CN108644010B - Low-resistance gasoline engine - Google Patents
Low-resistance gasoline engine Download PDFInfo
- Publication number
- CN108644010B CN108644010B CN201810456408.8A CN201810456408A CN108644010B CN 108644010 B CN108644010 B CN 108644010B CN 201810456408 A CN201810456408 A CN 201810456408A CN 108644010 B CN108644010 B CN 108644010B
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- Prior art keywords
- valve
- air
- cylinder
- air inlet
- pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention discloses a low-resistance gasoline engine which comprises an air cylinder and a crankcase, wherein the air cylinder consists of an air cylinder body and a piston, a connecting rod is arranged in the crankcase, one end of the connecting rod is connected with the piston, a combustion chamber and a backflow air passage are arranged at the upper part of the air cylinder, an oil sprayer is arranged at the top end of the air cylinder, an air inlet pipe is arranged at one side of the air cylinder, an air inlet valve is arranged at the position of the air inlet pipe, an exhaust pipe is arranged at the other side of the air cylinder, an exhaust valve is arranged at the position of the exhaust pipe of the air cylinder, an air flow meter is arranged on the air. The invention removes the throttle valve from the intake pipe, thereby reducing the intake resistance in the intake pipe and reducing the pumping loss of the gasoline engine.
Description
Technical Field
The invention relates to the technical field of gasoline engines, in particular to a low-resistance gasoline engine.
Background
For the gasoline engine with natural air suction, the fuel injector sprays gasoline into the air inlet pipe to fully mix the gasoline with air entering the air inlet pipe, and then in the air inlet stroke of the gasoline engine, the mixed gas is sucked into the cylinder from the air inlet valve due to the vacuum degree generated in the cylinder in the downward moving process of the piston. In this process, a throttle valve located in the intake pipe functions to control the amount of intake air, and the opening degree of the throttle valve is controlled by an accelerator pedal.
When the opening of the throttle valve is small, the air flow speed in the air inlet pipe is low, the air inflow in unit time is small, the oil injection quantity of the corresponding oil injector is also small, at the moment, less mixed gas enters the cylinder, and the output power of the gasoline engine is small; when the opening of the throttle valve is larger, the air flow speed in the air inlet pipe is high, the air inflow in unit time is large, the oil injection quantity of the corresponding oil injector is also large, at the moment, more mixed gas enters the cylinder, and the output power of the gasoline engine is large.
When the gasoline engine is in an intake stroke, the piston moves downwards to form a vacuum degree in the cylinder, the mixed gas in the air inlet pipe is sucked into the cylinder by utilizing the vacuum degree, and due to the blocking effect of the throttle valve, a certain resistance is generated in the process that the piston moves downwards to suck the gas, and the resistance needs to be overcome by power generated by applying work before the engine, so that a certain engine power, namely a part of mechanical energy generated by the engine, needs to be consumed in the intake stroke, and the part of the lost mechanical energy is called pumping loss.
It is apparent that, as the opening degree of the throttle valve is smaller, the intake resistance is larger, and the engine mechanical energy lost by the engine to overcome the intake resistance is larger, that is, the pumping loss is larger. Therefore, when the engine is in a low load operating condition, pumping losses from the engine will severely impair the engine's ability to do work externally.
The object of the present invention is to remove a throttle valve from an intake pipe, thereby reducing intake resistance in the intake pipe, and thus reducing pumping loss of a gasoline engine.
Disclosure of Invention
The invention aims to provide a low-resistance gasoline engine to reduce the pumping loss of the gasoline engine.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a low-resistance gasoline engine, includes cylinder and crankcase, the cylinder comprises cylinder block and piston, be provided with the connecting rod in the crankcase, connecting rod one end and piston connection, cylinder upper portion is provided with combustion chamber and backward flow air flue, the cylinder top is provided with the sprayer, cylinder one side is provided with the intake pipe, and the cylinder is located intake pipe department and is provided with the (air) intake valve, and the sprayer is used for spouting into the intake pipe with petrol in, and the cylinder opposite side is provided with the blast pipe, and the cylinder is located blast pipe department and is provided with the exhaust valve, install air flow meter in the intake pipe, the intake pipe is through backward flow trachea and backward flow air flue.
Preferably, the differential pressure valve comprises a valve body, a spring, a valve block, a guide rod, a valve hole, a guide hole and a valve seat, the valve seat is arranged in the valve body, the guide hole is formed in the valve seat, the guide rod is arranged in the guide hole and connected with the valve block, the spring is arranged on one side, away from the guide rod, of the valve block, and the spring is arranged between the valve block and the inner wall of the valve body.
Preferably, the guide rod is a sliding fit in a guide hole in the valve body.
Preferably, the differential pressure valve is located between the throttle valve and the return air duct.
Compared with the prior art, the invention has the beneficial effects that: the invention removes the throttle valve from the air inlet pipe, thereby reducing the air inlet resistance in the air inlet pipe and reducing the pumping loss of the gasoline engine; the throttle valve is arranged on the return air pipe, and the quantity of the mixed gas flowing back into the air inlet pipe is controlled by utilizing the opening time and the opening degree of the throttle valve in the compression stroke, so that the quantity of the mixed gas remained in the air cylinder is controlled, the power generated by the mixed gas in each combustion process is controlled, and the technical effect of accurately controlling the power of the engine while the air inlet resistance is reduced is realized.
The automatic opening and closing effect is realized by utilizing the cooperation among the spring, the valve body and the valve seat of the differential pressure valve, the reaction is more sensitive and quicker, the reliability is higher, the protection effect of the differential pressure valve on the throttle valve is improved, and the impact of high-temperature and high-pressure gas on the throttle valve is prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the differential pressure valve of the present invention.
Fig. 3 is a schematic view of the intake stroke configuration of the present invention.
Fig. 4 is a schematic view of the compression stroke configuration of the present invention.
Fig. 5 is a schematic diagram of the power stroke structure of the present invention.
FIG. 6 is a schematic diagram of the exhaust stroke configuration of the present invention.
In the figure: 1-a crankcase; 2-a connecting rod; 3-a cylinder block; 4-a piston; 5-air cylinder; 6-an inlet valve; 7-a throttle valve; 8, an air inlet pipe; 9-oil injector; 10-a combustion chamber; 11-an exhaust pipe; 12-an exhaust valve; 13-an air flow meter; 14-reflux airway; 15-a differential pressure valve; 150-a valve body; 151-spring; 152-a valve block; 153-guide bar; 154-valve bore; 155-a guide hole; 156-valve seat; 16-reflux gas tube.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1-6, the present invention provides a technical solution: a low-resistance gasoline engine comprises a cylinder 5 and a crankcase 1, wherein the cylinder 5 consists of a cylinder body 3 and a piston 4, a connecting rod 2 is arranged in the crankcase 1, one end of the connecting rod 2 is connected with the piston 4, a combustion chamber 10 and a backflow air passage 14 are arranged at the upper part of the cylinder 5, an oil injector 9 is arranged at the top end of the cylinder 5, an air inlet pipe 8 is arranged at one side of the cylinder 5, the oil injector 9 is used for injecting gasoline into the air inlet pipe 8, an air inlet valve 6 is arranged at the position, located at the air inlet pipe 8, of the cylinder 5, the oil injector 9 injects the gasoline into the air inlet pipe 8, an exhaust pipe 11 is arranged at the other side of the cylinder 5, an exhaust valve 12 is arranged at the position, located at the exhaust pipe 11, an air flow meter 13 is arranged on the air inlet pipe 8, the air inlet pipe 8, The pressure difference valve comprises a guide rod 153, a valve hole 154, a guide hole 155 and a valve seat 156, wherein the valve seat 156 is arranged in the valve body 150, the guide hole 155 is arranged on the valve seat 156, the guide rod 153 is arranged in the guide hole 155, the outer end of the guide rod 153 is connected with a valve block 152, one side, far away from the guide rod 153, of the valve block 152 is provided with a spring 151, the spring 151 is arranged between the valve block 152 and the inner wall of the valve body 150, the guide rod 153 is in sliding fit in the guide hole 155 in the valve body.
The working principle is as follows: 1. an intake stroke: the air inlet valve 6 is opened, the exhaust valve 12 is closed, the piston 4 moves downwards, outside air enters the air inlet pipe 8, the air directly reaches the tail end of the air inlet pipe after passing through the air flow meter 13, the oil injector 9 at the tail end of the air inlet pipe 8 injects gasoline into the air inlet pipe 8, and mixed gas formed by mixing the air and the injected gasoline enters the air cylinder 5 through the air inlet valve 6; at this time, the throttle valve 7 is fully closed, so that the air in the return air pipe 16 is prevented from being sucked into the cylinder through the return air passage 14 in the reverse direction due to the negative pressure in the cylinder 5 in the intake stroke, and the air in the intake pipe 8 is also prevented from entering the cylinder 5 through the return air pipe 16; in the process, the air inlet pipe 8 is not blocked by the throttle valve 7, so that the air inlet resistance is smaller, the pumping loss is smaller, and the air inlet efficiency is higher; preferably, in the intake stroke, the throttle valve 7 is fully opened, so that a part of the outside air enters the cylinder 5 through the return air pipe 16 and the return air passage 14, an intake passage is added, the air intake amount in unit time is improved, and the air intake efficiency is further improved.
2. Compression stroke: the air inlet valve 6 and the air outlet valve 12 are both closed, the piston 4 moves upwards, the opening degree and the opening time of the throttle valve 7 are adjusted according to requirements, and under the action of the piston 4 moving upwards, a part of mixed air in the air cylinder 5 returns to the air inlet pipe 8 after passing through the return air passage 14, the differential pressure valve 15 on the return air pipe 16 and the throttle valve 7, and then enters the air cylinder 5 in the next air inlet stroke along with newly entering air; in this process, the amount of the mixture gas flowing back is adjusted by the opening degree and the opening time of the throttle valve 7, so that the amount of the mixture gas remaining in the cylinder 5 becomes the actually required amount; in this stroke, the pressure in the cylinder 5 is low, and the differential pressure between both sides of the valve block 152 is lower than the set value at which it is closed, so that the return gas can smoothly pass through the differential pressure valve 15.
3. And (3) power stroke: the intake valve 6, the exhaust valve 12 and the throttle valve 7 are all closed, the spark plug ignites the mixed gas, the piston 4 is pushed to descend from the top dead center by the high-temperature and high-pressure exhaust gas after combustion, at the moment, the high-pressure exhaust gas reaches the right side of a valve block 152 of the differential pressure valve 15, the differential pressure of the left side and the right side of the valve block 152 exceeds a set value, the valve block 152 moves leftwards by overcoming the pulling force of a spring 151 and is pressed on a valve seat 156, and therefore a valve hole 154 is closed, and the gas on the right side of; thereby preventing the high-temperature and high-pressure exhaust gas after combustion from impacting the throttle valve 7 and protecting the throttle valve 7 from being damaged.
4. Exhaust stroke: the exhaust valve 12 is opened, the intake valve 6 and the throttle valve 7 are still closed, the piston 4 moves upwards, and the exhaust gas in the cylinder 5 is pressed out of the exhaust valve 12 by the piston 4; at this time, because the pressure of the exhaust gas in the cylinder is still high, the air pressure on the right side of the valve block 152 is far higher than the air pressure on the left side of the valve block, the valve block 152 is still tightly pressed against the valve seat 156 under the action of the pressure difference between the two sides, and the differential pressure valve 15 is in a closed state; the engine then cycles through the intake stroke again.
In the complete working cycle consisting of the four strokes, the gas which flows back through the throttle valve 7 is air and gasoline mixture which comes out of the cylinder 5 and is mixed with gasoline molecules, but the mixture enters the air inlet pipe 8 behind the air flow meter through the return air pipe 16 and is sucked into the cylinder 5 in the next air inlet stroke along with the newly-entered air in the air inlet pipe 8; therefore, the mixture gas flowing back to the intake pipe 8 is not metered by the air flow meter 13, the air flow meter 13 only meters the total amount of the outside air entering the intake pipe 8, and the fuel injector 9 is controlled to inject the gasoline with a certain proportion to the tail end of the intake pipe 8 according to the total amount of the air, so that the gasoline is matched with the total amount of the air.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A low resistance gasoline engine comprises a cylinder (5) and a crankcase (1), and is characterized in that: the cylinder (5) is composed of a cylinder body (3) and a piston (4), a connecting rod (2) is arranged in the crankcase (1), one end of the connecting rod (2) is connected with the piston (4), a combustion chamber (10) and a backflow air passage (14) are arranged on the upper portion of the cylinder (5), an oil sprayer (9) is arranged at the top end of the cylinder (5), the oil sprayer (9) is used for spraying gasoline into an air inlet pipe (8), an air inlet pipe (8) is arranged on one side of the cylinder (5), an air inlet valve (6) is arranged at the position, located in the air inlet pipe (8), of the cylinder (5), an exhaust pipe (11) is arranged on the other side of the cylinder (5), an exhaust valve (12) is arranged at the position, located in the exhaust pipe (11), an air flow meter (13) is installed on the air inlet pipe (8), and the air, the mixed gas which flows back through the throttle valve (7) enters an air inlet pipe (8) behind the air flow meter through a back flow air pipe (16), and the throttle valve (7) and a differential pressure valve (15) are arranged on the back flow air pipe (16).
2. The low drag gasoline engine of claim 1 wherein: the differential pressure valve (15) is composed of a valve body (150), a spring (151), a valve block (152), a guide rod (153), a valve hole (154), a guide hole (155) and a valve seat (156), the valve seat (156) is arranged in the valve body (150), the guide hole (155) is arranged in the valve seat (156), the guide rod (153) is arranged in the guide hole (155), the valve block (152) is connected to the outer end of the guide rod (153), the spring (151) is arranged on one side, away from the guide rod (153), of the valve block (152), and the spring (151) is arranged between the valve block (152) and the inner wall of the valve.
3. The low drag gasoline engine of claim 2 wherein: the guide rod (153) is a sliding fit within a guide hole (155) in the valve body.
4. The low drag gasoline engine of claim 1 wherein: the differential pressure valve (15) is located between the throttle valve (7) and the return air duct (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810456408.8A CN108644010B (en) | 2018-05-14 | 2018-05-14 | Low-resistance gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810456408.8A CN108644010B (en) | 2018-05-14 | 2018-05-14 | Low-resistance gasoline engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108644010A CN108644010A (en) | 2018-10-12 |
| CN108644010B true CN108644010B (en) | 2020-08-25 |
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ID=63755208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810456408.8A Active CN108644010B (en) | 2018-05-14 | 2018-05-14 | Low-resistance gasoline engine |
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| Country | Link |
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| CN (1) | CN108644010B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0639708A1 (en) * | 1993-08-19 | 1995-02-22 | Audi Ag | Method for operating a vehicular internal combustion engine |
| DE19612451A1 (en) * | 1996-03-28 | 1997-10-02 | Siemens Ag | Intake system for an internal combustion engine |
| CN101818708A (en) * | 2010-04-22 | 2010-09-01 | 杨更新 | Electronic fuel injection internal combustion engine without throttle plate |
| CN102121437A (en) * | 2010-01-08 | 2011-07-13 | 福特环球技术公司 | System and method for providing intake air to engine in vehicle |
| CN102477877A (en) * | 2010-11-24 | 2012-05-30 | 南京理工大学 | Efficient and quick starting method of engine applying solenoid-driven valves |
| CN103270288A (en) * | 2011-08-24 | 2013-08-28 | 丰田自动车株式会社 | Fluid control device and fuel supply system |
| CN104343590A (en) * | 2013-08-08 | 2015-02-11 | 福特环球技术公司 | Systems and methods for multiple aspirators for a constant pump rate |
-
2018
- 2018-05-14 CN CN201810456408.8A patent/CN108644010B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0639708A1 (en) * | 1993-08-19 | 1995-02-22 | Audi Ag | Method for operating a vehicular internal combustion engine |
| DE19612451A1 (en) * | 1996-03-28 | 1997-10-02 | Siemens Ag | Intake system for an internal combustion engine |
| CN102121437A (en) * | 2010-01-08 | 2011-07-13 | 福特环球技术公司 | System and method for providing intake air to engine in vehicle |
| CN101818708A (en) * | 2010-04-22 | 2010-09-01 | 杨更新 | Electronic fuel injection internal combustion engine without throttle plate |
| CN102477877A (en) * | 2010-11-24 | 2012-05-30 | 南京理工大学 | Efficient and quick starting method of engine applying solenoid-driven valves |
| CN103270288A (en) * | 2011-08-24 | 2013-08-28 | 丰田自动车株式会社 | Fluid control device and fuel supply system |
| CN104343590A (en) * | 2013-08-08 | 2015-02-11 | 福特环球技术公司 | Systems and methods for multiple aspirators for a constant pump rate |
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| Publication number | Publication date |
|---|---|
| CN108644010A (en) | 2018-10-12 |
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