whole system, and is high in maintenance cost. Chinese patent CN211258833U proposes to use a double-layer pipe to store the condensed water in the outer layer pipeline to prevent the condensed water from flowing backwards. But it can only prevent that the comdenstion water from getting into the EGR pipeline, and most moisture in the EGR still gets into in the pipeline, can't effectual solution pipeline problem of freezing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve the problems of little anti-icing effect of an EGR pipeline and complicated structure and higher cost in the prior art, and the aim is realized by the following technical scheme:

the utility model provides an engine air inlet system in a first aspect, which comprises an ECU (electronic control Unit), a temperature sensor, a first air inlet pipe, a second air inlet pipe, a gas compressor, a control valve, an intercooler, a heating device and an EGR cooler, wherein one end of the air inlet pipe is communicated with an air inlet of the gas compressor, an air outlet of the gas compressor is communicated with an inlet of the control valve, a first outlet of the control valve is communicated with an air inlet of the intercooler, a second outlet of the control valve is communicated with an air inlet of the heating device, an air outlet of the intercooler and an air outlet of the heating device are respectively communicated with a first end of the second air inlet pipe, a second end of the second air inlet pipe is used for communicating with an air inlet manifold of an engine, an air inlet of the EGR cooler is used for communicating with an exhaust manifold of the engine, and an air outlet of the EGR cooler is communicated with the second air inlet pipe, the EGR cooler with the position of second intake pipe intercommunication is located between the first end and the second end of second intake pipe, temperature sensor is used for monitoring ambient temperature, ECU respectively with temperature sensor with the control valve electricity is connected.

According to the engine air inlet system provided by the utility model, the ambient temperature is monitored through the temperature sensor, when the temperature is low, the ECU controls the control valve to heat the inlet air through the heating device, then the inlet air is mixed with the exhaust gas cooled by the EGR cooler and enters the engine through the air inlet manifold for combustion, and because the inlet air temperature is higher at the moment, the moisture in the EGR cannot be condensed into liquid, so that the problem of icing of an engine pipeline is effectively solved. And when ambient temperature was higher, it got into from the intercooler to admit air, and the intake temperature obtains reducing for the density of admitting air increases, has improved the air input, and then improves engine work efficiency.

In addition, the engine air inlet system according to the utility model can also have the following additional technical characteristics:

in some embodiments of the utility model, the heating device comprises a heating grid.

In some embodiments of the utility model, the engine air intake system further comprises an EGR valve electrically connected to the ECU for controlling the opening and closing between the EGR cooler and the exhaust manifold.

In some embodiments of the utility model, the engine air intake system further comprises a turbine in driving connection with the compressor, an air inlet of the turbine is communicated with the exhaust manifold, and the EGR valve can control connection and disconnection between the turbine and the exhaust manifold.

A second aspect of the utility model provides an engine having the engine intake system set forth in the first aspect of the utility model.

The engine proposed by the second aspect of the present invention has the same advantages as the engine air intake system proposed by the first aspect of the present invention, and the details thereof are not repeated herein.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 schematically illustrates a structural schematic diagram of an engine air intake system according to an embodiment of the present invention;

the reference symbols in the drawings denote the following:

10: first intake pipe, 11: compressor, 12: control valve, 13: intercooler, 14: heating device, 15: second intake pipe, 16: intake manifold, 17: an engine, 18: exhaust manifold, 19: EGR valve, 20: EGR cooler, 21: a turbine.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, a first aspect of the present invention provides an air intake system of an engine 17, which includes an ECU, a temperature sensor, a first air intake pipe 10, a second air intake pipe 15, a compressor 11, a control valve 12, an intercooler 13, a heating device 14, and an EGR cooler 20, wherein one end of the air intake pipe is communicated with an air inlet of the compressor 11, an air outlet of the compressor 11 is communicated with an inlet of the control valve 12, a first outlet of the control valve 12 is communicated with an air inlet of the intercooler 13, a second outlet of the control valve 12 is communicated with an air inlet of the heating device 14, an air outlet of the intercooler 13 and an air outlet of the heating device 14 are respectively communicated with a first end of the second air intake pipe 15, a second end of the second air intake pipe 15 is used for communicating with an air intake manifold 16 of the engine 17, an air inlet of the EGR cooler 20 is used for communicating with an exhaust manifold 18 of the engine 17, an air outlet of the EGR cooler 20 is communicated with the second air intake pipe 15, the EGR cooler 20 is located between the first and second ends of the second intake pipe 15 at a position where it communicates with the second intake pipe 15, a temperature sensor is used to monitor the ambient temperature, and the ECU is electrically connected to the temperature sensor and the control valve 12, respectively.

It should be noted that the compressor 11 is used for supercharging the intake air, and a conventional supercharger may be used. The temperature sensor is arranged at a place where the ambient temperature of the vehicle is easy to monitor, and the self-heating interference of the vehicle is avoided. The control valve 12 can be a conventional three-way electromagnetic valve to realize the air inlet of the branch channel. The heating device 14 may be a heating tape wrapped outside the pipeline or a heating grid disposed in the pipeline, which may be powered by a vehicle-mounted battery.

According to the air inlet system of the engine 17, the ambient temperature is monitored through the temperature sensor, when the temperature is low, for example, lower than minus 15 ℃, the ECU controls the control valve 12 to enable the inlet air to be heated through the heating device 14, then the inlet air is mixed with the exhaust gas cooled by the EGR cooler 20, the mixture enters the engine 17 through the inlet manifold 16 to be combusted, and because the inlet air temperature is high, for example, about minus 30 ℃, the moisture in the EGR cannot be condensed into liquid, and the problem that pipelines of the engine 17 are frozen is effectively solved. And when the ambient temperature is higher, for example, higher than-15 ℃, the intake air enters from the intercooler 13, the intake air temperature is reduced, the intake air density is increased, the intake air amount is increased, and the working efficiency of the engine 17 is improved.

In some embodiments of the present invention, the heating device 14 includes a heater grid, which may be disposed within the duct, and which is heated to an elevated temperature as the intake air flows through the heater grid.

In some embodiments of the utility model, the engine 17 intake system further comprises an EGR valve 19, the EGR valve 19 being electrically connected to the ECU, the EGR valve 19 being adapted to control the connection and disconnection between the EGR cooler 20 and the exhaust manifold 18.

In some embodiments of the present invention, the air intake system of the engine 17 further comprises a turbine 21, the turbine 21 is in transmission connection with the compressor 11, an air inlet of the turbine 21 is communicated with the exhaust manifold 18, and the EGR valve 19 can control the connection and disconnection between the turbine 21 and the exhaust manifold 18.

A second aspect of the utility model provides an engine 17 having an air intake system for the engine 17 as set forth in the first aspect of the utility model.

The engine 17 according to the second aspect of the present invention has the same advantageous effects as the intake system of the engine 17 according to the first aspect of the present invention, and the description thereof will be omitted.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an engine air intake system, its characterized in that, includes ECU, temperature sensor, first intake pipe, second intake pipe, compressor, control valve, intercooler, heating device and EGR cooler, the one end of intake pipe with the air inlet intercommunication of compressor, the gas outlet of compressor with the import intercommunication of control valve, the first export of control valve with the air inlet intercommunication of intercooler, the second export of control valve with heating device's air inlet intercommunication, the gas outlet of intercooler with heating device's gas outlet respectively with the first end intercommunication of second intake pipe, the second end of second intake pipe is used for communicateing the air intake manifold of engine, the air inlet of EGR cooler is used for communicateing the exhaust manifold of engine, the gas outlet of EGR cooler with second intake pipe intercommunication, the EGR cooler with the position of second intake pipe intercommunication is located the first end of second intake pipe and EGR cooler Between the second end, temperature sensor is used for monitoring ambient temperature, ECU respectively with temperature sensor with the control valve electricity is connected.

2. The engine air intake system of claim 1, wherein the heating device comprises a heater grid.

3. The engine air intake system of claim 1, further comprising an EGR valve electrically connected to the ECU, the EGR valve configured to control the connection and disconnection between the EGR cooler and the exhaust manifold.

4. The engine air intake system of claim 3, further comprising a turbine in driving communication with the compressor, the EGR valve being disposed between an air intake of the turbine and the exhaust manifold for controlling the opening and closing between the turbine and the exhaust manifold.

5. An engine characterized by having the engine air intake system according to any one of claims 1 to 4.