CN116447167A - Intake air compensation method and turbocharging control device with intake air compensation structure - Google Patents

Intake air compensation method and turbocharging control device with intake air compensation structure Download PDF

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Publication number
CN116447167A
CN116447167A CN202310653481.5A CN202310653481A CN116447167A CN 116447167 A CN116447167 A CN 116447167A CN 202310653481 A CN202310653481 A CN 202310653481A CN 116447167 A CN116447167 A CN 116447167A
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CN
China
Prior art keywords
air
compressor
compensation
intake
inlet
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CN202310653481.5A
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Chinese (zh)
Inventor
于萌
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Individual
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Individual
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Priority to CN202310653481.5A priority Critical patent/CN116447167A/en
Publication of CN116447167A publication Critical patent/CN116447167A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • 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 discloses an air intake compensation method and a turbocharging control device with an air intake compensation structure. The air inlet compensation method is more active and direct. In addition, compared with the prior art, the air intake compensation method provided by the invention has the advantages that the compensation air is fed into the air compressor above the air compressor impeller along the rotation direction of the air compressor impeller, and the compensation air cannot be directly injected against the blades of the air compressor impeller. The compressed air pushes the air compressing impeller of the air compressor to carry out supercharging, and can take away a part of heat, enter the engine to participate in combustion, so that the oxygen content in the air cylinder is increased, the thermal efficiency of the engine is further improved, and the supercharging is realized and the air inflow of the engine is compensated.

Description

Intake air compensation method and turbocharging control device with intake air compensation structure
Technical Field
The invention relates to an intake air compensation method and a turbocharger control device with an intake air compensation structure.
Background
The working principle of the turbocharger is that the exhaust gas generated by the engine works, the turbine is pushed to rotate and drive the internal pressure air impeller of the coaxial compressor to rotate, the air filtered by the air filter is pressurized and sent into the air inlet pipe of the engine, and the air enters the cylinder to work. The delay time of the supercharger is 1-2 seconds, and the delay time of the supercharger is longer due to complex working conditions and severe environments of trucks.
Due to turbo lag, insufficient air inflow, insufficient fuel combustion, increased carbon deposition in an engine cylinder, poor fuel economy, increased transportation cost, direct discharge of incompletely combusted fuel from an exhaust pipe, and environmental pollution.
Today, turbocharger technology, including twin turbochargers, small inertia turbines, variable section turbines, etc., has grown considerably, all in great effort to reduce turbo lag. But is limited by the working principle, the low speed, the medium speed and the high speed cannot be simultaneously satisfied, only the turbo hysteresis phenomenon can be relieved, and the turbo hysteresis phenomenon cannot completely disappear.
In order to solve the above problems, the chinese patent with application number 201710668633 discloses a turbocharger with an air intake compensation device, which comprises a compressor housing and a compressor impeller, wherein a compressor housing insert is arranged inside the compressor housing, the compressor housing insert and the compressor housing form an air supplementing cavity, an air supplementing hole is surrounded on the inner wall of the compressor housing insert, the air intake and supplementing cavity is communicated with the compressor impeller through the air supplementing hole, the direction of the air supplementing hole is the same as the rotation direction of the compressor impeller, an air supplementing flange is arranged on the outer wall of the compressor housing, and the air supplementing flange is connected with the air intake and supplementing cavity and an external high-pressure air source.
The device also increases the back pressure of the compressor impeller of the compressor while supplementing air to the air inlet pipe of the engine, and the rotation resistance of the impeller is increased. This drag acts on the turbine through the coupling between the compressor wheel and the turbine, requiring the use of more engine exhaust to overcome the drag, resulting in increased engine load and power loss. Meanwhile, the time point, the time length and the air supplementing amount of the air inlet and the air supplementing of the engine are difficult to control.
In addition, in the prior art, high-pressure air generated by an inflating pump is stored in the air storage cylinder, the throttle controls the on-off operation of an air outlet pipeline of the air storage cylinder so as to control the air in the air storage cylinder to be input into a turbine working cavity of the supercharger, and the compressed air pushes the turbine to work. In this technique, the engine drives the inflating pump to do additional work to ensure a sufficient air source. However, the length of time that the compressed air acts on the turbine is difficult to control, and the length of time that the compressed air acts on the turbine is difficult to control during constant speed running or acceleration, thereby increasing the work load of the engine.
Disclosure of Invention
The present invention provides an intake compensation method and a turbocharger control device with an intake compensation structure, so as to overcome the above-mentioned disadvantages of the prior art.
The invention provides an intake compensation method, which comprises the following steps:
step 100, detecting air inlet pressure, and executing step 200 when the air inlet pressure meets the safe driving air pressure;
step 200, after detecting that the accelerator action starts the vehicle, switching on a gas path between a gas source and the gas inlet of the gas compressor for compensating the gas inlet, performing gas inlet compensation on the gas compressor, and after reaching a first set time, closing the gas path to stop gas inlet compensation;
and 300, when the accelerator action is detected to be accelerated so as to change the vehicle from uniform speed running to acceleration running, switching on the gas path, carrying out air intake compensation on the air compressor, and closing the gas path after reaching a second set time, and stopping air intake compensation.
The air inlet compensation of the air compressor comprises the following steps:
and after the compensation air enters an annular cavity formed on the side wall of the compressor shell, the compensation air is sprayed out through a nozzle which is arranged on the inner side wall of the air inlet of the compressor, communicated with the annular cavity and positioned above the compressor impeller in the same direction as the rotation direction of the compressor impeller.
Preferably: the air source comprises an air pump, an air storage tank, a hose for communicating the air pump and the air storage tank, and a valve arranged between the air pump and the air storage tank;
the method further comprises the steps of:
and when the air pressure in the air storage tank is detected to be lower than the air pressure set value, closing the air passage, and stopping air inlet compensation.
The invention also provides a turbocharging control device with an air inlet compensation structure, which comprises: the device comprises a gas compressor, a compensation gas inlet, an annular cavity, a compensation gas outlet, a gas source and a control module;
the compressor comprises a compressor shell and a compressor impeller arranged in the compressor shell;
the annular cavity is a cavity formed in the annular air inlet side wall of the compressor housing;
the compensation air inlet is arranged on the outer side wall of the compressor shell and is communicated with the annular cavity;
the position of the compensation air outlet on the inner side wall is lower than the plane of the air inlet of the air compressor shell and higher than the plane of the highest point of the air compressor impeller, and the opening direction of the compensation air outlet enables the air flow direction sprayed out of the compensation air outlet to be the same as the rotation direction of the air compressor impeller;
the control module comprises an accelerator detection unit, a first air pressure detection unit, a second air pressure detection unit and a control unit;
the control unit is electrically connected with the throttle detection unit, the first air pressure detection unit and the second air pressure detection unit, and is used for switching on an air path between an air source and the air compressor for compensating air intake after detecting that the throttle action enables the vehicle to start when the air intake air pressure meets the safe driving air pressure, enabling the compensating air intake to enter an annular cavity formed on the side wall of the air compressor shell, and stopping air intake compensation after the compensating air intake enters the annular cavity formed on the side wall of the air compressor shell and is communicated with the annular cavity in the same direction as the rotating direction of the impeller of the air compressor through the compensating air outlet which is arranged on the inner side wall of the air inlet of the air compressor and is positioned above the impeller of the air compressor, carrying out air intake compensation on the air compressor, and closing the air path after reaching a first set time; when the acceleration of the vehicle is detected, the air channel is switched on to compensate the air inlet of the air compressor, and the air channel is closed after the second set time is reached, so that the compensation is stopped.
Preferably: the compensating air inlet is of a flange structure protruding out of the outer side wall.
Preferably: and an included angle is formed between the long axis of the compensation air outlet and the plane where the air compressing impeller is located.
Preferably: the air source comprises an air pump, an air storage tank, a hose for communicating the air pump and the air storage tank, and a valve arranged between the air pump and the air storage tank;
and the control unit is also used for closing the air passage and stopping air intake compensation when the air pressure in the air storage tank is detected to be lower than the air pressure set value.
Preferably: the throttle detection unit is a boost switch arranged at the throttle pedal of the vehicle; the first air pressure detection unit is arranged at the air inlet, and the second air pressure detection unit is arranged in the air storage tank; the first air pressure detection unit and the second air pressure detection unit are air pressure sensors.
Preferably: the compressor shell and the turbine shell are integrally formed, or the compressor shell and the turbine shell are of a split structure.
Preferably: it is characterized in that the method comprises the steps of,
the number of the compensation air outlets is 3;
the air compressing impeller is opposite to the air inlet of the air compressor shell;
the annular cavity is integrally formed with the compressor housing.
The invention has the beneficial effects that: according to the invention, the air inlet compensation is carried out on the air compressor by directly responding to the accelerator action, namely, the air inlet is directly compensated into the air compressor after the accelerator acceleration action is detected, so that the delay caused by that the turbine is driven by the waste gas to push the turbine after the waste gas is discharged by the engine in the prior art and then the turbine drives the air compressor impeller to boost can be eliminated. Compared with the prior art, the air inlet compensation method is more active and direct, and the delay of waiting for the exhaust gas to drive the turbine is eliminated. In addition, compared with the prior art, the air intake compensation method provided by the invention has the advantages that the compensation air is fed into the air compressor above the air compressor impeller along the rotation direction of the air compressor impeller, and the compensation air cannot be directly injected against the blades of the air compressor impeller.
Compressed air is sprayed out from a nozzle which is arranged on the inner side wall of the air inlet of the air compressor, communicated with the annular cavity and positioned above the air compressor impeller in the same direction as the rotation direction of the air compressor impeller, so that the back pressure of the air compressor impeller of the air compressor is reduced, the rotation resistance of the impeller is further reduced, the air compression efficiency is improved, the load of an engine is further reduced, and the power loss is reduced.
In addition, the compressed air sprayed out of the nozzle can push the air compressor impeller of the air compressor to carry out supercharging, can take away a part of heat, can enter the engine to participate in combustion, increases the oxygen content in the cylinder, further can improve the thermal efficiency of the engine, and not only realizes supercharging, but also compensates the air inflow of the engine.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a front view of a compressor of the turbocharger control device according to the present invention.
Fig. 3 is a top view of the compressor of fig. 2.
Fig. 4 is a cross-sectional view of the compressor shown in fig. 2.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The embodiment of the invention provides an air inlet compensation method, as shown in fig. 1, which comprises the following steps:
step 100, detecting the air inlet pressure, and executing step 200 when the air inlet pressure meets the safe driving air pressure.
Step 200, after the throttle action is detected to start the vehicle, a gas path for compensating the gas inlet between a gas source and the gas inlet of the gas compressor is connected, so that the compensating gas inlet enters an annular cavity formed on the side wall of the gas compressor shell, and is sprayed out through a nozzle which is arranged on the inner side wall of the gas inlet of the gas compressor, is communicated with the annular cavity and is positioned above the gas compressor impeller in the same direction as the rotation direction of the gas compressor impeller, the gas inlet compensation is carried out on the gas compressor, and after the first set time is reached, the gas path is closed, and the gas inlet compensation is stopped.
In some embodiments, the air source may be an air intake source of a vehicle engine.
In other embodiments, the air source includes an air pump, an air reservoir, a hose that communicates the air pump with the air reservoir, and a valve disposed between the air pump and the air reservoir.
In the case where the gas source comprises a gas reservoir, the method further comprises:
and when the air pressure in the air storage tank is detected to be lower than the air pressure set value, closing the air passage, and stopping air inlet compensation.
In some embodiments, the first setting time may be set according to an actual condition, for example, the first setting time may be set longer in a mountain road condition than in a flat road condition that is easy to accelerate.
Step 300, when it is detected that the accelerator is used as acceleration to change the vehicle from uniform speed running to acceleration running, the air path is turned on, air intake compensation is performed on the air compressor, the specific compensation mode can be seen in step 200, and after reaching the second set time, the air path is turned off, and compensation is stopped.
In some embodiments, the second setting time may be set according to an actual working condition, and the specific manner may refer to the setting of the first setting time.
According to the air intake compensation method, the air compressor is subjected to air intake compensation by directly responding to the accelerator action, namely, air intake is compensated to the air compressor directly after the accelerator acceleration action is detected, so that delay caused by the fact that exhaust gas pushes the turbine after the engine discharges the exhaust gas and then the turbine drives the air compressor impeller to boost in the prior art can be eliminated. Compared with the prior art, the air inlet compensation method is more active and direct, and the delay of waiting for the exhaust gas to drive the turbine is eliminated. In addition, compared with the prior art, the air intake compensation method provided by the invention has the advantages that the compensation air is fed into the air compressor above the air compressor impeller along the rotation direction of the air compressor impeller, and the compensation air cannot be directly injected against the blades of the air compressor impeller.
Compressed air is sprayed out from a nozzle which is arranged on the inner side wall of the air inlet of the air compressor, communicated with the annular cavity and positioned above the air compressor impeller in the same direction as the rotation direction of the air compressor impeller, so that the back pressure of the air compressor impeller of the air compressor is reduced, the rotation resistance of the impeller is further reduced, the air compression efficiency is improved, the load of an engine is further reduced, and the power loss is reduced.
In addition, the compressed air sprayed out of the nozzle can push the air compressor impeller of the air compressor to carry out supercharging, can take away a part of heat, can enter the engine to participate in combustion, increases the oxygen content in the cylinder, can further improve the thermal efficiency of the engine, and not only realizes supercharging, but also compensates the air inflow of the engine.
The invention also provides a turbocharging control device with the air inlet compensation structure. As shown in fig. 2 to 4, the turbo boost control apparatus includes: the device comprises a compressor, a compensation air inlet 3, an annular cavity 4, a compensation air outlet 5, an air source (not shown) and a control module (not shown).
The compressor comprises a compressor housing 1 and a compressor impeller 2 arranged in the compressor housing 1. The air compressing impeller 2 is opposite to the air inlet of the air compressor shell 1.
The annular chamber 4 is a hollow body formed in the annular inlet sidewall of the compressor housing 1. Preferably, the annular chamber 4 is integrally formed with the compressor housing 1.
The compensation air inlet 3 is arranged on the outer side wall of the compressor housing 1 and is communicated with the annular cavity 4.
In some embodiments, the compensating air inlet 3 is a flange structure protruding from the outer side wall, and is adapted to be connected to a high-pressure hose.
The compensation air outlet 5 is arranged on the inner side wall of the compressor housing 1 and is communicated with the annular cavity 4.
In some embodiments, a plurality of the offset air outlets 5 may be provided on the inner sidewall. Preferably, the number of the compensation air outlets 5 is 3.
In some embodiments, the position of the compensating air outlet 5 on the inner side wall is lower than the plane of the air inlet of the air compressor housing 1 and higher than the plane of the highest point of the air compressor impeller 2, and the opening direction of the compensating air outlet 5 makes the air flow direction ejected by the compensating air outlet 5 be the same as the rotation direction of the air compressor impeller 2.
In some embodiments, the long axis of the compensation air outlet 5 forms an included angle with the plane of the air compressing impeller 2.
In some embodiments, the air source may be an air intake of an engine with an air filter element.
In other embodiments, the air source includes an air pump, an air reservoir, a hose that communicates the air pump with the air reservoir, and a valve disposed between the air pump and the air reservoir.
The control module comprises an accelerator detection unit, a first air pressure detection unit, a second air pressure detection unit and a control unit.
The control unit is electrically connected with the throttle detection unit and the first and second air pressure detection units, and is used for switching on an air path between an air source and the air compressor for compensating air intake after detecting that the throttle action starts the vehicle when the air intake air pressure meets the safe driving air pressure, enabling the compensated air intake to enter an annular cavity 4 formed on the side wall of the air compressor shell 1, spraying out the compensated air through a compensation air outlet 5 which is arranged on the inner side wall of the air inlet of the air compressor, is communicated with the annular cavity 4 and is positioned above the air compressor impeller 2 in the same direction as the rotation direction of the air compressor impeller 2, performing air intake compensation on the air compressor, and closing the air path after reaching a first set time, and stopping air intake compensation; when the air pressure in the air storage tank is detected to be lower than the air pressure set value, closing the air passage, and stopping air inlet compensation; when the acceleration of the vehicle is detected, the air channel is switched on to compensate the air inlet of the air compressor, and the air channel is closed after the second set time is reached, so that the compensation is stopped.
In some embodiments, the throttle detection unit may be a boost switch provided at a vehicle throttle pedal. The first air pressure detection unit is arranged at the air inlet, and the second air pressure detection unit is arranged in the air storage tank. The first and second air pressure detecting units may be air pressure sensors.
In some embodiments, the compressor housing 1 of the present invention may be integrally formed with the turbine housing.
Furthermore, in some embodiments, the compressor housing 1 and the turbine housing of the present invention are in a split structure, and the connection manner thereof may be any common means, such as nesting, riveting, welding, etc.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (10)

1. An intake air compensation method, comprising:
step 100, detecting air inlet pressure, and executing step 200 when the air inlet pressure meets the safe driving air pressure;
step 200, after detecting that the accelerator action starts the vehicle, switching on a gas path between a gas source and the gas inlet of the gas compressor for compensating the gas inlet, performing gas inlet compensation on the gas compressor, and after reaching a first set time, closing the gas path to stop gas inlet compensation;
and 300, when the accelerator action is detected to be accelerated so as to change the vehicle from uniform speed running to acceleration running, switching on the gas path, carrying out air intake compensation on the air compressor, and closing the gas path after reaching a second set time, and stopping air intake compensation.
2. The intake compensation method of claim 1, wherein the intake compensating the compressor comprises:
and after the compensation air enters an annular cavity formed on the side wall of the compressor shell, the compensation air is sprayed out through a nozzle which is arranged on the inner side wall of the air inlet of the compressor, communicated with the annular cavity and positioned above the compressor impeller in the same direction as the rotation direction of the compressor impeller.
3. The intake air compensation method according to claim 1 or 2, wherein the air source includes an air pump, an air tank, a hose that communicates the air pump and the air tank, and a valve provided between the air pump and the air tank;
the method further comprises the steps of:
and when the air pressure in the air storage tank is detected to be lower than the air pressure set value, closing the air passage, and stopping air inlet compensation.
4. A turbocharger control device with an intake air compensation structure, comprising: the device comprises a gas compressor, a compensation gas inlet, an annular cavity, a compensation gas outlet, a gas source and a control module;
the compressor comprises a compressor shell and a compressor impeller arranged in the compressor shell;
the annular cavity is a cavity formed in the annular air inlet side wall of the compressor housing;
the compensation air inlet is arranged on the outer side wall of the compressor shell and is communicated with the annular cavity;
the position of the compensation air outlet on the inner side wall is lower than the plane of the air inlet of the air compressor shell and higher than the plane of the highest point of the air compressor impeller, and the opening direction of the compensation air outlet enables the air flow direction sprayed out of the compensation air outlet to be the same as the rotation direction of the air compressor impeller;
the control module comprises an accelerator detection unit, a first air pressure detection unit, a second air pressure detection unit and a control unit;
the control unit is electrically connected with the throttle detection unit, the first air pressure detection unit and the second air pressure detection unit, and is used for switching on an air path between an air source and the air compressor for compensating air intake after detecting that the throttle action starts the vehicle when the air intake air pressure meets the safe driving air pressure, and stopping air intake compensation after the air intake enters an annular cavity formed on the side wall of the air compressor shell and is in the same direction as the rotating direction of the air compressor impeller through a compensation air outlet which is arranged on the inner side wall of the air compressor air inlet, is communicated with the annular cavity and is positioned above the air compressor impeller, and is used for carrying out air intake compensation on the air compressor; when the acceleration of the vehicle is detected, the air channel is switched on to compensate the air inlet of the air compressor, and the air channel is closed after the second set time is reached, so that the compensation is stopped.
5. The turbocharger control device according to claim 4, wherein the compensating intake port is a flange structure protruding from the outer sidewall.
6. The turbocharger control device of claim 4, wherein the long axis of the offset outlet forms an angle with the plane of the compressor wheel.
7. The turbocharging control device according to claim 4, wherein the air source comprises an air pump, an air tank, a hose that communicates the air pump and the air tank, and a valve provided between the air pump and the air tank;
and the control unit is also used for closing the air passage and stopping air intake compensation when the air pressure in the air storage tank is detected to be lower than the air pressure set value.
8. The turbocharging control device according to claim 7, wherein the throttle detecting unit is a supercharging switch provided at a vehicle throttle pedal; the first air pressure detection unit is arranged at the air inlet, and the second air pressure detection unit is arranged in the air storage tank; the first air pressure detection unit and the second air pressure detection unit are air pressure sensors.
9. The turbocharging control device according to claim 4, wherein the compressor housing is integrally formed with the turbine housing, or the compressor housing and the turbine housing are of a split structure.
10. The turbocharging control device according to any one of claims 4 to 9, characterized in that,
the number of the compensation air outlets is 3;
the air compressing impeller is opposite to the air inlet of the air compressor shell;
the annular cavity is integrally formed with the compressor housing.
CN202310653481.5A 2023-06-05 2023-06-05 Intake air compensation method and turbocharging control device with intake air compensation structure Pending CN116447167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310653481.5A CN116447167A (en) 2023-06-05 2023-06-05 Intake air compensation method and turbocharging control device with intake air compensation structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310653481.5A CN116447167A (en) 2023-06-05 2023-06-05 Intake air compensation method and turbocharging control device with intake air compensation structure

Publications (1)

Publication Number Publication Date
CN116447167A true CN116447167A (en) 2023-07-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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