CN219795382U - Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system - Google Patents
Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system Download PDFInfo
- Publication number
- CN219795382U CN219795382U CN202321085954.8U CN202321085954U CN219795382U CN 219795382 U CN219795382 U CN 219795382U CN 202321085954 U CN202321085954 U CN 202321085954U CN 219795382 U CN219795382 U CN 219795382U
- Authority
- CN
- China
- Prior art keywords
- air
- pressure
- constant
- engine
- supplementing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 53
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000013589 supplement Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Supercharger (AREA)
Abstract
The utility model discloses a low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of an engine, which comprises a constant-pressure air supplementing and storing tank, a relay valve and a second one-way valve; compressed air output by the constant-pressure air supplementing air storage tank is subjected to constant-pressure air supplementing and boosting through the relay valve and an engine air inlet manifold in the second one-way valve. When the engine is at low speed, the constant-pressure air supplementing air storage tank supplements air to the air inlet manifold of the engine at constant pressure, so that the natural frequency of the pressure wave of the air inlet manifold is constant, and under the condition that the dynamic effect technology of the air inlet manifold is not influenced, the constant-pressure air supplementing and boosting technology is utilized, the air charging density is improved, the air inflow is increased, and the low-speed torque performance and the acceleration performance of the engine are improved.
Description
Technical Field
The utility model relates to the field of vehicle engines, in particular to a low-speed constant-pressure air supplementing, supercharging and torque increasing system of an engine.
Background
Supercharging is a measure of compressing and supplying air into a cylinder to increase charge density and increase intake air amount. The purpose of the boost is to increase power. Since the circulation oil supply amount is correspondingly increased with the increase of the air amount, the power can be increased. The supercharged engine has the advantages of high power, low oil consumption, less pollution discharge and the like. However, the existing exhaust gas turbocharged diesel engine has poor torque performance and poor acceleration performance at low speed, mainly because the exhaust gas energy is small at low speed, the exhaust gas turbocharger does not work, the supercharging pressure is insufficient, the air inflow is insufficient, and the torque reserve coefficient is low. The boost pressure rises slowly during acceleration, so that the increase of the rotation speed and the average effective pressure of the diesel engine is carried out for a longer period of time, and the smoke intensity is increased during acceleration. In order to solve the above problems, patent publication No. CN104500214a discloses an engine supercharging system with a compressed air storage device and a vehicle having the same, in which when the energy of exhaust gas is more, more compressed air than needed by an engine is generated by an exhaust gas turbocharger and stored in the compressed air storage device, and when the engine accelerates, compressed air can be rapidly provided for the engine, thereby not only improving the utilization rate of exhaust gas, but also improving the transient response performance of the engine. However, this solution has the following drawbacks: as the engine intermittently charges, the pressure at the intake valve is high and low, creating a pressure wave that propagates back and forth within the engine intake manifold, i.e., a surge effect. The positive pressure wave is used to increase the intake pressure before the intake valve closes, and to increase the engine charging efficiency, which is known as the intake manifold dynamic effect. According to the technical scheme, the compressed air storage device is communicated with the air inlet manifold, at the moment, air in the compressed air storage device also produces pressure fluctuation, so that air waves of cylinders of the engine are mutually interfered, the pressure waves are very complex to change in the pipeline, the natural frequency of the pressure waves is changed, the situation that the air inlet frequency is unchanged cannot be ensured to be exactly coincident with positive pressure waves in the next valve opening period, the air inlet pressure before closing of the air inlet valve cannot be improved by utilizing the positive pressure waves, and the air charging efficiency of the engine is improved.
Disclosure of Invention
In view of this, the utility model provides a low-speed constant-pressure air supplementing, pressurizing and torsion increasing system for an engine, and the constant-pressure air supplementing and storing tank supplements air to an air inlet manifold of the engine at constant pressure, so that the natural frequency of the pressure wave of the air inlet manifold is constant, and the dynamic effect technology and the constant-pressure air supplementing and pressurizing technology of the air inlet manifold are fully utilized, thereby improving the low-speed torque performance and the acceleration performance of the engine.
On one hand, the utility model provides a low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of an engine, which comprises a constant-pressure air supplementing and storing tank, a relay valve and a second one-way valve; compressed air output by the constant-pressure air supplementing air storage tank is subjected to constant-pressure air supplementing and boosting through the relay valve and an engine air inlet manifold in the second one-way valve.
In a further technical scheme, the device comprises an air storage cylinder, a pressure regulating valve, a first control valve, a second control valve and a first one-way valve; the air cylinder is communicated with the P port of the first control valve and the P port of the second control valve, the A port of the second control valve is connected with the control port X of the relay valve, and the second control valve controls the relay valve to be switched on and off; compressed air output by the air storage cylinder is inflated to the constant-pressure air supplementing air storage tank through the first control valve, the first one-way valve and the pressure regulating valve.
In a further technical scheme, the engine air intake system comprises a filter, wherein two ends of the filter are respectively connected with a second one-way valve and an engine air intake manifold; compressed air output by the constant-pressure air supplementing air storage tank is subjected to constant-pressure air supplementing and boosting through the relay valve, the second one-way valve and an engine air inlet manifold in the filter.
In a further technical scheme, the engine comprises an exhaust gas turbocharger and an intercooler, wherein an air outlet of the intercooler is connected with an engine intake manifold, and an air inlet of the intercooler is connected with an air outlet of the exhaust gas turbocharger.
In a further technical scheme, the air storage device comprises an air pump and a drying bottle, and compressed air of the air pump enters the air storage cylinder after passing through the drying bottle.
In a further aspect, the relay valve is opened at less than 1500 rpm of the engine.
In a further technical scheme, the first control valve is opened when the air pressure of the air storage cylinder is more than 0.7MPa, and is closed when the air pressure of the air storage cylinder is less than 0.5 MPa.
Compared with the prior art, the low-speed constant-pressure air supplementing, pressurizing and torque increasing system of the engine has the beneficial effects that:
because the compressed air of the constant-pressure air supplementing and storing tank is provided by the air storing tank of the original vehicle braking system, the pressure of the constant-pressure air supplementing and storing tank is regulated by the pressure regulating valve, and the constant pressure of the constant-pressure air supplementing and storing tank is ensured. In addition, the constant-pressure air supplementing and storing tank is used for supplementing air and boosting pressure to the air inlet manifold of the engine through the second one-way valve, and air of the air inlet manifold cannot enter the constant-pressure air supplementing and storing tank through the second one-way valve, so that the pressure in the constant-pressure air supplementing and storing tank cannot fluctuate along with pressure fluctuation of the air inlet manifold, the pressure in the constant-pressure air supplementing and storing tank is kept relatively constant, the natural frequency of pressure waves of the air inlet manifold is kept constant, the air charging density is improved, the air inflow is increased, and the low-speed torque performance and the acceleration performance of the engine are improved by utilizing the constant-pressure air supplementing and boosting technology under the condition that the dynamic effect technology of the air inlet manifold is not influenced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of a low-speed constant-pressure air supplementing, pressurizing and torque increasing system of an engine.
Description of the embodiments
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the utility model provides a low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of an engine, which comprises an air storage cylinder, a constant-pressure air supplementing and storing cylinder 4, a relay valve 3, a second one-way valve 2, a pressure regulating valve 5, a first control valve 7, a second control valve 8, a first one-way valve 6 and a filter 1; the two ends of the filter 1 are respectively connected with a second one-way valve 2 and an engine intake manifold; the gas outlet of the intercooler is connected with the engine intake manifold, and the gas inlet of the intercooler is connected with the gas outlet of the exhaust gas turbocharger.
Compressed air of the air pump enters the air storage cylinder after passing through the drying bottle, the air storage cylinder, the air pump and the drying bottle are an original vehicle braking air system, the original vehicle normal pressure air storage cylinder is set to have air pressure of 0.8MPa, two air supply air paths are separated from the original vehicle normal pressure air storage cylinder, the air storage cylinder is communicated with the P port of the first control valve 7 and the P port of the second control valve 8, the A port of the second control valve 8 is connected with the control port X of the relay valve 3, and the second control valve 8 controls the on-off of the relay valve 3. When the air pressure of the normal-pressure air storage cylinder of the original vehicle is greater than 0.7MPa, the first control valve 7 is opened, and compressed air output by the air storage cylinder is inflated to the constant-pressure air supplementing air storage tank 4 through the first control valve 7, the first one-way valve 6 and the pressure regulating valve 5. When the air pressure of the normal pressure air storage cylinder of the original vehicle is less than 0.5MPa, the first control valve 7 is closed. Compressed air output by the constant-pressure air supplementing and storing tank 4 is subjected to constant-pressure air supplementing and boosting through the relay valve 3, the second one-way valve 2 and an engine air inlet manifold in the filter 1. The second control valve 8 is energized and the relay valve 3 is opened at engine speeds below 1500 rpm.
The engine is accelerated with load, at the moment, the rotation speed of the engine is lower than 1500 rpm and higher than the idle speed of the engine by 800 rpm, the second control valve 8 is electrified, the relay valve 3 is opened, and the compressed air output by the constant-pressure air supplementing air storage tank 4 is subjected to constant-pressure air supplementing and boosting through the relay valve 3, the second one-way valve 2 and an engine air inlet manifold in the filter 1. The pressure in the constant-pressure air supplementing and storing tank 4 cannot fluctuate along with the pressure fluctuation of the air inlet manifold, the pressure in the constant-pressure air supplementing and storing tank 4 is kept relatively constant, the dynamic effect of the air inlet manifold of the original engine cannot be changed, the natural frequency of the pressure wave of the air inlet manifold is unchanged, the constant-pressure air supplementing and boosting technology is utilized under the condition that the technology utilizing the dynamic effect of the air inlet manifold is not influenced, the air charging density is improved, the air inflow is increased, and the low-speed torque performance and the acceleration performance of the engine are improved. The engine of the utility model obviously improves the low-speed torque performance and the on-load acceleration capability of the engine in the area with the altitude of 1500 meters on the plateau. The engine speed is higher than 1500 rpm, the exhaust energy increases and the exhaust turbocharger is operating normally, at which time the second control valve 8 is de-energized and the relay valve 3 is closed.
The techniques not described above are common general knowledge to a person skilled in the art. The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (7)
1. The low-speed constant-pressure air supplementing, pressurizing and torque increasing system of the engine is characterized by comprising a constant-pressure air supplementing and storing tank (4), a relay valve (3) and a second one-way valve (2); compressed air output by the constant-pressure air supplementing and storing tank (4) is subjected to constant-pressure air supplementing and boosting through an engine air inlet manifold in the relay valve (3) and the second one-way valve (2).
2. The low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of the engine according to claim 1, which is characterized by comprising an air storage cylinder, a pressure regulating valve (5), a first control valve (7), a second control valve (8) and a first one-way valve (6); the air reservoir is communicated with the P port of the first control valve (7) and the P port of the second control valve (8), the A port of the second control valve (8) is connected with the control port X of the relay valve (3), and the second control valve (8) controls the on-off of the relay valve (3); compressed air output by the air storage cylinder is inflated to the constant-pressure air supplementing air storage tank (4) through the first control valve (7), the first one-way valve (6) and the pressure regulating valve (5).
3. The low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of the engine according to claim 1 is characterized by comprising a filter (1), wherein two ends of the filter (1) are respectively connected with a second one-way valve (2) and an engine intake manifold; compressed air output by the constant-pressure air supplementing and storing tank (4) is subjected to constant-pressure air supplementing and boosting through the relay valve (3) and the second one-way valve (2) and an engine air inlet manifold in the filter (1).
4. The low-speed constant-pressure air supplementing, pressurizing and torque increasing system of the engine according to claim 1, comprising an exhaust gas turbocharger and an intercooler, wherein an air outlet of the intercooler is connected with an engine intake manifold, and an air inlet of the intercooler is connected with an air outlet of the exhaust gas turbocharger.
5. The low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of the engine according to claim 2, wherein the system comprises an air pump and a drying bottle, and compressed air of the air pump enters the air storage cylinder after passing through the drying bottle.
6. The low-speed constant-pressure air supplementing, supercharging and torque increasing system of an engine according to claim 1, wherein the relay valve (3) is opened under 1500 rpm of the engine.
7. The low-speed constant-pressure air supplementing, pressurizing and torsion increasing system of the engine according to claim 1, wherein the first control valve (7) is opened when the air pressure of the air storage cylinder is more than 0.7MPa, and is closed when the air pressure of the air storage cylinder is less than 0.5 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321085954.8U CN219795382U (en) | 2023-05-08 | 2023-05-08 | Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321085954.8U CN219795382U (en) | 2023-05-08 | 2023-05-08 | Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219795382U true CN219795382U (en) | 2023-10-03 |
Family
ID=88188143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321085954.8U Active CN219795382U (en) | 2023-05-08 | 2023-05-08 | Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219795382U (en) |
-
2023
- 2023-05-08 CN CN202321085954.8U patent/CN219795382U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100535407C (en) | Adjustable high boost system with structure of series-parallel connection of turbochargers in different size | |
| CN102278193B (en) | Auxiliary pressurization system of internal combustion engine | |
| CN103615309A (en) | All-work-condition adjustable two-stage pressurizing system of internal combustion engine | |
| CN109372662A (en) | Waste gas bypass auxiliary pressurization system | |
| CN111894772A (en) | Engine supercharging air intake system and control method thereof | |
| CN109098837A (en) | Energy-saving auxiliary supercharging system of engine | |
| CN110552781B (en) | Control method of throttle-free air intake pressurization direct-injection hydrogen rotor machine | |
| CN108412606A (en) | Energy-saving pressurization system of air compressor for vehicle | |
| CN208040519U (en) | Energy-saving pressurization system of air compressor for vehicle | |
| CN110500174A (en) | The parallel electronic pressure charging system of one kind and its control method | |
| CN109339938A (en) | Three condition two-stage consecutive pressurization system and its control method | |
| CN209908690U (en) | Pressure boost separation and reunion formula air compressor machine system | |
| CN209115193U (en) | Energy-saving auxiliary supercharging system of engine | |
| CN208396807U (en) | Engine system of mechanical pressure boost compensation | |
| CN109372628A (en) | Electric supercharging diesel engine system for realizing Miller cycle | |
| CN210068309U (en) | Auxiliary supercharging engine turbocharging system | |
| CN219795382U (en) | Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system | |
| CN2804406Y (en) | Pressure variable oxygen producing burning aid for turbocharged engine | |
| CN110552783B (en) | Control method of supercharged Wankel hydrogen rotary engine | |
| CN104329148A (en) | Two-stage power turbine system | |
| JP2016125365A (en) | Internal combustion engine | |
| CN204163812U (en) | Waste gas bypass power turbine system | |
| CN116464548A (en) | Engine low-speed constant-pressure air supplementing, pressurizing and torque increasing system | |
| WO2000065210A1 (en) | A storage prebooster to improve the responsiveness of turbocharged internal combustion engines | |
| CN202100325U (en) | Auxiliary supercharging system of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |