CN107559108A - A kind of control method and device of gas recirculation system by-passing valve - Google Patents
A kind of control method and device of gas recirculation system by-passing valve Download PDFInfo
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- CN107559108A CN107559108A CN201610505660.4A CN201610505660A CN107559108A CN 107559108 A CN107559108 A CN 107559108A CN 201610505660 A CN201610505660 A CN 201610505660A CN 107559108 A CN107559108 A CN 107559108A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 59
- 239000007924 injection Substances 0.000 claims abstract description 59
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000003247 decreasing effect Effects 0.000 claims description 14
- 239000007789 gas Substances 0.000 description 30
- 238000010586 diagram Methods 0.000 description 7
- 230000008450 motivation Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A kind of control method and device of gas recirculation system by-passing valve, methods described include：The circulating fuel injection quantity of engine is obtained, when the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine.Such scheme can improve the service life of gas recirculation system by-passing valve.
Description
Technical field
Automobile technical field of the present invention, more particularly to a kind of controlling party of gas recirculation system by-passing valve
Method and device.
Background technology
Waste gas recycling (Exhaust Gas Recirculation, EGR) is a kind of more general on internal combustion engine
Time technology, can effectively reduce the generation of the nitrogen oxides of diesel engine, improve anti-knock properties of gasoline engine etc..
Under most of heat engine operating conditions, the EGT of discharge is higher, it is necessary to which the waste gas of recycling is carried out
Engine is re-introduced into after cooling, and during the heat engine after cold post-start, in order to realize rapid warming-up,
Engine friction horsepower is reduced, then waste gas can not be cooled down, and therefore, be added in most of egr systems
EGR by-passing valves, to realize free switching that whether EGR gases cool down.
However, under the control logic that existing EGR by-passing valves open or close, EGR by-passing valves can go out
Existing unusual fluctuation, so as to reduce the service life of by-passing valve.
The content of the invention
Present invention solves the technical problem that it is to provide a kind of side for controlling the opening and closing of gas recirculation system by-passing valve
Method and device, so as to improve the service life of by-passing valve.
To solve the above problems, the present invention provides a kind of extracting method of information point in data on flows, it is described
Method includes：
Obtain the circulating fuel injection quantity of engine；
When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein, the demarcation
Speed and gear of the threshold value based on NEDC state of cyclic operations determine.
Alternatively, the control method of the gas recirculation system by-passing valve, in addition to：
When the circulating fuel injection quantity demarcation threshold value is decreased to less than from the value more than the demarcation threshold value
When being worth and exceeding preset time period less than the duration of the demarcation threshold value, the by-passing valve is opened in control.
Alternatively, the preset time period is 60s~90s.
Alternatively, the control method of the gas recirculation system by-passing valve, in addition to：
Obtain the current rotating speed of the engine；
When the current rotating speed of the engine is more than setting speed, the by-passing valve is closed in control.
Alternatively, the control method of the gas recirculation system by-passing valve, in addition to：
Obtain engine cold starting time and engine water temperature；
When being less than desired temperature less than setting time or engine water temperature between when cold startingengines,
By-passing valve is controlled to open.
The embodiment of the present invention additionally provides a kind of control device of gas recirculation system by-passing valve, including：
Distributive value acquiring unit, suitable for obtaining the circulating fuel injection quantity of engine；
First control unit, suitable for when the circulating fuel injection quantity is more than demarcation threshold value, bypass is closed in control
Valve, wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine.
Alternatively, the control device of the gas recirculation system by-passing valve, in addition to：
Second control unit, suitable for being decreased to when the circulating fuel injection quantity from the value more than the demarcation threshold value
When less than the value for demarcating threshold value and exceeding preset time period less than the duration of the demarcation threshold value,
The by-passing valve is opened in control.
Alternatively, the control device of the gas recirculation system by-passing valve, the preset time period are
60s~90s.
Alternatively, the control device of the gas recirculation system by-passing valve, in addition to：
Rotating speed acquiring unit, suitable for obtaining the current rotating speed of the engine；
3rd control unit, suitable for when the current rotating speed of the engine is more than setting speed, control is closed
Close the by-passing valve.
Alternatively, the control device of the gas recirculation system by-passing valve, in addition to：
Temperature acquiring unit, suitable for obtaining engine cold starting time and engine water temperature；
Engine cold starting time acquisition unit, suitable for obtaining the engine cold starting time；
4th control unit, suitable for being less than setting time or engine water temperature between when cold startingengines
During less than desired temperature, control by-passing valve is opened.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantages that：
The embodiment of the present invention is by obtaining the circulating fuel injection quantity of engine, when the circulating fuel injection quantity is more than mark
When determining threshold value, by-passing valve is closed in control, wherein, the demarcation car of the threshold value based on NEDC state of cyclic operations
Speed and gear determine, due to by-passing valve be controlled in engine fuel consumption it is larger when be closed all the time,
So the exhaust back pressure larger when engine fuel consumption is larger can be avoided to cause greater impact to valve block,
And then the service life of by-passing valve can be increased.
Further, the embodiment of the present invention passes through when the circulating fuel injection quantity is from more than the demarcation threshold value
When value is decreased to less than the value of the demarcation threshold value and exceedes default less than the duration for demarcating threshold value
Between section when, the by-passing valve is opened in control, so as to avoid in actually driving, distributive value it is larger and compared with
The by-passing valve brought between small during frequent switching frequently switches on action, and then improves the endurance quality of by-passing valve.
Further, by setting when the current rotating speed of the engine is more than setting speed, control is closed
The by-passing valve is closed, so as to avoid in engine gear because of the by-passing valve of circulating fuel injection quantity smaller triggering
Action, so as to improve the endurance quality of by-passing valve, increases the service life of by-passing valve.
Brief description of the drawings
Fig. 1 is a kind of flow of the control method of gas recirculation system by-passing valve in the embodiment of the present invention
Figure；
Fig. 2 is the stream of the control method of another gas recirculation system by-passing valve in the embodiment of the present invention
Cheng Tu；
Fig. 3 is the stream of the control method of another gas recirculation system by-passing valve in the embodiment of the present invention
Cheng Tu；
Fig. 4 is the structure of the control device of the huge system of another gas recirculation system in the embodiment of the present invention
Schematic diagram；
Fig. 5 is the knot of the control device of another gas recirculation system by-passing valve in the embodiment of the present invention
Structure schematic diagram；
Fig. 6 is the knot of the control device of another gas recirculation system by-passing valve in the embodiment of the present invention
Structure schematic diagram.
Embodiment
As it was previously stated, EGR by-passing valves are added in most of egr systems, to realize EGR gases
The free switching whether cooled down.However, under the control logic that existing EGR by-passing valves open or close,
Unusual fluctuation occurs in EGT by-passing valves, so as to reduce the service life of by-passing valve.
The embodiment of the present invention is by obtaining the circulating fuel injection quantity of engine, when the circulating fuel injection quantity is more than mark
When determining threshold value, by-passing valve is closed in control, wherein, the demarcation car of the threshold value based on NEDC state of cyclic operations
Speed and gear determine, due to by-passing valve be controlled in engine fuel consumption it is larger when be closed all the time,
So the exhaust back pressure larger when engine fuel consumption is larger can be avoided to cause greater impact to valve block,
And then the service life of by-passing valve can be increased.
It is understandable to enable above-mentioned purpose, feature and the beneficial effect of the present invention to become apparent, with reference to
Accompanying drawing is described in detail to the specific embodiment of the present invention.
Fig. 1 is a kind of structure of the control method of gas recirculation system by-passing valve in the embodiment of the present invention
Schematic diagram.Illustrated referring to Fig. 1.
Step S101：Obtain the circulating fuel injection quantity of engine；
Step S102：When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein,
Speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine.
In specific implementation, the control logic of the gas recirculation system by-passing valve can be write
ECU (Electronic Control Unit, electronic control unit), so as to control vacuum by ECU
The break-make of magnetic valve is turned on or off the purpose of by-passing valve to reach.
In specific implementation, the magnitude relationship of the value and the demarcation threshold value of the circulating fuel injection quantity is judged,
When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control.Wherein, the demarcation threshold value
Based on NEDC (New European Driving Cycle, new European vehicle driving cycle) state of cyclic operation
Speed, gear determine.In one embodiment, can be according to car weight, speed, vehicle resistance coefficient, biography
The operation area of the NEDC operating modes of the anti-release engine of dynamic ratio, transmission efficiency, and this region is wrapped
Network obtains the demarcation threshold value.
Specifically, can be hair according to NEDC state of cyclic operations Curve transform when being reflected on characteristic curve
The operation area of motivation NEDC operating modes, the curve for reflecting relation between engine speed and oil consumption is obtained, should
The ordinate value of curve characterizes the demarcation threshold value, and the engine operation region beyond NEDC regions
Belong to the larger region of circulating fuel injection quantity.
The embodiment of the present invention is by the way that when the circulating fuel injection quantity is more than the demarcation threshold value, control is closed other
Port valve, so as to avoid the exhaust back pressure larger when engine fuel consumption is larger from causing compared with favourable opposition valve block
Hit, and then the service life of by-passing valve can be increased.
Fig. 2 is the stream of the control method of another gas recirculation system by-passing valve in the embodiment of the present invention
Cheng Tu.Illustrated referring to Fig. 2.
Step S201：Obtain the circulating fuel injection quantity of engine；
Step S202：When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein,
Speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine；
Step S203：When the circulating fuel injection quantity is described from being decreased to less than more than the value for demarcating threshold value
When demarcating the value of threshold value and exceeding preset time period less than the duration for demarcating threshold value, control is opened
The by-passing valve.
In specific implementation, judge the circulating fuel injection quantity and the magnitude relationship of the demarcation threshold value, work as institute
When stating circulating fuel injection quantity more than demarcation threshold value, embodiment refer to the explanation of step S202 in Fig. 1,
This is repeated no more.
When the circulating fuel injection quantity demarcation threshold value is decreased to less than from the value more than the demarcation threshold value
When being worth and exceeding preset time period less than the duration of the demarcation threshold value, the by-passing valve is opened in control.
In specific implementation, the preset time period can take 60s-90s.
And in the prior art, if the switching of size oil mass is frequent, by-passing valve also can frequent movement, this hair
Bright embodiment is decreased to by judging whether the circulating fuel injection quantity is more than the value for demarcating threshold value from one
Exceed preset time period less than the value of the demarcation threshold value, and less than the duration of the demarcation threshold value,
In other words, the duration horizontal less than the small oil mass of the demarcation threshold value only is being switched to more than pre-
If just opening by-passing valve during the period, circulating fuel injection quantity is avoided to be less than the demarcation threshold value suddenly again rapid big
In the by-passing valve frequent movement that the demarcation threshold band is come, so as to reduce the action of by-passing valve, improve
The service life of by-passing valve.
Fig. 3 is the stream of the control method of another gas recirculation system by-passing valve in the embodiment of the present invention
Cheng Tu.Illustrated referring to Fig. 3.
Step S301：Obtain the circulating fuel injection quantity of engine；
Step S302：When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein,
Speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine；
Step S303：When the circulating fuel injection quantity is described from being decreased to less than more than the value for demarcating threshold value
When demarcating the value of threshold value and exceeding preset time period less than the duration for demarcating threshold value, control is opened
The by-passing valve；
Step S304：Obtain the current rotating speed of the engine；
Step S305：When the current rotating speed of the engine is more than setting speed, the side is closed in control
Port valve.
It should be noted that the implementation process of the present embodiment is not necessarily according to the order of step shown in Fig. 3.
In the present embodiment, on the basis of corresponding to the control logic in embodiment in fig. 1 and 2, hair is added
The judgement of the current rotating speed of motivation.
In specific implementation, as long as meeting the either condition in step S302 and step S305, control
The by-passing valve is closed.In other words, when the circulating fuel injection quantity is more than demarcation threshold value, or institute is worked as
When stating the current rotating speed of engine and being more than setting speed, the by-passing valve is controlled to close.
Wherein, step S302 explanation is identical with the description of the step S102, will not be repeated here.
In step S305 specific implementation, the setting speed can carry out different settings as needed.
For example, can set in the range of speeds of the engine more than more than 850r/min, by-passing valve is closed in control.
In existing control logic, it is specified that when the distributive value of engine is less than oil spout corresponding to current rotating speed
When measuring threshold value, by-passing valve is opened.For example, a certain specific rotation speeds scope is corresponding with distributive value threshold value, please join
1 is shown in Table, Speed unit is r/min in table, and distributive value unit is mg/tr.
Table 1
| Rotating speed | 400 | 600 | 800 | 850 | 1000 | 2000 | 3000 | 4000 |
| Distributive value threshold value | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
When the rotating speed of engine is in a certain scope, if corresponding circulating fuel injection quantity is less than in table one
By-passing valve is opened in distributive value threshold value corresponding to rotating speed, then control.Such as gearshift when engine current rotating speed
For 1000r/min, distributive value is reduced to rapidly 0mg/tr, less than distributive value threshold value 8mg/tr, then opens other
Port valve, if distributive value becomes greater than 8mg/tr again, by-passing valve is turned off, therefore by-passing valve may
There is frequent movement.
And in the present embodiment, can be by the way that rotating speed is more than into the later distributive value threshold modifying of certain value
One negative value, such as it is changed to -50, then when the current rotating speed of engine is larger, even if distributive value reduces
The breakdown action of by-passing valve will not be also triggered for 0.For example, can be above or equal to 850r/min hair
Distributive value threshold modifying corresponding to motivation rotating speed is -50, then under the engine speed more than 850r/min,
By-passing valve is closed in control, so as to avoid what is occurred in heat engine gearshift and other small oil mass stable operations
By-passing valve different condition, that is, it is in the presence of opening and but opens.
In specific implementation, engine cold starting time and engine water temperature can also be obtained, increase is following
Control logic：
It is less than setting time control by-passing valve between when cold startingengines to open, or works as engine water temperature
During less than desired temperature, control by-passing valve is opened.Wherein, the setting time and temperature setting
Value is threshold value set in advance, to set the condition that by-passing valve is opened.
In specific implementation, the engine cold starting time is that water temperature is less than a certain temperature when engine starts
Spend the time of (such as 55 degrees Celsius).If the time is less than the setting time (such as 300s),
It is required that open by-passing valve.
, can be by receiving engine water described in the signal acquisition of external temperature sensor in specific implementation
Temperature, the desired temperature could be arranged to 60 degrees Celsius.
It is " described to be decreased to when the circulating fuel injection quantity from the value more than the demarcation threshold value in specific implementation
Exceed preset time period less than the value for demarcating threshold value and less than the duration of the demarcation threshold value ",
It is any in " the engine cold starting time is less than setting time " and " engine water temperature is set less than temperature "
Condition meets, then controls the by-passing valve to open.
The embodiment of the present invention is by obtaining the circulating fuel injection quantity of engine, when the circulating fuel injection quantity is more than mark
When determining threshold value, by-passing valve is closed in control, wherein, the demarcation car of the threshold value based on NEDC state of cyclic operations
Speed and gear determine, due to by-passing valve be controlled in engine fuel consumption it is larger when be closed all the time,
So the exhaust back pressure larger when engine fuel consumption is larger can be avoided to cause greater impact to valve block,
And then the service life of by-passing valve can be increased.
Further, the embodiment of the present invention passes through when the circulating fuel injection quantity is from more than the demarcation threshold value
When value is decreased to less than the value of the demarcation threshold value and exceedes default less than the duration for demarcating threshold value
Between section when, the by-passing valve is opened in control, so as to avoid in actually driving, distributive value it is larger and compared with
The by-passing valve brought between small during frequent switching frequently switches on action, and then improves the endurance quality of by-passing valve.
Further, by setting when the current rotating speed of the engine is more than setting speed, control is closed
The by-passing valve is closed, so as to avoid in engine gear because of the by-passing valve of circulating fuel injection quantity smaller triggering
Action, so as to improve the endurance quality of by-passing valve, increases the service life of by-passing valve.
Device corresponding to the control method of the gas recirculation system by-passing valve of the embodiment of the present invention is entered below
Row explanation.
Fig. 4 is a kind of structure of the control device of gas recirculation system by-passing valve in the embodiment of the present invention
Schematic diagram.As shown in figure 4, the control device 40 can include distributive value acquiring unit 401 and first
Control unit 402.Wherein：
The distributive value acquiring unit 401, suitable for obtaining the circulating fuel injection quantity of engine；
First control unit 402, suitable for when the circulating fuel injection quantity is more than demarcation threshold value, control is closed
By-passing valve is closed, wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine.
The implementation of first control unit 402, can refer to the related description of step S102 in Fig. 1,
This is not being repeated.
The embodiment of the present invention is by obtaining the circulating fuel injection quantity of engine, when the circulating fuel injection quantity is more than mark
When determining threshold value, by-passing valve is closed in control, wherein, the demarcation car of the threshold value based on NEDC state of cyclic operations
Speed and gear determine, due to by-passing valve be controlled in engine fuel consumption it is larger when be closed all the time,
So the exhaust back pressure larger when engine fuel consumption is larger can be avoided to cause greater impact to valve block,
And then the service life of by-passing valve can be increased.
Fig. 5 is a kind of structure of the control device of gas recirculation system by-passing valve in the embodiment of the present invention
Schematic diagram.As shown in figure 5, the control device 50 can include distributive value acquiring unit 501, first
The control unit 503 of control unit 502 and second.Wherein：
The distributive value acquiring unit 501, suitable for obtaining the circulating fuel injection quantity of engine；
First control unit 502, suitable for when the circulating fuel injection quantity is more than demarcation threshold value, control is closed
By-passing valve is closed, wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine；
Second control unit 503, suitable for when the circulating fuel injection quantity is from more than the value for demarcating threshold value
It is decreased to less than the value of the demarcation threshold value and the duration less than the demarcation threshold value exceedes preset time
The by-passing valve is opened in Duan Shi, control.
In specific implementation, the value of the preset time period can be the arbitrary value in the range of 60s-90s,
Including 60s and 90s.Such as preset time period value 60s, if the circulation spray of the intrinsic motivation in 60s
Oil mass is switched to less than the demarcation threshold value from more than the demarcation threshold value, then does not open the by-passing valve,
And if the circulating fuel injection quantity of engine from more than it is described demarcation threshold value switch to less than the demarcation threshold value,
And the duration less than the demarcation threshold value is more than or equal to 60s, then the by-passing valve is opened in control.
The embodiment of the present invention is by obtaining the circulating fuel injection quantity of engine, when the circulating fuel injection quantity is more than mark
When determining threshold value, by-passing valve is closed in control, wherein, the demarcation car of the threshold value based on NEDC state of cyclic operations
Speed and gear determine, due to by-passing valve be controlled in engine fuel consumption it is larger when be closed all the time,
So the exhaust back pressure larger when engine fuel consumption is larger can be avoided to cause greater impact to valve block,
And then the service life of by-passing valve can be increased.
Further, the embodiment of the present invention passes through when the circulating fuel injection quantity is from more than the demarcation threshold value
When value is decreased to less than the value of the demarcation threshold value and exceedes default less than the duration for demarcating threshold value
Between section when, the by-passing valve is opened in control, so as to avoid in actually driving, distributive value it is larger and compared with
The by-passing valve brought between small during frequent switching frequently switches on action, and then improves the endurance quality of by-passing valve.
Fig. 6 is the knot of the control device of another gas recirculation system by-passing valve in the embodiment of the present invention
Structure schematic diagram.The control device 60 of gas recirculation system by-passing valve as shown in Figure 6, spray can be included
Oil mass acquiring unit 601, the first control unit 602 and, the second control unit 603, rotating speed acquiring unit
604 and the 3rd control unit 605.Wherein：
The distributive value acquiring unit 601, suitable for obtaining the circulating fuel injection quantity of engine；
First control unit 602, suitable for when the circulating fuel injection quantity is more than demarcation threshold value, control is closed
By-passing valve is closed, wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine；
Second control unit 603, suitable for when the circulating fuel injection quantity is from more than the value for demarcating threshold value
It is decreased to less than the value of the demarcation threshold value and the duration less than the demarcation threshold value exceedes preset time
The by-passing valve is opened in Duan Shi, control；
The rotating speed acquiring unit 604, suitable for obtaining the current rotating speed of the engine；
3rd control unit 605, suitable for when the current rotating speed of the engine is more than setting speed,
The by-passing valve is closed in control.
In specific implementation, the distributive value acquiring unit 601, the first control unit 602 and, second control
Unit 603 processed, the control unit 605 of rotating speed acquiring unit 604 and the 3rd can be used as corresponding in ECU
Functional module, the purpose of by-passing valve is turned on and off to reach by controlling the break-make of vacuum solenoid.
The present embodiment adds the judgement to rotating speed on the basis of described control logic in Figure 5, passes through
Setting when the current rotating speed of the engine is more than setting speed, the by-passing valve is closed in control, so as to
Avoid in engine gear because the smaller triggering of circulating fuel injection quantity by-passing valve action, so as to improve bypass
The endurance quality of valve, increase the service life of by-passing valve.
In specific implementation, the control device 60 of the gas recirculation system by-passing valve can also include：
Temperature acquiring unit 606, the control unit 608 of engine cold starting time acquisition unit 607 and the 4th.
The temperature acquiring unit 606, suitable for obtaining engine cold starting time and engine water temperature.
The engine cold starting time acquisition unit 607, suitable for obtaining the engine cold starting time.
4th control unit 608, suitable for being less than setting time between when cold startingengines or starting
When machine water temperature is less than desired temperature, control by-passing valve is opened.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment
Suddenly it is that by program the hardware of correlation can be instructed to complete, the program can be stored in can with computer
Read in storage medium, storage medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (10)
- A kind of 1. control method of gas recirculation system by-passing valve, it is characterised in that including：Obtain the circulating fuel injection quantity of engine；When the circulating fuel injection quantity is more than demarcation threshold value, by-passing valve is closed in control, wherein, the demarcation threshold It is worth the speed based on NEDC state of cyclic operations and gear determines.
- 2. the control method of gas recirculation system by-passing valve according to claim 1, its characteristic value are, Also include：The value of the demarcation threshold value is decreased to less than from the value more than the demarcation threshold value when the circulating fuel injection quantity And when exceeding preset time period less than the duration of the demarcation threshold value, the by-passing valve is opened in control.
- 3. the control method of gas recirculation system by-passing valve according to claim 2, it is characterised in that The preset time period is 60s~90s.
- 4. the control method of gas recirculation system by-passing valve according to claim 1, it is characterised in that Also include：Obtain the current rotating speed of the engine；When the current rotating speed of the engine is more than setting speed, the by-passing valve is closed in control.
- 5. the control method of gas recirculation system by-passing valve according to claim 1, it is characterised in that Also include：Obtain engine cold starting time and engine water temperature；When being less than desired temperature less than setting time or engine water temperature between when cold startingengines, control By-passing valve processed is opened.
- A kind of 6. control device of gas recirculation system by-passing valve, it is characterised in that including：Distributive value acquiring unit, suitable for obtaining the circulating fuel injection quantity of engine；First control unit, suitable for when the circulating fuel injection quantity is more than demarcation threshold value, controlling and closing by-passing valve,Wherein, speed and gear of the demarcation threshold value based on NEDC state of cyclic operations determine.
- 7. the control device of gas recirculation system by-passing valve according to claim 6, it is characterised in that Also include：Second control unit is small suitable for being decreased to when the circulating fuel injection quantity from the value more than the demarcation threshold value In it is described demarcation threshold value value and less than it is described demarcation threshold value duration exceed preset time period when, The by-passing valve is opened in control.
- 8. the control device of gas recirculation system by-passing valve according to claim 7, it is characterised in that The preset time period is 60s~90s.
- 9. the control device of gas recirculation system by-passing valve according to claim 6, it is characterised in that Also include：Rotating speed acquiring unit, suitable for obtaining the current rotating speed of the engine；3rd control unit, suitable for when the current rotating speed of the engine is more than setting speed, control is closed The by-passing valve.
- 10. the control device of gas recirculation system by-passing valve according to claim 6, it is characterised in that Also include：Temperature acquiring unit, suitable for obtaining engine cold starting time and engine water temperature；Engine cold starting time acquisition unit, suitable for obtaining the engine cold starting time；4th control unit, suitable for being less than setting time between when cold startingengines or engine water temperature is low When desired temperature, control by-passing valve is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610505660.4A CN107559108B (en) | 2016-06-30 | 2016-06-30 | Control method and device for bypass valve of exhaust gas recirculation system |
Applications Claiming Priority (1)
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|---|---|---|---|---|
| FR2887592A1 (en) * | 2005-06-28 | 2006-12-29 | Valeo Systemes Thermiques | Internal combustion engine`s exhaust gas recirculation installation for motor vehicle, has control module detecting condensation state from exhaust gas recirculation`s dew temperature and temperature of exhaust gas recirculation cooler wall |
| CN101988447A (en) * | 2009-07-31 | 2011-03-23 | 福特环球技术公司 | Method for controlling an engine |
| EP2392808A1 (en) * | 2009-02-02 | 2011-12-07 | Toyota Jidosha Kabushiki Kaisha | Control device for internal combustion engine |
| CN105308295A (en) * | 2013-06-10 | 2016-02-03 | 丰田自动车株式会社 | Internal Combustion Engine Controls |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2887592A1 (en) * | 2005-06-28 | 2006-12-29 | Valeo Systemes Thermiques | Internal combustion engine`s exhaust gas recirculation installation for motor vehicle, has control module detecting condensation state from exhaust gas recirculation`s dew temperature and temperature of exhaust gas recirculation cooler wall |
| EP2392808A1 (en) * | 2009-02-02 | 2011-12-07 | Toyota Jidosha Kabushiki Kaisha | Control device for internal combustion engine |
| CN101988447A (en) * | 2009-07-31 | 2011-03-23 | 福特环球技术公司 | Method for controlling an engine |
| CN105308295A (en) * | 2013-06-10 | 2016-02-03 | 丰田自动车株式会社 | Internal Combustion Engine Controls |
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