CN110043374A - A kind of control method and system of engine exhaust back pressure - Google Patents
A kind of control method and system of engine exhaust back pressure Download PDFInfo
- Publication number
- CN110043374A CN110043374A CN201910460982.5A CN201910460982A CN110043374A CN 110043374 A CN110043374 A CN 110043374A CN 201910460982 A CN201910460982 A CN 201910460982A CN 110043374 A CN110043374 A CN 110043374A
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- Prior art keywords
- pressure
- back pressure
- valve
- exhaust back
- engine exhaust
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- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013028 emission testing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
- F02D2011/104—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles using electric step motors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention discloses a kind of control methods of engine exhaust back pressure, it is related to the technical field of exhaust back pressure control, it solves when carrying out engine performance measuring, needs to manually adjust valve to control exhaust back pressure, the technical problem low so as to cause working efficiency, stability is poor.The pressure value control Electric Actuator driving valve that this method is measured out of enmgine exhaust by pressure controller according to pressure sensor.The invention also discloses a kind of control systems of engine exhaust back pressure.The present invention realizes the automatic control to engine exhaust back pressure, and control is more accurate, the stability of its back pressure is more preferable, greatly improves working efficiency, and save manpower, financial resources.
Description
Technical field
The present invention relates to the technical fields of exhaust back pressure control, more specifically, it relates to a kind of engine exhaust back pressure
Control method and system.
Background technique
Under normal conditions, exhaust back pressure increase will lead to the decline of engine fuel efficiency of combustion, and economy is deteriorated, and move simultaneously
Power decline, discharge are also deteriorated.But in slow-speed of revolution power condition, if exhaust back pressure is very low, due to the unlatching in advance of exhaust valve, in work
Plug reaches before bottom dead center, and the still combustion gas with certain pressure just passes through excessively unobstructed exhaust valve and exhausts, and has lost a part
Function, torque want weak naturally, therefore torque when keeping certain exhaust back pressure that low speed can be improved when the slow-speed of revolution.Therefore, exist
When engine performance test and emission testing are done in laboratory, often need to consider magnitude of back pressure, and exhaust back pressure generally passes through adjusting
Valve is adjusted.
Currently, engine is in test-run a machine engine bench test, directly by engineering staff by manually adjusting valve to exhaust back pressure
It is controlled, working efficiency is low, is already unable to satisfy current automation, efficient production requirement；And use traditional behaviour
Make method, not only labor intensive, at high cost, stability is poor, also inaccurate to the performance test of engine.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, the purpose of the present invention one is to provide a kind of hair
The control method of motivation exhaust back pressure can carry out automatically controlling engine exhaust back pressure, and improve the steady of exhaust back pressure
It is qualitative.
The purpose of the present invention two is to provide a kind of control system of engine exhaust back pressure, realizes and carries on the back to engine exhaust
The automatic control of pressure, and improve the stability of exhaust back pressure.
To achieve the goals above one, the present invention provides a kind of control method of engine exhaust back pressure, pressure controls
The pressure value control Electric Actuator driving valve that instrument is measured out of enmgine exhaust according to pressure sensor.
It is improved further, acquires the pressure value in enmgine exhaust in real time by pressure sensor, press simultaneously
The pressure value of gas is converted into corresponding electric signal and is sent to the pressure controller by force snesor.
Further, the pressure controller presets multiple setting values, and this method is further comprising the steps of:
(1) electric signal described in is converted into corresponding reduced value by pressure controller；
(2) reduced value is compared with the setting value；
(3) pressure controller described in issues corresponding driving electric signal to Electric Actuator according to comparing result；
(4) Electric Actuator described in drives valve to be acted accordingly according to the driving electric signal.
To achieve the above object two, the present invention provides a kind of control systems of engine exhaust back pressure, including engine
Exhaust manifold, valve and escape pipe, the valve are mounted between enmgine exhaust and escape pipe, further include for controlling
Electric Actuator, pressure controller and the pressure sensor of valve processed, the Electric Actuator pass through pressure controller and pressure
Force snesor circuit connection, the pressure sensor are also connect with enmgine exhaust, the Electric Actuator and valve
Door connection.
It is improved further, further includes a conduction mechanism, the pressure sensor passes through conduction mechanism and engine
Exhaust manifold piping connection.
Further, the conduction mechanism includes heat radiation conduit and connecting conduit, and the pressure sensor passes through connection
Conduit and heat radiation conduit are connect with engine exhaust manifold road.
Further, the periphery of the heat radiation conduit is equipped with multiple cooling fins.
Further, the valve is a butterfly valve.
Further, the Electric Actuator is a stepper motor.
Beneficial effect
The present invention has the advantages that
1. being acquired in real time using pressure sensor to the pressure value in enmgine exhaust, while it is issued accordingly
Electric signal issue control electric signal to Electric Actuator control valve, thus real to pressure controller, and by pressure controller
Show the automatic control to engine exhaust back pressure, greatly improves the stability of working efficiency and exhaust back pressure.
2. pressure sensor is connect by conduction mechanism with engine exhaust manifold road, make pressure sensor and engine
Exhaust manifold has a certain distance, is on the one hand conducive to engineering staff and overhauls to the replacement of sensor, on the other hand also avoids
Because enmgine exhaust temperature is excessively high damage pressure sensor.And conduction mechanism is equipped with radiator, makes to be transported to
The gas temperature of pressure sensor is moderate, preferably to protect pressure sensor.
3. the valve being mounted between enmgine exhaust and escape pipe uses butterfly valve, it is conducive to Quick air-discharge, makes to start
Air pressure fast and stable in machine exhaust manifold is in setting state；And Electric Actuator uses stepper motor, can accurately control
The opening angle of valve makes it control precision higher.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein: 1- enmgine exhaust, 2- valve, 3- escape pipe, 4- Electric Actuator, 5- pressure controller, 6- pressure
Force snesor, 7- conduction mechanism, 71- connecting conduit, 72- heat radiation conduit, 8- cooling fin.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but does not constitute any limitation of the invention, any
The modification for the limited times that people is made in scope of the invention as claimed, still in scope of the presently claimed invention.
Refering to fig. 1, a kind of control method of engine exhaust back pressure, pressure controller is according to pressure sensor from engine
The pressure value control Electric Actuator driving valve measured in exhaust manifold.Engine exhaust is acquired in real time by pressure sensor
Pressure value in manifold, while the pressure value of gas is converted into corresponding electric signal and is sent to the pressure control by pressure sensor
Instrument processed.Pressure controller presets multiple setting values, and this method is further comprising the steps of:
(1) electric signal described in is converted into corresponding reduced value by pressure controller；
(2) reduced value is compared with setting value；
(3) pressure controller issues corresponding driving electric signal to Electric Actuator according to comparing result；
(4) Electric Actuator drives valve to be acted accordingly according to the driving electric signal.
When engine is tested, the size of engine oil supply will have a direct impact on air pressure in enmgine exhaust 1
Size, make its pressure transient.In order to stablize the pressure in enmgine exhaust, in this example, pressure controller is pre-
If there are six setting value, corresponding six pressure values of this six setting values.Pressure controller is by the electric signal from pressure sensor
It is compared after being converted into corresponding reduced value with setting value, so that it is determined that current setting value；Pressure controller is according to determination
Setting value issue corresponding control electric signal to Electric Actuator and drive valve.The state of this corresponding valve of six setting values
It respectively closes, opens 1/5, open 2/5, open 3/5, open 4/5, fully open, more preferably faster by engine exhaust discrimination
Pressure in pipe is stablized in setting state, and working efficiency is improved.
A kind of control system of engine exhaust back pressure, including enmgine exhaust 1, valve 2 and escape pipe 3, valve 2
It is mounted between enmgine exhaust 1 and escape pipe 3, for controlling the on-off of enmgine exhaust 1, plays and directly control
The effect of pressure in enmgine exhaust 1；This system further includes for the Electric Actuator 4 of control valve 2, pressure controller
5 and pressure sensor 6, Electric Actuator 4 is by pressure controller 5 and 6 circuit connection of pressure sensor, and pressure sensor 6 is also
It is connect with enmgine exhaust 1, Electric Actuator 4 is connect with valve 2, for driving the opening and closing of valve 2.Pass through pressure sensing
Device 6 acquires the pressure of gas in enmgine exhaust 1 in real time, and the pressure value is sent to pressure control as electronic signals
Instrument 5 processed is converted into the setting value that corresponding reduced value has been set with it and compares；According to comparing result, then by pressure controller
5 send the opening and closing that driving electric signal drives valve 2 to Electric Actuator 4, realize the automatic control to engine exhaust back pressure,
The stability for improving exhaust back pressure alleviates the burden of engineering staff, effectively increases working efficiency.
When because of engine operation, gas temperature with higher in enmgine exhaust 1, directly by pressure sensor
6 are placed in the damage that measurement in enmgine exhaust be easy to cause pressure sensor 6, so this system further includes a conduction mechanism
7, pressure sensor 6 sets one on enmgine exhaust 1 by conduction mechanism 7 and 1 piping connection of enmgine exhaust
Conduction mechanism 7 is connected to pressure sensor 6, thus make pressure sensor 6 and enmgine exhaust 1 that there is a certain distance, one
Aspect is conducive to engineering staff and overhauls to the replacement of pressure sensor 6, on the other hand also avoids because in enmgine exhaust 1
Gas temperature it is excessively high and damage pressure sensor 6.And conduction mechanism 7 includes heat radiation conduit 72 and connecting conduit 71, pressure passes
Sensor 6 passes through connecting conduit 71 and heat radiation conduit 72 and 1 piping connection of enmgine exhaust.
In this example, heat radiation conduit 72 is aluminum conduit, for dropping to the high-temperature gas in enmgine exhaust 1
Temperature keeps the gas temperature for being transported to pressure sensor 6 moderate, preferably to protect pressure sensor 6.Outside heat radiation conduit 72
It encloses and is additionally provided with multiple cooling fins 8, specifically, cooling fin 8 is uniformly welded on the outer wall of heat radiation conduit 72.The cooling fin 8 has
Effect increases 72 heat dissipation area of heat radiation conduit, and the temperature for being transmitted to heat radiation conduit 72 from high-temperature gas is made quickly to be dispersed into sky
In gas, so that making the temperature of high-temperature gas quickly reduces.Valve 2 is a butterfly valve, easily controllable, and is easy to gas row when its unlatching
Out.Electric Actuator 4 is a stepper motor, specifically, the output end of the stepper motor is connect with the rotating fulcrum of valve 2, it is real
Show the accurate unlatching of valve 2, preferably controls the pressure in enmgine exhaust 1.
The working principle of the invention is: the valve 2 of the system is in normally off, and pressure controller 5 is preset with six
A setting value, corresponding six pressure values of this six setting values.
When starting to start to work, along blocking of the gas of the transmission of enmgine exhaust 1 at valve 2 by valve 2
And it gathers, while the gas is also along conduction mechanism 7 to pressure sensor 6；Pressure sensor 6 in real time carries out the pressure of gas
Acquisition, and collected pressure conversion is sent to pressure controller 5 at electric signal；The telecommunications that pressure controller 5 will receive
Number be converted into corresponding reduced value compares with setting value；According to the setting value determined after comparison, pressure controller 5 issues phase
The control electric signal answered to stepper motor, stepper motor driven valve door 2 is acted.
If it is determined that illustrating the pressure in enmgine exhaust 1 when current setting value is less than or equal to normal pressure value
Value is less than or equal to normal pressure value, and pressure controller 5 does not issue control electric signal, i.e. stepper motor does not start, and valve 2 is in
Closed state；
If it is determined that illustrating that the pressure value in enmgine exhaust 1 is greater than when current setting value is greater than normal pressure value
Normal pressure value, pressure controller 5 issue corresponding control signal to stepper motor driven valve door 2 according to setting value at this time,
According to current setting value, the open area of valve 2 is the 1/5 or 2/5 or 3/5 or 4/5 of total open area or fully opens.
What has been described above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art,
Without departing from the structure of the invention, several modifications and improvements can also be made, these all will not influence implementation of the present invention
Effect and patent practicability.
Claims (9)
1. a kind of control method of engine exhaust back pressure, which is characterized in that pressure controller is according to pressure sensor from starting
The pressure value control Electric Actuator driving valve measured in machine exhaust manifold.
2. a kind of control method of engine exhaust back pressure according to claim 1, which is characterized in that pass through pressure sensing
Device acquires the pressure value in enmgine exhaust in real time, while the pressure value of gas is converted into corresponding electricity by pressure sensor
Signal is sent to the pressure controller.
3. a kind of control method of engine exhaust back pressure according to claim 2, which is characterized in that the pressure control
Instrument processed presets multiple setting values, and this method is further comprising the steps of:
(1) electric signal described in is converted into corresponding reduced value by pressure controller；
(2) reduced value is compared with the setting value；
(3) pressure controller described in issues corresponding driving electric signal to Electric Actuator according to comparing result；
(4) Electric Actuator described in drives valve to be acted accordingly according to the driving electric signal.
4. a kind of control system of engine exhaust back pressure, including enmgine exhaust (1), valve (2) and escape pipe (3),
It is characterized in that, the valve (2) is mounted between enmgine exhaust (1) and escape pipe (3), it further include for controlling
Electric Actuator (4), pressure controller (5) and the pressure sensor (6) of valve (2), the Electric Actuator (4) pass through pressure
Power controller (5) and pressure sensor (6) circuit connection, the pressure sensor (6) also connect with enmgine exhaust (1)
It connects, the Electric Actuator (4) is connect with valve (2).
5. a kind of control system of engine exhaust back pressure according to claim 4, which is characterized in that further include a conduction
Mechanism (7), the pressure sensor (6) pass through conduction mechanism (7) and enmgine exhaust (1) piping connection.
6. a kind of control system of engine exhaust back pressure according to claim 5, which is characterized in that the conduction machine
Structure (7) includes heat radiation conduit (72) and connecting conduit (71), and the pressure sensor (6) is led by connecting conduit (71) and heat dissipation
Manage (72) and enmgine exhaust (1) piping connection.
7. a kind of control system of engine exhaust back pressure according to claim 6, which is characterized in that the heat dissipation is led
The periphery for managing (72) is equipped with multiple cooling fins (8).
8. a kind of control system of engine exhaust back pressure according to claim 4, which is characterized in that the valve
It (2) is a butterfly valve.
9. a kind of control system of engine exhaust back pressure according to claim 4, which is characterized in that described electronic to hold
Row device (4) is a stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460982.5A CN110043374A (en) | 2019-05-30 | 2019-05-30 | A kind of control method and system of engine exhaust back pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460982.5A CN110043374A (en) | 2019-05-30 | 2019-05-30 | A kind of control method and system of engine exhaust back pressure |
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| Publication Number | Publication Date |
|---|---|
| CN110043374A true CN110043374A (en) | 2019-07-23 |
Family
ID=67284192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910460982.5A Pending CN110043374A (en) | 2019-05-30 | 2019-05-30 | A kind of control method and system of engine exhaust back pressure |
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| CN (1) | CN110043374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756998A (en) * | 2021-09-02 | 2021-12-07 | 宁波协诚电动工具有限公司 | Method for acquiring air flow and commercial vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294357A (en) * | 1994-04-28 | 1995-11-10 | Suzuki Motor Corp | Piping structure of pressure sensor |
| JPH10220305A (en) * | 1997-02-10 | 1998-08-18 | Isuzu Motors Ltd | Egr device with intercooler |
| JP2001073741A (en) * | 1999-09-08 | 2001-03-21 | Isuzu Ceramics Res Inst Co Ltd | Egr system of engine |
| US20030023367A1 (en) * | 2001-07-27 | 2003-01-30 | Avery Richard Michael | Engine control based on exhaust back pressure |
| CN203050896U (en) * | 2012-12-18 | 2013-07-10 | 北汽福田汽车股份有限公司 | Engine exhaust emission back pressure automatic control device |
| US20130219902A1 (en) * | 2012-02-27 | 2013-08-29 | Hamilton Sundstrand Corporation | Burner pressure transducer thermal management design |
| CN209855909U (en) * | 2019-05-30 | 2019-12-27 | 广西玉柴机器股份有限公司 | Control system of engine exhaust back pressure |
-
2019
- 2019-05-30 CN CN201910460982.5A patent/CN110043374A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294357A (en) * | 1994-04-28 | 1995-11-10 | Suzuki Motor Corp | Piping structure of pressure sensor |
| JPH10220305A (en) * | 1997-02-10 | 1998-08-18 | Isuzu Motors Ltd | Egr device with intercooler |
| JP2001073741A (en) * | 1999-09-08 | 2001-03-21 | Isuzu Ceramics Res Inst Co Ltd | Egr system of engine |
| US20030023367A1 (en) * | 2001-07-27 | 2003-01-30 | Avery Richard Michael | Engine control based on exhaust back pressure |
| US20130219902A1 (en) * | 2012-02-27 | 2013-08-29 | Hamilton Sundstrand Corporation | Burner pressure transducer thermal management design |
| CN203050896U (en) * | 2012-12-18 | 2013-07-10 | 北汽福田汽车股份有限公司 | Engine exhaust emission back pressure automatic control device |
| CN209855909U (en) * | 2019-05-30 | 2019-12-27 | 广西玉柴机器股份有限公司 | Control system of engine exhaust back pressure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756998A (en) * | 2021-09-02 | 2021-12-07 | 宁波协诚电动工具有限公司 | Method for acquiring air flow and commercial vehicle |
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Application publication date: 20190723 |
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