CN111550306A - Engine air inlet supercharging system and control method thereof - Google Patents

Engine air inlet supercharging system and control method thereof Download PDF

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Publication number
CN111550306A
CN111550306A CN202010502255.3A CN202010502255A CN111550306A CN 111550306 A CN111550306 A CN 111550306A CN 202010502255 A CN202010502255 A CN 202010502255A CN 111550306 A CN111550306 A CN 111550306A
Authority
CN
China
Prior art keywords
air
air inlet
cylinder
engine
intake
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.)
Pending
Application number
CN202010502255.3A
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Chinese (zh)
Inventor
王世强
王长江
饶译鹏
王剑
阎全忠
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Hanteng New Energy Automobile Technology Co ltd
Original Assignee
Hanteng New Energy Automobile Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hanteng New Energy Automobile Technology Co ltd filed Critical Hanteng New Energy Automobile Technology Co ltd
Priority to CN202010502255.3A priority Critical patent/CN111550306A/en
Publication of CN111550306A publication Critical patent/CN111550306A/en
Pending legal-status Critical Current

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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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F02B33/28—Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups F02B33/02 - F02B33/26
    • F02B33/30—Control of inlet or outlet ports
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D23/00—Controlling engines characterised by their being supercharged
    • F02D23/005—Controlling engines characterised by their being supercharged with the supercharger being mechanically driven by the engine
    • 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

Abstract

The invention provides an engine air inlet supercharging system which comprises a control part, a non-supercharged air inlet part and a supercharged air inlet part, wherein the control part can be communicated with an engine management system, the supercharged air inlet part can be communicated with the non-supercharged air inlet part, the control part can control the communication or the interruption of the non-supercharged air inlet part and the supercharged air inlet part with a combustion cylinder, the supercharged air inlet part comprises a supercharged cylinder driven by a crankshaft of an engine and an air storage tank communicated with the combustion cylinder, and the supercharged cylinder is provided with an inlet valve communicated with the non-supercharged air inlet part, a first exhaust valve communicated with the air storage tank and a second exhaust valve communicated with the non-supercharged air inlet part. The invention also provides a control method of the engine air inlet supercharging system. The invention can further compress the fresh air to provide the air inlet with the needed compression ratio for the combustion cylinder of the engine by arranging the supercharging cylinder which can be driven by the crankshaft of the engine, and can reduce the energy consumption and the cost of the supercharging equipment.

Description

Engine air inlet supercharging system and control method thereof
Technical Field
The invention relates to the technical field of engine air inlet supercharging systems, in particular to an engine air inlet supercharging system and a control method thereof.
Background
Conventional engine air intake systems are naturally aspirated, however, when fuel injection is increased and more oxygen is required for combustion, more air is generally supplied only by expanding the intake area. In order to improve an air intake system and increase air intake amount, a turbocharging technology and a multi-stage turbocharger are invented. With the further development of the technology, a technology of pushing a fresh air compressor to supply air to an engine by using an exhaust expander is developed to increase the oxygen content in the same air supply amount.
The specification of the Chinese invention patent CN 201611111567.1 discloses an engine air intake system, which comprises an electric supercharger, a bypass pipeline and a controller, wherein the electric supercharger is connected with the bypass pipeline in parallel, and the controller is used for controlling the opening and closing of the electric supercharger and the bypass pipeline; when the rotating speed of the engine exceeds a first set rotating speed, the controller controls the electric supercharger to be started, and the bypass pipeline is closed; when the rotating speed of the engine exceeds a second set rotating speed, the controller controls the electric supercharger to be closed, and the bypass pipeline is opened; the first set rotational speed is less than the second set rotational speed.
In the specification of the chinese invention patent CN 201810784820.2, an engine supercharging air intake system is disclosed, which comprises a high pressure air storage tank, a high pressure air pipe, a high pressure nozzle and a supercharging control unit, one end of the high-pressure air pipe is communicated with the high-pressure air storage tank, the other end of the high-pressure air pipe is communicated with the engine cylinder through a high-pressure nozzle, a normally closed air valve is arranged on the high-pressure air pipe, when the automobile is accelerated, the normally closed air valve on the high-pressure air pipe is opened except for normal air suction of the engine cylinder, so that high-pressure air in the high-pressure air storage tank is directly sprayed into the engine cylinder through the high-pressure nozzle, the supercharging control unit opens the normally closed air valve according to the acceleration signals obtained by the accelerator pedal sensor and the throttle opening sensor, the pressurization control unit is in communication connection with the vehicle-mounted electronic control unit, and controls the air compressor to inflate the high-pressure air storage tank according to signals of the pressure sensor.
However, although the prior art adopts a bypass method to increase the intake pressure, the supercharging effect is limited.
Disclosure of Invention
In view of the above prior art, the present invention provides an engine intake supercharging system capable of further increasing intake pressure and a control method thereof.
In order to solve the technical problem, the invention provides an engine air inlet pressurization system which comprises a control part, a non-pressurized air inlet part and a pressurized air inlet part, wherein the control part can be communicated with an engine management system, the pressurized air inlet part can be communicated with the non-pressurized air inlet part, the control part can control the communication or the interruption of the non-pressurized air inlet part and the pressurized air inlet part with a combustion cylinder, the pressurized air inlet part comprises a pressurized cylinder and an air storage tank, the pressurized cylinder can be driven by a crankshaft of an engine, an air inlet valve can be communicated with the non-pressurized air inlet part, a first exhaust valve can be communicated with the air storage tank, and a second exhaust valve can be communicated with the non-pressurized air inlet part.
Preferably, the engine further comprises a turbocharger comprising a turbine operable to be propelled by engine exhaust gas, a compressor operable to communicate with the non-charge air intake, and an intake cooler operable to communicate with the compressor, the intake cooler being operable to communicate with the combustion and charge cylinders.
The invention also provides a control method of the engine air inlet supercharging system, which comprises the following steps:
1) after the engine is started, the control part controls an intake valve and a first exhaust valve on the supercharging cylinder to be fully opened;
2) when the pressure in the gas storage tank reaches the maximum air inlet pressure required by the combustion cylinder, the control part controls the first exhaust valve on the supercharging cylinder to close and the second exhaust valve to open fully;
3) the control part judges whether the air inlet pressure required by the combustion cylinder is smaller than the air inlet pressure of the supercharging cylinder or not according to the engine rotating speed, the throttle opening and the position information of an accelerator pedal acquired by the engine management system; if yes, executing step 4); otherwise, executing step 5);
4) the control part controls the non-supercharged air inlet part to be communicated with the combustion cylinder, and simultaneously an engine management system controls the opening and opening time of an air inlet on the combustion cylinder so as to control the air inlet pressure;
5) the control part controls the communication time of the non-supercharged air inlet part and the air storage tank and the combustion cylinder, and simultaneously the engine management system controls the full-open time of an inlet valve on the combustion cylinder so as to control the air inlet pressure.
Preferably, the method for controlling the communication time between the non-supercharged air inlet part and the air storage tank and the combustion cylinder by the control part in the step 5) comprises the following steps: the control part controls the non-supercharged air inlet part to supply air to the combustion cylinder firstly, and the air storage tank supplies air to the combustion cylinder after the non-supercharged air inlet part reaches the air inlet time until the combustion cylinder reaches the required air inlet pressure.
Preferably, the method also comprises the following steps: the control part controls the booster cylinder to supplement air for the air storage tank according to the air supply quantity of the air storage tank until the pressure in the air storage tank reaches the maximum air inlet pressure required by the combustion cylinder.
Compared with the prior art, the invention has the beneficial effects that:
1. by arranging the supercharging cylinder which can be driven by the crankshaft of the engine, fresh air can be further compressed to provide intake air with required compression ratio for the combustion cylinder of the engine, and the energy consumption and cost of supercharging equipment can be reduced and the arrangement space of the supercharging equipment can be saved;
2. through set up an intake valve and two exhaust valves on the pressure boost cylinder, can open first exhaust valve for its tonifying qi when the gas holder gas storage volume is not enough like this and pass through the exhaust of second exhaust valve when the gas holder internal pressure reaches the maximum admission pressure of combustion cylinder so that the energy consumption of pressure boost cylinder is zero.
Drawings
Fig. 1 is a schematic structural diagram of an engine intake supercharging system according to the present invention.
Illustration of the drawings: 1-combustion cylinder, 2-air storage tank, 3-supercharging cylinder, 4-waste gas exhaust pipeline, 5-air inlet, 6-compressor, 7-turbine, 8-air inlet cooler, 9-first air inlet pipeline, 10-second air inlet pipeline, 11-air inlet valve, 12-first exhaust valve, 13-second exhaust valve and 14-one-way valve.
Detailed Description
The invention will be further described with reference to the drawings and preferred embodiments.
Fig. 1 is a schematic structural diagram of an engine intake supercharging system according to the present invention, which includes a control portion (not shown), a non-charge air intake portion (not shown), and a charge air intake portion (not shown).
The control part can be communicated with an engine management system, namely the engine management system can calculate the required air inlet pressure of the combustion cylinder 1 according to the acquired engine rotating speed, the throttle opening and the position information of an accelerator pedal, and sends an instruction to the control part, and the control part controls the communication or the interruption of the non-supercharged air inlet part and the supercharged air inlet part with the combustion cylinder 1.
The above-mentioned non-supercharged air intake section may be provided as a fresh air intake system including an intake duct, an air cleaner, etc., which may communicate with an intake valve on the combustion cylinder 1 through a first intake duct 9; meanwhile, a check valve 14 is arranged on the first air inlet pipe 9, and the check valve 14 can be controlled by the control part, so that the communication time of the fresh air inlet system and the combustion cylinder 1 can be controlled, namely the air inlet quantity of the combustion cylinder 1 can be controlled.
One end of the charge air intake may communicate with the non-charge air intake, and the other end may communicate with the combustion cylinder 1. Specifically, the supercharged air inlet part comprises a supercharged cylinder 3 and an air storage tank 2, wherein the top of the supercharged cylinder 3 is provided with an inlet valve 11, a first exhaust valve 12 and a second exhaust valve 13, the inlet valve 11 of the supercharged cylinder 3 can be communicated with a first inlet pipeline 9 through a second inlet pipeline 10, the first exhaust valve 12 of the supercharged cylinder 3 can be communicated with the air storage tank 2, the air storage tank 2 can be communicated with an inlet valve on the combustion cylinder 1, and the second exhaust valve 13 of the supercharged cylinder 3 can also be communicated with the first inlet pipeline 9; meanwhile, control valves (not shown in the figure) are arranged at the inlet valve 11, the first exhaust valve 12 and the second exhaust valve 13 of the supercharging cylinder 3 and between the air storage tank 2 and the combustion cylinder 1, and can be controlled to be opened or closed by a control part according to instructions sent by an engine management system; furthermore, the piston of the boost cylinder 3 can be driven by the engine crankshaft, so that the fresh air introduced into the air storage tank 2 can be compressed and pressurized by coordinating the opening and closing of the inlet valve 11, the first exhaust valve 12 and the second exhaust valve 13 of the boost cylinder 3 until the pressure in the air storage tank 2 reaches the maximum inlet pressure required by the combustion cylinder 1.
Further, the volume of the supercharge cylinder 3 and the volume of the air tank 2 may be set according to the maximum intake pressure required to reach the combustion cylinders 1 and the number of the combustion cylinders 1. For example, in a 4-cylinder engine, the maximum intake pressure required for the combustion cylinder 1 is designed to be 2 times the intake pressure provided by the fresh air intake system, and at this time, the volume of the supercharge cylinder 3 can be set to be the sum of the volumes of the 4 combustion cylinders 1, and the volume of the air storage tank 2 is 4 times the volume of the supercharge cylinder 3.
Furthermore, in order to fully utilize the energy of the exhaust gas discharged from the combustion cylinder 1 and further increase the intake pressure, the present embodiment further includes a turbo-charging portion, which includes a turbine 7, a compressor 6 and an intake cooler 8, wherein the turbine 7 can be pushed by the exhaust gas of the engine discharged from the exhaust gas exhaust pipe 4, the air inlet 5 of the compressor 6 can be communicated with the fresh air intake system and can compress the fresh air, the air inlet of the intake cooler 8 can be communicated with the compressor 6 and can cool the compressed and supercharged fresh air, and the air outlet of the intake cooler 8 can be communicated with the combustion cylinder 1 and the supercharged cylinder 3 through the first intake pipe 9 and the second intake pipe 10, respectively.
The invention also provides a control method of the engine air inlet supercharging system, which comprises the following steps:
1) after the engine is started, the control part controls the intake valve and the first exhaust valve on the supercharging cylinder to be fully opened so that fresh air enters the air storage tank, and meanwhile, the fresh air in the air storage tank is compressed through the supercharging cylinder to increase pressure.
2) When the pressure in the gas storage tank reaches the maximum intake pressure required by the combustion cylinder, the control part controls the first exhaust valve on the booster cylinder to close and the second exhaust valve on the booster cylinder to open, so that the exhaust pressure of the second exhaust valve is the intake pressure of the intake valve, namely the booster cylinder does not work and does not consume energy.
3) The control part judges whether the air inlet pressure required by the combustion cylinder is smaller than the air inlet pressure of the supercharging cylinder or not according to the engine rotating speed, the throttle opening and the position information of an accelerator pedal acquired by the engine management system; if yes, executing step 4); otherwise, step 5) is executed.
4) The control part controls the fresh air intake system to be communicated with the combustion cylinder, and the fresh air intake system directly provides fresh air for the combustion cylinder even if the one-way valve on the first air intake pipeline is fully opened; meanwhile, the opening degree and the opening time of the intake valve on the combustion cylinder are controlled by the engine management system to control the intake pressure (i.e., the intake air amount).
5) The control part controls the communication time of the fresh air intake system and the air storage tank and the combustion cylinder, namely the control part controls the fresh air intake system to directly provide fresh air for the combustion cylinder, and after the air supply of the fresh air intake system reaches the preset air intake time, the air storage tank provides pressurized fresh air for the combustion cylinder until the required air intake pressure in the combustion cylinder is reached; meanwhile, the engine management system controls the full opening time of an intake valve on the combustion cylinder so as to control the intake pressure and the intake compression ratio.
6) The control part controls the booster cylinder to supplement air for the air storage tank in time according to the air supply quantity of the air storage tank until the pressure in the air storage tank reaches the maximum air inlet pressure required by the combustion cylinder.
The invention can open the channel directly supplied by the fresh air intake system or the channel directly supplied by the fresh air intake system and then supplied by the pressurized air intake part according to the requirement, and can control the fresh air intake time and the intake pressure according to the requirement; meanwhile, through setting up the pressurized air intake part including pressurized cylinder and gas holder to make pressurized cylinder by engine crankshaft drive and set up the air intake valve, first exhaust valve and the second exhaust valve that can be controlled its switching by the control division on pressurized cylinder, so not only can control the compression ratio of fresh air as required, and finally control the pressure of admitting air in the combustion cylinder, but also can reduce supercharging equipment energy consumption and cost and save supercharging equipment arrangement space.
The foregoing merely represents preferred embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (5)

1. An engine intake boosting system comprising a control portion communicable with an engine management system, a non-charge air intake portion, and a charge air intake portion communicable with the non-charge air intake portion, the control portion being operable to control the non-charge air intake portion and the charge air intake portion to communicate with or interrupt a combustion cylinder, characterized in that: the supercharged air inlet part comprises a supercharged air cylinder driven by an engine crankshaft and an air storage tank communicated with the combustion air cylinder, and the supercharged air cylinder is provided with an inlet valve communicated with the non-supercharged air inlet part, a first exhaust valve communicated with the air storage tank and a second exhaust valve communicated with the non-supercharged air inlet part.
2. An engine intake boosting system according to claim 1, wherein: also included is a turbocharger including a turbine that may be propelled by engine exhaust gas, a compressor that may be in communication with the non-charge air intake, and an intake cooler that may be in communication with the compressor, the intake cooler may be in communication with the combustion cylinder and the boost cylinder.
3. A control method of an engine intake air supercharging system according to claim 1, characterized by comprising the steps of:
1) after the engine is started, the control part controls an intake valve and a first exhaust valve on the supercharging cylinder to be fully opened;
2) when the pressure in the gas storage tank reaches the maximum air inlet pressure required by the combustion cylinder, the control part controls the first exhaust valve on the supercharging cylinder to close and the second exhaust valve to open fully;
3) the control part judges whether the air inlet pressure required by the combustion cylinder is smaller than the air inlet pressure of the supercharging cylinder or not according to the engine rotating speed, the throttle opening and the position information of an accelerator pedal acquired by the engine management system; if yes, executing step 4); otherwise, executing step 5);
4) the control part controls the non-supercharged air inlet part to be communicated with the combustion cylinder, and simultaneously an engine management system controls the opening and opening time of an air inlet on the combustion cylinder so as to control the air inlet pressure;
5) the control part controls the communication time of the non-supercharged air inlet part and the air storage tank and the combustion cylinder, and simultaneously the engine management system controls the full-open time of an inlet valve on the combustion cylinder so as to control the air inlet pressure.
4. The method for controlling the intake air supercharging system of the engine as claimed in claim 3, wherein the method for the control portion to control the communication time of the non-supercharged air intake portion and the air storage tank with the combustion cylinder in step 5) comprises: the control part controls the non-supercharged air inlet part to supply air to the combustion cylinder firstly, and the air storage tank supplies air to the combustion cylinder after the non-supercharged air inlet part reaches the air inlet time until the combustion cylinder reaches the required air inlet pressure.
5. The engine intake air supercharging system control method according to claim 3 or 4, characterized by further comprising the steps of: the control part controls the booster cylinder to supplement air for the air storage tank according to the air supply quantity of the air storage tank until the pressure in the air storage tank reaches the maximum air inlet pressure required by the combustion cylinder.
CN202010502255.3A 2020-06-04 2020-06-04 Engine air inlet supercharging system and control method thereof Pending CN111550306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010502255.3A CN111550306A (en) 2020-06-04 2020-06-04 Engine air inlet supercharging system and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010502255.3A CN111550306A (en) 2020-06-04 2020-06-04 Engine air inlet supercharging system and control method thereof

Publications (1)

Publication Number Publication Date
CN111550306A true CN111550306A (en) 2020-08-18

Family

ID=71999776

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010502255.3A Pending CN111550306A (en) 2020-06-04 2020-06-04 Engine air inlet supercharging system and control method thereof

Country Status (1)

Country Link
CN (1) CN111550306A (en)

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