CN112664377A - Engine operation auxiliary system and method - Google Patents
Engine operation auxiliary system and method Download PDFInfo
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- CN112664377A CN112664377A CN202011403389.6A CN202011403389A CN112664377A CN 112664377 A CN112664377 A CN 112664377A CN 202011403389 A CN202011403389 A CN 202011403389A CN 112664377 A CN112664377 A CN 112664377A
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Abstract
The invention provides an engine operation auxiliary system and method, comprising the following steps: the device comprises an air bottle, a pressure maintaining box, an electric control spray head, an exhaust system, a first valve and a one-way valve; the air outlet of the air bottle is connected with the pressure maintaining tank through a gas transmission pipe; the pressure maintaining box is connected with the electric control spray head through a gas transmission pipe; the electronic control spray head is arranged on the engine cylinder cover and is used for spraying high-pressure air into the engine cylinder; the exhaust system is connected with the engine cylinder and is connected with the pressure maintaining box through a gas transmission pipe; the first valve is arranged on an air outlet pipe of the exhaust system and is used for enabling compressed air exhausted by an engine cylinder to enter the pressure maintaining box; the check valve is arranged on a gas pipe between the exhaust system and the pressure maintaining box, the gas inlet end is connected with the exhaust system, and the gas outlet end is connected with the pressure maintaining box. The engine operation auxiliary system and the method collect high-pressure gas during the shutdown, realize the pre-charging and the quick shutdown of the air bottle, and realize the auxiliary starting of the high-pressure gas during the starting, so that the engine rapidly enters the normal rotating speed, and the emission and the vibration noise are reduced.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to an engine operation auxiliary system and method.
Background
Starting noise and stop judder of the engine are points of more complaints of users, and how to improve the starting and stopping vibration and noise of the engine is a current major problem.
At present, the BMW solves the problem by changing combustion control and intelligent valve switches. Meanwhile, in the starting process of the engine, both the oil injection control and the ignition control can not enter closed-loop control for better starting performance, wherein the starting particulate matter caused by cold start injection exceeds the standard seriously, and the environmental pollution is serious. In order to solve the problem, a low-temperature fuel heating system is installed on part of vehicle models. The engine proportioning compression cylinder ignition technology of part manufacturers shortens the engine starting dragging time, improves the starting performance and improves the starting comfort. When the engine is stopped, the variable valve lift technology is used, the exhaust resistance is increased, and the engine is quickly stopped, but the variable valve lift technology cannot be realized when the engine does not have the variable valve lift technology.
Therefore, a system and method for assisting the operation of a motor is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an engine operation auxiliary system and method, which can reduce the pollution problem caused by rich mixture in the starting process and the customer complaint problem caused by engine vibration in the starting and stopping process.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an engine operation assist system comprising: the device comprises an air bottle, a pressure maintaining box, an electric control spray head, an exhaust system, a first valve and a one-way valve; the air outlet of the air bottle is connected with the pressure maintaining tank through a gas transmission pipe; the pressure maintaining box is connected with the electric control spray head through a gas transmission pipe; the electronic control spray head is arranged on the engine cylinder cover and is used for spraying high-pressure air into the engine cylinder; the exhaust system is connected with the engine cylinder and is connected with the pressure maintaining box through a gas transmission pipe; the first valve is arranged on an air outlet pipe of the exhaust system and is used for enabling compressed air exhausted by an engine cylinder to enter the pressure maintaining box; the check valve is arranged on a gas pipe between the exhaust system and the pressure maintaining box, the gas inlet end is connected with the exhaust system, and the gas outlet end is connected with the pressure maintaining box.
In a preferred embodiment of the present invention, the engine operation assisting system further includes: a second valve; the first valve is an electromagnetic valve, and the second valve is a pressure reducing valve; the first valve is used for enabling high-pressure air compressed and discharged by the air cylinder to reach the pressure maintaining box through the one-way valve and the corresponding air conveying pipe; the second valve is installed on the gas pipe between the air bottle and the pressure maintaining tank.
In a preferred embodiment of the present invention, the engine operation assisting system includes: an electronic control device; the electronic control device is respectively connected with the first valve, the second valve and the electric control spray head.
In a preferred embodiment of the present invention, the engine auxiliary system further includes: a third valve; one end of the third valve is connected with the air bottle, the other end of the third valve is connected with the second valve, and the third valve is a mechanical valve.
In a preferred embodiment of the present invention, the engine auxiliary system further includes: a first air pressure sensor and a second air pressure sensor; the first air pressure sensor is arranged in the air bottle; the second air pressure sensor is installed in the pressure-holding box.
An engine operation assisting method that operates based on the engine operation assisting system; in the starting process of the engine, the electronic control device controls the first valve, the second valve and the electronic control spray head to be opened; at the moment, the compressed air stored in the air bottle reaches the pressure maintaining box through the second valve and is injected into the engine cylinder through the electric control spray head under the control of the electronic control device; in the process of stopping the engine, the electronic control device controls the first valve, the second valve and the electronic control nozzle to be closed; at this time, high-pressure air compressed and exhausted by the engine cylinder enters the pressure maintaining tank from the exhaust system through the one-way valve.
In a preferred embodiment of the present invention, during the GPF regeneration, the electronic control device controls the first valve, the second valve and the electrically controlled nozzle to open; at the moment, the compressed air stored in the air bottle reaches the pressure maintaining tank through the second valve, is mixed with the stop recovered compressed air in the pressure maintaining tank, and is injected into the engine cylinder through the electric control nozzle.
In a preferred embodiment of the present invention, when the air pressure in the pressure maintaining tank exceeds the threshold value during the engine shutdown process, the electronic control device opens the second valve, so that the compressed air in the pressure maintaining tank enters the air tank through the second valve.
In a preferred embodiment of the present invention, when the air pressure in the air bottle is less than or equal to the predetermined air pressure, the air bottle is used for supplying air.
The technical effect achieved by adopting the technical scheme is as follows: high-pressure gas is collected in the stopping process of the engine, so that the pre-charging and the quick stopping of an air bottle are realized; the high-pressure gas is used for assisting in starting in the starting process of the engine, so that the engine can rapidly enter a normal rotating speed, a rich mixed gas starting stage is cancelled, and emission and vibration noise are reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic configuration diagram showing an engine operation assist system according to a first embodiment of the present invention.
Fig. 2 is a schematic configuration diagram showing an engine operation assisting system according to a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. Depending on the context, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination". Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.
Referring to fig. 1, a schematic block diagram of an engine operation assisting system according to various embodiments of the present disclosure is shown, where the engine operation assisting system may include: the device comprises an air bottle 1, a pressure maintaining tank 3, an electric control spray head 4, an exhaust system 6, a first valve 7 and a one-way valve 8. Those skilled in the art will appreciate that the engine operation assistance system configuration shown in FIG. 1 does not constitute a limitation of engine operation assistance systems, and that engine operation assistance systems may include more or fewer modules than shown, or some modules may be combined, or a different arrangement of modules.
The following describes the various modules of the engine operation assist system in detail with reference to fig. 1 and 2:
an engine operation assist system comprising: the device comprises an air bottle 1, a pressure maintaining tank 3, an electric control spray head 4, an exhaust system 6, a first valve 7 and a one-way valve 8; the air outlet of the air bottle 1 is connected with the pressure maintaining tank 3 through a gas transmission pipe; the pressure maintaining box 3 is connected with the electric control spray head 4 through a gas transmission pipe; the electric control spray head 4 is arranged on an engine cylinder cover and is used for spraying high-pressure air into an engine cylinder 5; the exhaust system 6 is connected with the engine cylinder 5 and is connected with the pressure maintaining tank 3 through a gas pipe; the first valve 7 is arranged on an air outlet pipe of the exhaust system 6 and is used for enabling compressed air exhausted by an engine cylinder to enter the pressure maintaining box 3; the check valve 8 is installed on the gas-supply pipe between the exhaust system 6 and the pressure maintaining tank 3, the air inlet end of the check valve 8 is connected with the exhaust system 6 through the gas-supply pipe, and the air outlet end is connected with the pressure maintaining tank 3 through the gas-supply pipe.
Specifically, the air bottle 1 can reach the pressure maintaining tank 3 through the air pipe after supplying high-pressure compressed air, then reach the electronic control nozzle 4 from the pressure maintaining tank 3 through the air pipe, and finally be injected into the engine cylinder through the electronic control nozzle 4, so that the inflation quantity in the cylinder is improved. The high-pressure air compressed and exhausted by the engine cylinder 5 can reach the air inlet end of the one-way valve 8 through the air delivery pipe by the exhaust system 6, and then reach the pressure maintaining box 3 and/or the air bottle 1 for storage through the one-way valve 8 and the corresponding air delivery pipe. After the first valve 7 is closed, the high-pressure air generated by compression of the engine cylinder 5 can only flow into the pressure maintaining tank 3 through the one-way valve 8, but cannot flow out of the pressure maintaining tank 3 through the one-way valve 8, so that the high-pressure air in the pressure maintaining tank 3 is effectively prevented from being discharged from the exhaust system 6.
Specifically, the main characteristic of the structure is that the compressed air stored in the air bottle 1 is utilized to assist the starting process of the engine. 1. The compressed air can directly do work to achieve the starting purpose. 2, the compressed air can solve the problems of insufficient air inflow and over-rich air mixture in the starting process of the engine. Reduce the pollution problem caused by rich mixture in the starting process and the customer complaint problem caused by the vibration of the engine in the starting and stopping processes. In the process of downhill or shutdown, the compressed air energy can be recovered by closing the first valve 7 and stored in the pressure-retaining box 3 or the air bottle 1, so that the energy recovery effect can be achieved, and the energy-saving and environment-friendly effects are better achieved. Meanwhile, under the working conditions of GPF regeneration and the like, the problem of oxygen concentration in tail gas can be solved by injecting high-pressure air into the engine cylinder 5, and the problem of emission pollution in the regeneration process is solved.
In one embodiment, the engine operation assisting system further comprises: a second valve 2; the first valve 7 is an electromagnetic valve, and the second valve 2 is a pressure reducing valve; the first valve 7 is used for enabling high-pressure air compressed and discharged by the air cylinder to the exhaust system 6 to reach the pressure maintaining box 3 through the one-way valve 8 and the corresponding air conveying pipe; the second valve 2 is installed on the air pipe between the air bottle 1 and the pressure maintaining tank 3, and is used for reducing the high-pressure air in the air bottle 1 to a stable air pressure and then reaching the pressure maintaining tank 3.
Specifically, during the engine starting process, the compressed air stored in the air tank 1 is reduced to a stable air pressure through the second valve 2 and then reaches the pressure maintaining tank 3, and is mixed with the stop recovery compressed air in the pressure maintaining tank 3 and then is injected into the cylinder through the electronic control nozzle 4.
In one embodiment, an engine operation assist system includes: an Electronic Control Unit (ECU) 9; the electronic control device 9 is respectively connected with the first valve 7, the second valve 2 and the electric control spray head 4.
Specifically, the electronic control device 9 is used for controlling the opening and closing of the first valve 7, the second valve 2 and the electrically controlled spray head 4 during the starting process of the engine. When the electronic control device 9 controls the first valve 7 to close, the high-pressure air in the exhaust system 6 cannot be discharged from the exhaust pipe to the outside. When the electronic control device 9 controls the second valve 2 and the electronic control nozzle 4 to be opened, high-pressure air in the air bottle 1 can be injected into the engine cylinder 5. Wherein, in the normal mode, the first valve 7 electromagnetic valve is a normally open valve, so that the exhaust system 6 of the engine can exhaust normally.
In one embodiment, the engine assist system further comprises: a third valve 11; one end of the third valve 11 is connected with the air bottle, and the other end is connected with the second valve 2, wherein the third valve 11 is a mechanical valve.
Specifically, the third valve 11 is a mechanical valve and is not electrically controlled by the electronic control device 9, and when the third valve 11 is closed, the high-pressure gas stored in the air tank 1 cannot reach the pressure maintaining tank 3, so that the high-pressure air stored in the air tank 1 can be prevented from leaking, and the maintenance of an engine auxiliary system is facilitated. In the normal mode, the mechanical valve of the third valve 11 is in a normally open state.
In one embodiment, the engine assist system further comprises: a first air pressure sensor (not shown) and a second air pressure sensor (not shown); the first air pressure sensor is arranged in the air bottle 1; a second air pressure sensor is mounted in the pressure retention tank 3.
Specifically, the first air pressure sensor and the second air pressure sensor can detect the air pressures in the pressure-maintaining tank 3 and the air tank 1, and prevent the air pressures in the pressure-maintaining tank 3 and the air tank 1 from being too large or too small.
In one embodiment, the engine assist system further comprises: an air intake system 10, a fourth valve 12 and a compression device 13.
Specifically, an air intake system 10 is provided for taking air from the outside for the engine. The compressor 13 can supplement the air tank 1 with high-pressure air.
The invention further provides an engine operation auxiliary method, and the engine operation auxiliary method operates based on the engine operation auxiliary system.
During the starting process of the engine, the electronic control device 9 controls the first valve 7, the second valve 2 and the electronic control nozzle 4 to be opened; at this time, the compressed air stored in the air bottle 1 reaches the pressure maintaining tank 3 through the second valve 2 and is injected into the engine cylinder 5 through the electric control nozzle 4 under the control of the electronic control device 9; in the process of stopping the engine, the electronic control device 9 controls the first valve 7, the second valve 2 and the electronic control nozzle 4 to be closed; at this time, the high-pressure air compressed and discharged by the engine cylinder 5 enters the holding tank 3 from the exhaust system through the check valve 8.
Specifically, during the engine start, the compressed air stored in the air tank 1 reaches the surge tank 3 through the pressure reducing valve under the control of the third valve 11. The high-pressure air is mixed with the shutdown recovered compressed air in the pressure maintaining tank 3 and is sprayed into a cylinder through the electric control spray head 4 under the accurate control of the electronic control device 9, the rotating speed of the engine can be quickly increased through high-pressure air expansion, the friction resistance is overcome to do work, and the starting quality of the engine is improved. Meanwhile, the air filling amount in the corresponding cylinder is improved, an over-concentration mixer is not needed, the cylinder can directly enter closed-loop control, oil injection and ignition are carried out according to a closed-loop state, the engine is started quickly, and meanwhile particulate matter emission and gaseous emission of the engine are reduced.
During the stop of the engine, under the precise control of the electronic control device 9, the solenoid valve works, so that the high-pressure air compressed and discharged by each cylinder reaches the pressure-maintaining tank 3 through the one-way valve 8 and the corresponding pipeline. The process can realize the effect of exhaust braking, can stop the machine quickly, and simultaneously, the vibration capability during the stop can be converted into compressed air compression energy to be absorbed and consumed. And the shutdown jitter condition is reduced. And meanwhile, the recovered compressed air can be utilized when the engine is started next time. The energy recovery function is realized. When the engine runs down a long slope, the engine brake can be realized, the load of a brake system is reduced, a large amount of compressed air can be recycled, and the engine can run in an auxiliary mode when the engine runs up a slope and other large loads, so that the inflation efficiency is improved, and the engine can run in an economic area.
When the engine runs at low speed and creeps or is in traffic jam, the engine can be switched to a pure high-pressure air pushing running mode, and the emission of the engine is further reduced.
In the GPF regeneration process, the electronic control device 9 controls the first valve 7, the second valve 2 and the electric control spray head 4 to be opened; at this time, the compressed air stored in the air tank 1 reaches the pressure maintaining tank 3 through the second valve 2, is mixed with the stop recovery compressed air in the pressure maintaining tank 3, and is injected into the engine cylinder 5 through the electronically controlled spray head 4.
In particular, during GPF regeneration, under the precise control of the electronic control means 9, the compressed air stored in the air tank 1 reaches the pressure-holding tank 3 through a pressure-reducing valve under the control of the third valve 11. Mixed with the stop recovery compressed air in the pressure maintaining tank 3 and sprayed into the cylinder through the electric control spray head 4. Under the condition of working without ignition, a large amount of oxygen is directly communicated into an exhaust system, the GPF regeneration efficiency is improved under the action of the oxygen, and the generation of pollutants discharged by GPF regeneration is reduced.
When the engine is stopped, if the air pressure in the pressure holding tank 3 exceeds the threshold value, the electronic control device 9 opens the second valve 2, so that the compressed air in the pressure holding tank 3 enters the air tank 1 through the second valve 2.
Specifically, when the high-pressure gas cannot be continuously collected in the holding tank 3, the electronic control device 9 opens the pressure reducing valve of the second valve 2, and the high-pressure air in the holding tank 3 can be made to flow into the air tank 1.
When the air pressure in the air bottle 1 is less than or equal to the preset air pressure, the air bottle 1 supplements air.
Specifically, the air pressure in the air tank 1 is less than or equal to the preset air pressure, which indicates that the high-pressure air stored in the air tank 1 is insufficient and needs to be supplemented. The air is obtained from the outside by the compression device, compressed and then conveyed to the air bottle 1 for storage, and when the air pressure in the air bottle 1 is greater than or equal to a second preset air pressure, the compression device stops conveying high-pressure air into the air bottle 1.
The method and the device can reduce the starting dragging time of the engine, so that the engine can quickly enter an idling working condition, and the generation of emissions in the starting process is reduced; under the conditions of traffic jam and low-speed driving, the vehicle can be switched to high-pressure air for driving, so that the emission is reduced; the shutdown energy can be recovered, the energy loss in the starting process can be fed back, and the energy-saving effect can be achieved; excess air can be introduced, so that a large amount of oxygen exists in an exhaust system, the GPF regeneration efficiency can be improved, and the particle emission pollutants are further reduced. The variable valve lift control method can be realized on the engine without the variable valve lift technology, and has wide practicability.
The present invention is not limited to the details of the above embodiments, which are exemplary, and the modules or processes in the drawings are not necessarily essential to the implementation of the embodiments of the present invention, and should not be construed as limiting the present invention.
Claims (9)
1. An engine operation assist system, characterized by comprising: the device comprises an air bottle, a pressure maintaining box, an electric control spray head, an exhaust system, a first valve and a one-way valve;
the air outlet of the air bottle is connected with the pressure maintaining box through an air conveying pipe;
the pressure maintaining box is connected with the electric control spray head through a gas transmission pipe;
the electronic control spray head is arranged on the engine cylinder cover and is used for spraying high-pressure air into the engine cylinder;
the exhaust system is connected with the engine cylinder and is connected with the pressure maintaining box through a gas transmission pipe;
the first valve is arranged on an air outlet pipe of the exhaust system and is used for enabling compressed air exhausted by the engine cylinder to enter the pressure maintaining box;
the check valve is installed on the gas pipe between the exhaust system and the pressure maintaining box, the gas inlet end is connected with the exhaust system, and the gas outlet end is connected with the pressure maintaining box.
2. The engine operation assist system as set forth in claim 1, further comprising: a second valve;
the first valve is an electromagnetic valve, and the second valve is a pressure reducing valve;
the first valve is used for enabling high-pressure air compressed and discharged by the air cylinder to reach the pressure maintaining box through the one-way valve and the corresponding air conveying pipe;
the second valve is arranged on an air pipe between the air bottle and the pressure maintaining box.
3. The engine operation assist system as set forth in claim 2, comprising: an electronic control device;
and the electronic control device is respectively connected with the first valve, the second valve and the electric control spray head.
4. The engine operation assist system as set forth in claim 2, further comprising: a third valve;
one end of the third valve is connected with the air bottle, and the other end of the third valve is connected with the second valve, wherein the third valve is a mechanical valve.
5. The engine operation assist system as set forth in claim 1, further comprising: a first air pressure sensor and a second air pressure sensor;
the first air pressure sensor is mounted in the air bottle;
the second air pressure sensor is installed in the pressure maintaining box.
6. An engine operation assisting method, characterized in that the engine operation assisting method is operated based on the engine operation assisting system of claim 1;
in the starting process of the engine, the electronic control device controls the first valve, the second valve and the electronic control spray head to be opened;
at this time, the compressed air stored in the air bottle reaches the pressure maintaining tank through the second valve and is injected into the engine cylinder through the electronic control nozzle under the control of the electronic control device;
in the stopping process of the engine, the electronic control device controls the first valve, the second valve and the electronic control spray head to be closed;
at this time, high-pressure air compressed and discharged by the engine cylinder enters the pressure-maintaining tank from the exhaust system through the one-way valve.
7. The engine operation assist method of claim 6, wherein the electronic control device controls the first valve, the second valve, and the electrically controlled spray head to open during GPF regeneration;
at this time, the compressed air stored in the air bottle reaches the pressure maintaining tank through the second valve, is mixed with the stop recovered compressed air in the pressure maintaining tank, and is injected into the engine cylinder through the electric control nozzle.
8. The engine operation assisting method according to claim 6, wherein the electronic control device opens the second valve to allow the compressed air in the surge tank to enter the air tank through the second valve if the air pressure in the surge tank exceeds a threshold value during the engine stop.
9. The engine operation assisting method according to claim 6, wherein the air tank is replenished when the air pressure in the air tank is less than or equal to a preset air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403389.6A CN112664377A (en) | 2020-12-04 | 2020-12-04 | Engine operation auxiliary system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011403389.6A CN112664377A (en) | 2020-12-04 | 2020-12-04 | Engine operation auxiliary system and method |
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| CN112664377A true CN112664377A (en) | 2021-04-16 |
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Application publication date: 20210416 |