CN107829835A - Turbocharging engine booster pressure limit control method - Google Patents
Turbocharging engine booster pressure limit control method Download PDFInfo
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- CN107829835A CN107829835A CN201711022277.4A CN201711022277A CN107829835A CN 107829835 A CN107829835 A CN 107829835A CN 201711022277 A CN201711022277 A CN 201711022277A CN 107829835 A CN107829835 A CN 107829835A
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- Prior art keywords
- pressure
- boost
- booster
- limit value
- engine
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
Abstract
Present invention is disclosed a kind of turbocharging engine booster pressure limit control method, turbocharging engine booster pressure limit includes maximum pressure boost limit value and minimum boost pressure limit value；The maximum pressure boost limit value：The maximum pressure boost limit value obtained by engine torque, or the maximum pressure boost limit value determined by booster characteristic, both take the maximum pressure boost limit value of small as booster；The minimum boost pressure limit value is the pressure value after air filter pressure drop.Control method of the present invention adds the signal for calculating virtual turbine sensor, in each signal of guarantee all in the case of safe range, can increase pressure ratio to greatest extent according to secondary speed signal, excavate the power performance of booster.
Description
Technical field
The present invention relates to field of automobile electronic control, and in particular to one kind calculates turbocharging engine booster pressure limit
Method.
Background technology
Passenger car gasoline supercharger at present, widely used supercharging mode are turbocharging.In order to reduce rotary inertia, carry
The response of high boost presence, generally to miniaturization.In small-sized booster type selecting, in order to prevent the surge of booster,
Obstruction etc., the pressure ratio of booster must be in rational scope.Therefore in the design of control strategy, it should be taken into account maximum boost
The limit value of pressure.
And in practical application, in order to which booster must be protected to greatest extent, the phenomenon of overprotection often occurs.Make supercharging
Device can not give play to the boost pressure of maximum, reduce the performance of booster.Therefore a kind of effective boost pressure limit value is needed
Computational methods, booster can be protected, ensure its service life, and can plays larger boost performance.
The content of the invention
The technical problems to be solved by the invention are to realize a kind of performance that should play booster to greatest extent, are protected again
The control method of traffic safety is demonstrate,proved, temperature is too high after can preventing pressure, temperature over-range behind whirlpool, pinking, the failure such as surge.
To achieve these goals, the technical solution adopted by the present invention is：Turbocharging engine booster pressure limit control
Method processed, turbocharging engine booster pressure limit include maximum pressure boost limit value and minimum boost pressure limit value；
The maximum pressure boost limit value：The maximum pressure boost limit value obtained by engine torque, or by booster
The maximum pressure boost limit value that characteristic determines, both take the maximum pressure boost limit value of small as booster；
The minimum boost pressure limit value is the pressure value after air filter pressure drop.
The method of the maximum pressure boost limit value obtained by engine torque includes：
1-1) judge whether VVT has enabled failure, if faulty, the peak torque under VVT original states of tabling look-up to obtain, if
Fault-free, the then peak torque under VVT enabled states of tabling look-up to obtain；
1-2) by tabling look-up obtained peak torque, divided by angle of ignition efficiency and Lambda efficiency, obtain optimal external characteristics and turn round
Square；
1-3) table look-up to obtain peak load by optimal external characteristics moment of torsion and engine speed；
The maximum pressure boost obtained by engine torque 1-4) is drawn by peak load.
The 1-3) in, peak load determines according to electronic water pump fault state, if electronic water pump fault-free, required
Peak load is 1-3) in table look-up obtained peak load, if electronic water pump is faulty, required peak load is 1-3)
In the peak load tabling look-up to obtain be multiplied by correction factor, the correction factor is tabled look-up gained by engine speed.
The 1-4) in, air inflow is counter according to demand releases demand admission pressure, wherein pressure for turbocharging control system
Conversion coefficient and participate in exhaust gas pressure and tabled look-up acquisition by ECU, then pass through 1-3) in counter push away of peak load draw by engine torque
Obtained maximum pressure boost.
The method of the maximum pressure boost limit value determined by booster characteristic includes：
2-1) according to the booster type selecting stage, it is known that surge line, choke line supercharging pressure ratio, obtain most increasing for booster
Pressure pressure；
2-2) the secondary speed being calculated according to simulation secondary speed model, is tabled look-up to obtain booster with secondary speed
Maximum pressure boost；
2-3), by 2-1) and 2-2) in obtained two maximum pressure boosts take large values, i.e., to be obtained by booster characteristic
Maximum pressure boost.
Calculating the method for minimum boost pressure limit value includes：
3-1) confirm ambient pressure sensor whether failure, environmental pressure uses substitution value if faulty, if non-failure,
Environmental pressure is measurement value sensor；
3-2) tabled look-up by charge flow rate and obtain air filter voltage drop value；
The pressure value after air filter pressure drop is worth to air filter 3-3) is subtracted by ambient value；
3-4) pressure value after air filter is minimum boost pressure limit value.
A kind of automobile with worm gear supercharging engine, automobile include worm gear supercharging engine and turbocharging control system
System, the turbocharging control system use such as above-mentioned turbocharging engine booster pressure limit control method.
Control method of the present invention adds the signal for calculating virtual turbine sensor, can protected according to secondary speed signal
Each signal is demonstrate,proved all in the case of safe range, increases pressure ratio to greatest extent, excavates the power performance of booster.
Brief description of the drawings
The content of every width accompanying drawing expression in description of the invention is briefly described below：
Fig. 1 is according to engine test bench characteristic torque arithmetic maximum pressure boost schematic diagram；
Fig. 2 is according to turbocharger property calculation maximum pressure boost schematic diagram；
Fig. 3 is calculating maximum pressure boost limit value schematic diagram；
Fig. 4 is the minimum boost pressure limit value schematic diagram of calculating.
Embodiment
Control method of the present invention combines the operating mode of a variety of limitation boost pressures, and comprehensive give finally limits boost pressure
Calculating logic.The limit value for influenceing boost pressure has a lot：Including booster bulk properties, such as surge line, choke line, maximum (top) speed
Limit value；Including intake air temperature；Peak torque limit value；VVT functions etc..According to engine under each operating mode to demand boost pressure
Difference, effective maximum pressure boost limit value computational methods can be used, specific method is as follows：
Specifically, calculating turbocharging engine booster pressure limit includes two aspects, maximum pressure boost limit value with
Minimum boost pressure limit value, maximum pressure boost limit value also include two aspects, and a kind of most increased by what engine torque obtained
Pressure pressure limit value, another kind are the maximum pressure boost limit values determined by booster characteristic.Both take small as booster most
Big boost pressure limit value, minimum boost pressure limit value is the pressure value after air filter pressure drop.
1st, according to the method for engine test bench characteristic torque arithmetic maximum pressure boost：
First determine whether VVT has enabled failure.If faulty, that is, the peak torque under VVT original states of tabling look-up to obtain.If
Fault-free, that is, the peak torque under VVT enabled states of tabling look-up to obtain.Then by tabling look-up obtained peak torque, divided by angle of ignition effect
Rate and Lambda efficiency, obtain optimal external characteristics moment of torsion.Table look-up to obtain maximum by optimal external characteristics moment of torsion and engine speed again
Load.
Then electronic water pump failure is determined whether.If fault-free, required peak load is above-mentioned to table look-up what is obtained
Peak load.If faulty, required peak load is that the above-mentioned peak load for tabling look-up to obtain is multiplied by correction factor.Correction factor
By engine speed table look-up gained.
Because admission pressure and air inflow have linear relationship, therefore air inflow is anti-according to demand for turbocharging control system
Release demand admission pressure, wherein pressure conversion coefficient and participate in exhaust gas pressure and tabled look-up acquisition by ECU.I.e. by above-mentioned gained most
Big load counter can release the maximum pressure boost obtained by engine torque.
2nd, according to the method for turbocharger property calculation maximum pressure boost：
First according to the booster type selecting stage, it is known that surge line, choke line supercharging pressure ratio, obtain most increasing for booster
Pressure pressure.Then the secondary speed being calculated according to simulation secondary speed model, is tabled look-up to obtain booster with secondary speed
Maximum pressure boost.Due to can be wanted in practical stage, surge line with choke line pressure ratio than the pressure ratio that booster characteristic provides
It is small, therefore taken large values in above-mentioned two maximum pressure boost, i.e. the maximum pressure boost to be obtained by booster characteristic.
3rd, the method for calculating minimum boost pressure limit value：
Pressure value after minimum boost pressure limit value, as gas handling system air filter.Pressure value after air filter is ring
Border pressure value subtracts air filter voltage drop value.Air filter voltage drop value is tabled look-up acquisition by charge flow rate, during computing environment pressure, first confirms that ring
Border pressure sensor whether failure, if faulty environmental pressure uses substitution value；If non-failure, environmental pressure is that sensor is surveyed
Value.
Argument table in Fig. 1-4：
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing
Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.
Claims (7)
1. turbocharging engine booster pressure limit control method, it is characterised in that turbocharging engine booster pressure limit
Value includes maximum pressure boost limit value and minimum boost pressure limit value；
The maximum pressure boost limit value：The maximum pressure boost limit value obtained by engine torque, or by booster characteristic
The maximum pressure boost limit value of decision, both take the maximum pressure boost limit value of small as booster；
The minimum boost pressure limit value is the pressure value after air filter pressure drop.
2. turbocharging engine booster pressure limit control method according to claim 1, it is characterised in that：By starting
The method for the maximum pressure boost limit value that machine moment of torsion obtains includes：
1-1) judge whether VVT has enabled failure, if faulty, the peak torque under VVT original states of tabling look-up to obtain, if without reason
Barrier, the then peak torque under VVT enabled states of tabling look-up to obtain；
1-2) by tabling look-up obtained peak torque, divided by angle of ignition efficiency and Lambda efficiency, optimal external characteristics moment of torsion is obtained；
1-3) table look-up to obtain peak load by optimal external characteristics moment of torsion and engine speed；
The maximum pressure boost obtained by engine torque 1-4) is drawn by peak load.
3. turbocharging engine booster pressure limit control method according to claim 2, it is characterised in that：The 1-
3) in, peak load determines that if, electronic water pump fault-free, required peak load is 1- according to electronic water pump fault state
3) obtained peak load is tabled look-up in, if electronic water pump is faulty, required peak load is 1-3) in table look-up to obtain most
Big load is multiplied by correction factor, and the correction factor is tabled look-up gained by engine speed.
4. turbocharging engine booster pressure limit control method according to claim 3, it is characterised in that：The 1-
4) in, air inflow is counter according to demand releases demand admission pressure, wherein pressure conversion coefficient and participation for turbocharging control system
Exhaust gas pressure is tabled look-up acquisition by ECU, then passes through 1-3) in peak load is counter pushes away the maximum boost for drawing and being obtained by engine torque
Pressure.
5. the turbocharging engine booster pressure limit control method according to claim 1 or 4, it is characterised in that：By
The method for the maximum pressure boost limit value that booster characteristic determines includes：
2-1) according to the booster type selecting stage, it is known that surge line, choke line supercharging pressure ratio, obtain the maximum boost pressure of booster
Power；
2-2) the secondary speed being calculated according to simulation secondary speed model, is tabled look-up to obtain the maximum of booster with secondary speed
Boost pressure；
2-3), by 2-1) and 2-2) in obtained two maximum pressure boosts take large values, i.e., to be obtained most by booster characteristic
Big boost pressure.
6. turbocharging engine booster pressure limit control method according to claim 5, it is characterised in that：Calculate most
The method of small boost pressure limit value includes：
3-1) confirm ambient pressure sensor whether failure, environmental pressure uses substitution value if faulty, if non-failure, environment
Pressure is measurement value sensor；
3-2) tabled look-up by charge flow rate and obtain air filter voltage drop value；
The pressure value after air filter pressure drop is worth to air filter 3-3) is subtracted by ambient value；
3-4) pressure value after air filter is minimum boost pressure limit value.
7. a kind of automobile with worm gear supercharging engine, automobile includes worm gear supercharging engine and turbocharging control system,
It is characterized in that：The turbocharging control system uses the turbocharging engine booster pressure limit as described in claim 1-6
It is worth control method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711022277.4A CN107829835B (en) | 2017-10-27 | 2017-10-27 | Turbocharging engine supercharging pressure limiting value control method |
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| CN201711022277.4A CN107829835B (en) | 2017-10-27 | 2017-10-27 | Turbocharging engine supercharging pressure limiting value control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100058757A1 (en) * | 2006-12-21 | 2010-03-11 | Borgwarner Inc. | Regulating method for a turbocharger of an internal combustion engine, and turbocharger |
| CN102635451A (en) * | 2012-04-26 | 2012-08-15 | 潍柴动力股份有限公司 | Control method of protecting turbosuperchager |
| CN103485906A (en) * | 2012-06-12 | 2014-01-01 | 马涅蒂-马瑞利公司 | Method for controlling an internal combustion engine |
| CN105041489A (en) * | 2015-08-17 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Engine supercharge control method and device |
-
2017
- 2017-10-27 CN CN201711022277.4A patent/CN107829835B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100058757A1 (en) * | 2006-12-21 | 2010-03-11 | Borgwarner Inc. | Regulating method for a turbocharger of an internal combustion engine, and turbocharger |
| CN102635451A (en) * | 2012-04-26 | 2012-08-15 | 潍柴动力股份有限公司 | Control method of protecting turbosuperchager |
| CN103485906A (en) * | 2012-06-12 | 2014-01-01 | 马涅蒂-马瑞利公司 | Method for controlling an internal combustion engine |
| CN105041489A (en) * | 2015-08-17 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Engine supercharge control method and device |
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| CN107829835B (en) | 2020-01-10 |
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