CN214836690U

CN214836690U - A system for reducing fuel consumption of rotary engine

Info

Publication number: CN214836690U
Application number: CN202121173553.9U
Authority: CN
Inventors: 陈征
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-23
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a system for reducing fuel consumption of a rotary engine, aiming at improving the fuel efficiency of the rotary engine. To this end, an embodiment of the present invention provides a system for reducing fuel consumption of a rotary engine, the rotary engine has an intake manifold and an exhaust manifold, the exhaust manifold and the intake manifold located downstream of the throttle valve pass through The exhaust pipe is connected with each other, an exhaust gas recirculation (EGR) valve is arranged on the exhaust pipe, and a back pressure valve is arranged on the exhaust pipe downstream of the exhaust pipe.

Description

System for reducing fuel consumption of rotary engine

Technical Field

The utility model belongs to the technical field of the internal-combustion engine, especially, relate to a system for reduce rotor engine fuel consumption.

Background

The rotary engine is an internal combustion engine which replaces the reciprocating motion of a piston with the rotary motion of a triangular rotor. The rotor engine works similarly to a four-stroke reciprocating piston internal combustion engine, and has four strokes of air inlet, compression, work application and air exhaust. But compared with a reciprocating piston type internal combustion engine, the rotary engine has the advantages of simple structure, small volume, few parts, high rotating speed and power-weight ratio and the like. However, since the rotary engine usually adopts a spark ignition type ignition mode, the long and narrow combustion chamber structure is not favorable for complete combustion of fuel; and the airflow movement direction is single, and the flame propagation path is long, so that the combustion duration is long, the heat-power conversion efficiency is low, and the fuel consumption rate is higher than that of a four-stroke reciprocating piston type internal combustion engine.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a system for reducing fuel consumption of a rotary engine, which aims to improve the fuel efficiency of the rotary engine.

Therefore, the embodiment of the utility model provides a system for reduce rotor engine fuel consumption, this rotor engine have an air intake manifold and an exhaust manifold, exhaust manifold with be located the throttle valve low reaches air intake manifold is linked together through the exhaust takeover, be equipped with the EGR valve on the exhaust takeover, be located on the exhaust manifold the low reaches of exhaust takeover are equipped with the backpressure valve.

Specifically, the EGR valve and the back pressure valve adopt electronic control or mechanical control or vacuum control valve structures.

Specifically, a fuel injector is arranged on the air inlet pipe between the exhaust connecting pipe and the throttle valve, and the fuel injector can be further mounted on a cylinder body of the rotor engine to directly inject fuel into a combustion chamber.

Specifically, the EGR valve, the backpressure valve, the throttle valve and the oil injector are all controlled by the same electronic control unit.

Specifically, the fuel adopted by the rotary engine is gasoline, aviation kerosene or diesel oil.

Specifically, the rotary engine is provided with a spark plug.

The embodiment of the utility model provides a method for reducing rotor engine fuel consumption on the one hand, on the one hand through increase a backpressure valve on rotor engine's exhaust manifold to through the flow of the high temperature waste gas of this backpressure valve control outflow exhaust manifold, force a part of high temperature waste gas to remain in the combustion chamber, provide certain energy for rotor engine next cycle's fuel gasification and fast combustion; on the other hand, an exhaust connecting pipe is additionally arranged on an exhaust manifold of the rotary engine and is communicated with an intake manifold at the downstream of a throttle valve, an EGR valve is arranged on the exhaust connecting pipe, and the opening degree of the EGR valve is adjusted to control the flow rate of high-temperature exhaust gas which flows into the intake manifold again, so that certain energy is provided for fuel gasification and rapid combustion in a combustion chamber of the rotary engine, and the purpose of accelerating combustion of mixed gas in a cylinder is achieved.

Specifically, in the cold starting process, the back pressure valve is completely closed or the EGR valve is completely opened, high-temperature waste gas is retained in the combustion chamber or enters the air inlet main pipe and the combustion chamber through the EGR valve through the exhaust connecting pipe, so that an internal hot waste gas atmosphere with a high concentration ratio is formed in the cylinder, fuel atomization is accelerated, and a uniform combustible mixed gas is formed with air in the air inlet and compression processes, the combustible mixed gas is ignited and combusted almost simultaneously under the triggering of ignition of the spark plug and the heating of the high-temperature waste gas, so that flame is rapidly transmitted to the whole long and narrow combustion chamber, and the effects of shortening the combustion duration and improving the heat-power conversion efficiency are achieved;

under the working conditions of low load and medium load, the backpressure valve or the EGR valve is partially closed or partially opened, a part of high-temperature waste gas is retained in the combustion chamber or enters the air inlet main pipe and the combustion chamber through the exhaust connecting pipe and the EGR valve, so that high-temperature waste gas with a certain concentration proportion is formed in the cylinder, the high-temperature waste gas can accelerate fuel atomization and form uniform combustible mixed gas with air in the air inlet and compression processes, and the combustible mixed gas is ignited and combusted almost simultaneously under the ignition of the spark plug (10) and the heating of the high-temperature waste gas, so that flame is rapidly transmitted to the whole long and narrow combustion chamber, and the effects of shortening the combustion duration and improving the heat-power conversion efficiency are achieved;

under the working conditions of large load and full load, in order to reduce exhaust back pressure, the back pressure valve is fully opened or the EGR valve is fully closed, a small part of high-temperature waste gas is left in the combustion chamber, and the fuel mixture is still combusted in the traditional spark ignition and flame propagation modes so as to meet the requirements of dynamic property and power-to-weight ratio.

Compared with the prior art, the utility model discloses at least one embodiment has following beneficial effect:

(1) the backpressure valve additionally arranged on the exhaust pipe of the rotary engine can adjust the effective flow area of the exhaust pipe, so that the flow of high-temperature waste gas flowing out of the exhaust pipe can be controlled, a part of high-temperature waste gas is forced to remain in a combustion chamber, and certain energy is provided for next cycle of fuel gasification and rapid combustion of the rotary engine.

(2) An EGR valve is arranged on an exhaust connecting pipe connected between an exhaust manifold of the rotary engine and an air inlet manifold at the downstream of a throttle valve, the flow of high-temperature exhaust gas flowing into the air inlet manifold again can be controlled by adjusting the opening of the EGR valve, and certain energy can be provided for fuel gasification and rapid combustion in a combustion chamber of the rotary engine, so that the rotary engine can realize a spark-assisted compression ignition combustion process that most combustible mixed gas is ignited at the same time under certain operating conditions, such as medium-low rotating speed and medium-low load operating conditions, and the purpose of accelerating the combustion of the mixed gas in a cylinder is achieved; meanwhile, high-temperature waste gas is introduced into the air inlet pipe, which is also beneficial to improving the gasification process of heavy oil fuels such as aviation kerosene or diesel oil and the like, and accelerating the formation and combustion of combustible mixed gas.

Drawings

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

FIG. 1 is a schematic diagram of a system for reducing fuel consumption of a rotary engine according to an embodiment of the present invention;

wherein: 1. a rotary engine; 2. an intake manifold; 3. an exhaust manifold; 4. a throttle valve; 5. an exhaust adapter; 6. an EGR valve; 7. a back pressure valve; 8. an oil injector; 9. an electronic control unit; 10. a spark plug.

Detailed Description

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 efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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 invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a system for reducing fuel consumption of a rotary engine, the rotary engine 1 having an intake manifold 2 and an exhaust manifold 3, the exhaust manifold 3 and the intake manifold 2 located downstream of a throttle valve 4 being communicated through an exhaust joint pipe 5, the exhaust joint pipe 5 being provided with an EGR valve 6 (exhaust gas recirculation valve), the exhaust manifold 3 being provided with a back pressure valve 7 located downstream of the exhaust joint pipe 5.

In this embodiment, on the rotary engine 1, the original structural components are not changed, a back pressure valve 7 is newly added on the exhaust manifold 3, one path of exhaust connecting pipe 5 is newly added to be communicated with the intake manifold 2 at the downstream of the throttle valve 4, the EGR valve 6 is installed on the exhaust connecting pipe 5, part of high-temperature exhaust gas can be continuously remained in the combustion chamber under the influence of the closing or partial closing of the back pressure valve 7 in the exhaust process, and in addition, part of high-temperature exhaust gas can flow into the intake manifold 2 again when the EGR valve 6 on the exhaust connecting pipe 5 is opened, so that the purposes of improving the combustion of the rotary engine 1 and reducing the fuel consumption rate of the rotary engine are achieved.

Referring to fig. 1, in some embodiments, an injector 8 is disposed on the intake manifold 2 between the exhaust pipe 5 and the throttle valve 4, and the EGR valve 6, the backpressure valve 7, the throttle valve 4, and the injector 8 are all controlled by the same electronic control unit 9 (ECU); of course, the control method of the EGR valve 6 and the back pressure valve 7 may be mechanical control or vacuum control. In addition, a spark plug 10 is provided on the rotary engine 1, and the fuel used by the rotary engine 1 may be gasoline, jet fuel, or diesel fuel. Of course, the fuel injector 8 may be provided directly on the cylinder block of the rotary engine 1 to inject fuel directly into the combustion chamber.

Referring to fig. 1, the embodiment of the present application further provides a method for reducing fuel consumption of a rotary engine, on one hand, by adding a back pressure valve 7 to an exhaust manifold 3 of the rotary engine 1 and adjusting the degree of closing the effective flow area of the exhaust manifold 3 by the back pressure valve 7, the flow rate of high-temperature exhaust gas flowing out of the exhaust manifold 3 is controlled, so that a part of the high-temperature exhaust gas is forced to remain in a combustion chamber, and certain energy is provided for gasification and rapid combustion of fuel in the next cycle of the rotary engine 1; on the other hand, an exhaust connecting pipe 5 is additionally arranged on an exhaust manifold 3 of the rotary engine 1 and is communicated with an intake manifold 2 at the downstream of a throttle valve 4, an EGR valve 6 is arranged on the exhaust connecting pipe 5, and the opening degree of the EGR valve 6 is adjusted to control the flow rate of high-temperature exhaust gas which flows into the intake manifold 2 again, so that certain energy is provided for fuel gasification and rapid combustion in a combustion chamber of the rotary engine 1, and the purpose of accelerating combustion of mixed gas in a cylinder is achieved.

The specific process of the above method will be described in detail below by taking the jet engine 1 as an example, which uses aviation kerosene as fuel:

during cold start, the backpressure valve 7 is fully closed under the control of the electronic control unit 9 or the EGR valve 6 is fully opened under the control of the ECU, most of the high temperature exhaust gas is retained in the combustion chamber or enters the intake manifold 2 and the combustion chamber through the EGR valve 6 through the exhaust connection pipe 5, an internal hot exhaust gas atmosphere with a high concentration ratio is formed in the cylinder, these high temperature exhaust gases will heat the aviation kerosene fuel oil droplets which are injected into the intake manifold 2 and the combustion chamber through the fuel injector 8 in the intake process, accelerate the atomization thereof and form a relatively uniform combustible mixture with air in the intake and compression processes, most combustible mixed gas in the combustion chamber in the subsequent working process is ignited and combusted almost at the same time under the triggering of ignition of the spark plug 10 and the heating of high-temperature waste gas, and flame rapidly spreads throughout the whole long and narrow combustion chamber, so that the effects of shortening the combustion duration and improving the heat-work conversion efficiency are achieved.

Under the working conditions of low load and medium load, the back pressure valve 7 or the EGR valve 6 is partially closed or partially opened under the control of an electronic control unit 9(ECU), a part of high-temperature waste gas is retained in the combustion chamber or enters the air inlet manifold 2 and the combustion chamber through the EGR valve 6 through the exhaust connecting pipe 5, a certain proportion of high-temperature waste gas is formed in the cylinder, the waste gas can also heat aviation kerosene fuel oil drops which are sprayed into the air inlet manifold 2 and the combustion chamber through an oil sprayer 8 in the air inlet process, the atomization of the waste gas is accelerated, and the waste gas and air form uniform combustible mixed gas in the air inlet and compression processes, most of the combustible mixed gas in the combustion chamber in the work applying process is ignited and combusted under the triggering of ignition of a spark plug 10 and the heating of the high-temperature waste gas at the same time, and the flame is rapidly spread to the whole long and narrow combustion chamber, so that the combustion duration is shortened and the heat power conversion efficiency is improved.

Under large load and full load conditions, in order to reduce exhaust back pressure, the back pressure valve 7 is fully opened or the EGR valve 6 is fully closed, a small part of high-temperature exhaust gas is left in a combustion chamber, and fuel mixture is still combusted in a traditional spark ignition and flame propagation mode to meet the requirements of dynamic property and power-to-weight ratio.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated. The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. A system for reducing fuel consumption of a rotary engine, the rotary engine (1) has an intake manifold (2) and an exhaust manifold (3), characterized in that: the exhaust manifold (3) and the The intake manifold (2) downstream of the valve (4) is communicated through the exhaust manifold (5), the exhaust manifold (5) is provided with an EGR valve (6), and the exhaust manifold (3) is located on the A back pressure valve (7) is arranged downstream of the exhaust pipe (5).

2 . The system according to claim 1 , wherein the EGR valve ( 6 ) and the back pressure valve ( 7 ) adopt valve structures of electronic control, mechanical control or vacuum control. 3 .

3. The system according to claim 2, characterized in that: a fuel injector (8) is provided on the intake manifold (2) between the exhaust pipe (5) and the throttle valve (4). );or,

A fuel injector (8) is provided on the cylinder block of the rotary engine (1).

4. The system according to claim 3, characterized in that: the EGR valve (6), the back pressure valve (7), the throttle valve (4) and the fuel injector (8) all pass through the same electronic control unit (9) )control.

5. The system according to any one of claims 1-3, wherein the fuel used by the rotary engine (1) is gasoline, aviation kerosene or diesel.

6. The system according to any one of claims 1-3, wherein a spark plug (10) is provided on the rotary engine (1).