CN105569862B - A kind of engine control and device - Google Patents
A kind of engine control and device Download PDFInfo
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- CN105569862B CN105569862B CN201510980306.2A CN201510980306A CN105569862B CN 105569862 B CN105569862 B CN 105569862B CN 201510980306 A CN201510980306 A CN 201510980306A CN 105569862 B CN105569862 B CN 105569862B
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- Prior art keywords
- rail pressure
- fuel delivery
- pressure sensor
- engine
- distributive value
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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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/141—Introducing closed-loop corrections characterised by the control or regulation method using a feed-forward control element
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
- F02D2041/223—Diagnosis of fuel pressure sensors
Abstract
The present invention relates to dynamical system control technology field, more particularly to a kind of engine control and device.Engine control provided by the invention, including：The first fuel delivery during engine steady state operation is calculated in the pid control algorithm built according to default rail pressure, measurement rail pressure, steady-state speed, stable state distributive value and the first fuel delivery associated storage generation MAP tables when engine steady state is run；When judging rail pressure sensor by electromagnetic interference according to the fluctuation situation of rail pressure sensor voltage signal, corresponding fuel delivery is inquired about from MAP tables according to the current rotating speed of engine and current distributive value, and obtain feedforward fuel delivery corresponding to current rotating speed and current distributive value, using the fuel delivery that inquires and feedforward fuel delivery sum as treating fuel delivery, and according to treating fuel delivery control rail pressure.This method can be when rail pressure sensor be by electromagnetic interference, and not increasing filter circuit can ensure that engine controller is accurately controlled the rail pressure of engine.
Description
Technical field
The present invention relates to dynamical system control technology field, more particularly to a kind of engine control and device.
Background technology
At present, the action of electric-control motor is controlled by engine controller (ECU).Electric-control motor relies on
The measurement rail pressure of rail pressure sensor feedback carries out fuel delivery control and injection control, when measurement rail pressure is less than setting value, ECU
Think without enough high pressure fuels, engine stop oil spout can be controlled, shut down.The oil pressure of engine is by installed in hydraulic oil
What the PRV valves on rail were controlled, when the measurement rail pressure in high pressure oil rail exceedes setting value, PRV valves, which automatically open up, to be let out
Pressure.
However, influence of the electromagnetic interference to electric-control motor is very important：Electromagnetic interference gently then causes engine to turn
The failures such as fast fluctuation, false alarm, it is heavy then engine appearance shutdown, PRV valves can be caused the failure such as to wash open.For example, if electromagnetism is done
Disturbing causes rail pressure sensor distorted signals, and the measurement rail pressure signal of rail pressure sensor feedback can not truly reflect high pressure oil rail
In fuel pressure, now if engine controller ECU carries out fuel delivery control still according to measurement rail pressure signal, injection is controlled
System, it will the problems such as shutting down, PRV valves are rushed to open, the fluctuation of speed occur, influence the normal work of engine.
At this stage, it is more to prevent influence that electromagnetic interference is controlled engine using hardware filtering circuit is increased, however, this
Cost of the kind method in very conference increase engine.
The content of the invention
In order in the case where not increasing filter circuit, avoid the engine caused by rail pressure sensor is by electromagnetic interference
Controller can not be accurately controlled the rail pressure of engine, and the invention provides a kind of engine control and device.
The first aspect of the present invention provides a kind of engine control, including：
The during engine steady state operation is calculated in S1, the pid control algorithm built according to default rail pressure, measurement rail pressure
One fuel delivery, obtain engine steady state operation when steady-state speed, stable state distributive value, by first fuel delivery, steady-state speed,
Stable state distributive value associated storage generates MAP tables；
S2, according to the fluctuation situation of rail pressure sensor voltage signal, judge rail pressure sensor whether by electromagnetic interference；
S3, when judging rail pressure sensor by electromagnetic interference, according to the current rotating speed of engine and current distributive value from
Corresponding fuel delivery is inquired about in the MAP tables, and obtains feedforward fuel delivery corresponding to current rotating speed and current distributive value, with inquiry
To fuel delivery and the feedforward fuel delivery sum as treating fuel delivery；
S4, treat that fuel delivery controls rail pressure according to described.
Further, the step S2 includes：
When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is different to judge that rail pressure sensor occurs
Often；
When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor
By electromagnetic interference.
Further, the step S1, including：
The calculated value of integral element in the pid control algorithm is exported, LPF calculation is carried out to the calculated value of output
Method handles to obtain first fuel delivery.
Further, the step S3, including：
Step S31, rail pressure sensor is judged with the presence or absence of exception, if in the absence of exception, into step S32；
Step S32, judges whether engine operation duration is more than the first preset duration, if being more than, into step S33；
Step S33, judges whether engine cooling water temperature exceedes preset temperature, if exceeding, into step S34；
Step S34, the first fuel feeding according to corresponding to pid control algorithm generates each steady-state speed and stable state distributive value group
Amount, each first fuel delivery is generated into MAP tables with corresponding steady-state speed and stable state distributive value group associated storage；
Step S35, real-time rail pressure, real-time rotating speed and real-time distributive value are obtained, calculated corresponding to the rail pressure in real time in real time
Fuel delivery, it is the real-time rotating speed by steady-state speed in the MAP tables, and stable state distributive value is corresponding to the distributive value in real time
First fuel delivery is updated to the real-time fuel delivery.
Further, when judging rail pressure sensor by electromagnetic interference, methods described also includes：
Rail pressure monitoring and/or distributive value control are carried out according to default rail pressure.
Further, methods described also includes：
When judging that electromagnetic interference occurs in rail pressure sensor, throttle caused by filtering out electromagnetic interference using big filtering algorithm is believed
Number shake.
Further, methods described also includes：
Judge rail pressure sensor by electromagnetic interference after, judge rail pressure sensor in the second preset duration persistently by
Electromagnetic interference.
To be conceived based on identical, the second aspect of the present invention provides a kind of engine control system, including：
Generation module, for engine steady state to be calculated according to the pid control algorithm of default rail pressure, measurement rail pressure structure
The first fuel delivery during operation, steady-state speed, stable state distributive value when engine steady state is run are obtained, by first fuel feeding
Amount, steady-state speed, stable state distributive value associated storage generation MAP tables；
Monitoring module, for the fluctuation situation according to rail pressure sensor voltage signal, judge rail pressure sensor whether by
Electromagnetic interference；
Enquiry module, for when judging rail pressure sensor by electromagnetic interference, according to the current rotating speed of engine and working as
Preceding distributive value inquires about corresponding fuel delivery from the MAP tables, and obtains feedforward corresponding to current rotating speed and current distributive value and supply
Oil mass, using the fuel delivery that inquires and the feedforward fuel delivery sum as treating fuel delivery；
Control module, for treating that fuel delivery controls rail pressure according to.
Further, the monitoring module is specifically used for：
When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is different to judge that rail pressure sensor occurs
Often；
When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor
By electromagnetic interference.
Further, the generation module is specifically used for：
The calculated value of integral element in the pid control algorithm is exported, LPF calculation is carried out to the calculated value of output
Method handles to obtain first fuel delivery.
Engine control provided by the invention, pass through the pid control algorithm built according to default rail pressure, measurement rail pressure
The first fuel delivery during engine steady state operation, steady-state speed, stable state distributive value when engine steady state is run is calculated
MAP tables are generated with the first fuel delivery associated storage；When according to the fluctuation situation of rail pressure sensor voltage signal judgement rail pressure sensing
When device is by electromagnetic interference, corresponding fuel delivery is inquired about from MAP tables according to the current rotating speed of engine and current distributive value, and
Obtain feedforward fuel delivery corresponding to current rotating speed and current distributive value, using the fuel delivery that inquires and feedforward fuel delivery sum as
Treat fuel delivery, and according to treating that fuel delivery controls rail pressure.So as to when rail pressure sensor is by electromagnetic interference, not increase filter
It can ensure that engine controller is accurately controlled the rail pressure of engine in the case of wave circuit, and then avoid because rail pressure passes
The problems such as sensor is shut down by engine caused by electromagnetic interference, PRV valves are rushed to open, the fluctuation of speed.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for the engine control that first embodiment of the invention provides；
Fig. 2 is the structural representation of high-pressure common-rail engine fuel oil system；
Fig. 3 is the schematic flow sheet of rail pressure control logic；
Fig. 4 is to judge whether rail pressure sensor electromagnetism occurs in the engine control that first embodiment of the invention provides
The schematic flow sheet of the step of embodiment of interference a kind of；
Fig. 5 is flow signal the step of MAP tables are generated in the engine control that first embodiment of the invention provides
Figure；
Fig. 6 is a kind of specific embodiment party that MAP tables are generated in the engine control that first embodiment of the invention provides
The schematic flow sheet of the step of formula；
Fig. 7 is the structural representation for the engine control system that second embodiment of the invention provides.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is further described.Following examples are only used for more
Clearly demonstrate technical scheme, and can not be limited the scope of the invention with this.
The engine control that first embodiment of the invention provides, as shown in figure 1, including：
The during engine steady state operation is calculated in S1, the pid control algorithm built according to default rail pressure, measurement rail pressure
One fuel delivery, obtain engine steady state operation when steady-state speed, stable state distributive value, by first fuel delivery, steady-state speed,
Stable state distributive value associated storage generates MAP tables；
S2, according to the fluctuation situation of rail pressure sensor voltage signal, judge rail pressure sensor whether by electromagnetic interference；
S3, when judging rail pressure sensor by electromagnetic interference, according to the current rotating speed of engine and current distributive value from
Corresponding fuel delivery is inquired about in the MAP tables, and obtains feedforward fuel delivery corresponding to current rotating speed and current distributive value, with inquiry
To fuel delivery and the feedforward fuel delivery sum as treating fuel delivery；
S4, treat that fuel delivery controls rail pressure according to described.
Engine control provided by the invention, pass through the pid control algorithm built according to default rail pressure, measurement rail pressure
The first fuel delivery during engine steady state operation, steady-state speed, stable state distributive value when engine steady state is run is calculated
MAP tables are generated with the first fuel delivery associated storage；When according to the fluctuation situation of rail pressure sensor voltage signal judgement rail pressure sensing
When device is by electromagnetic interference, corresponding fuel delivery is inquired about from MAP tables according to the current rotating speed of engine and current distributive value, and
Obtain feedforward fuel delivery corresponding to current rotating speed and current distributive value, using the fuel delivery that inquires and feedforward fuel delivery sum as
Treat fuel delivery, and according to treating that fuel delivery controls rail pressure.So as to when rail pressure sensor is by electromagnetic interference, not increase filter
It can ensure that engine controller is accurately controlled the rail pressure of engine in the case of wave circuit, and then avoid because rail pressure passes
The problems such as sensor is shut down by engine caused by electromagnetic interference, PRV valves are rushed to open, the fluctuation of speed.
In the specific implementation, the engine control provided using the present embodiment, can be total to high pressure as shown in Figure 2
The engine of rail engine fuel oil system carries out anti-electromagnetic interference control.
When being controlled to engine, as shown in figure 3, when rail pressure sensor is not affected by electromagnetic interference, use is existing
Normal route in technology is controlled to rail pressure；Started when rail pressure sensor is by electromagnetic interference using provided by the invention
Machine control method, i.e. alternative route control engine rail pressure.
At present, the normal route when engine controller is controlled to rail pressure is according to feedforward PID
PID control policy calculation is input to the fuel delivery in engine oil rail, for fuel-flow control rail pressure.Specifically, go out in engine
Before factory, the default rail pressure of engine oil rail has been correspondingly arranged for the height that engine throttle jams on.When throttle steps toward one
When positioning is put, the measurement rail pressure PID of rail pressure and rail pressure sensor can be preset according to corresponding to the throttle position
Pid control algorithm, so as to calculate default oil mass；Supplied by tabling look-up to obtain to feedover corresponding to engine speed and distributive value
Oil mass, using default oil mass with feedforward fuel delivery sum as the fuel delivery being input in oily rail, so as to be controlled to oily rail rail pressure
System.
In the specific implementation, the step S2 can include：
When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is different to judge that rail pressure sensor occurs
Often；
When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor
By electromagnetic interference.
In the specific implementation, it can judge that rail pressure sensor whether there is electromagnetic interference according to the flow shown in Fig. 4.
Being so designed that is advantageous in that, can quickly and accurately judge whether rail pressure sensor electromagnetic interference occurs.
In the specific implementation, the step S1, can include：
The calculated value of integral element in the pid control algorithm is exported, LPF calculation is carried out to the calculated value of output
Method handles to obtain first fuel delivery.
Being so designed that is advantageous in that, can avoid calculate make the first fuel delivery steady while treating that fuel delivery is too high
Change, so as to prevent PRV valves from washing open.
In the specific implementation, the calculated value of output can be handled according to following LPF algorithmic formula：
Wherein, y is the value of the first fuel delivery, and T is time constant；DT is sequential operation dispatching cycle；X is the calculating of output
Value；Y' represents the value for the first fuel delivery that a upper computation of Period goes out.
In the specific implementation, as shown in figure 5, the step S3, can include：
Step S31, rail pressure sensor is judged with the presence or absence of exception, if in the absence of exception, into step S32；
Step S32, judges whether engine operation duration is more than the first preset duration, if being more than, into step S33；
Step S33, judges whether engine cooling water temperature exceedes preset temperature, if exceeding, into step S34；
Step S34, the first fuel feeding according to corresponding to pid control algorithm generates each steady-state speed and stable state distributive value group
Amount, each first fuel delivery is generated into MAP tables with corresponding steady-state speed and stable state distributive value group associated storage；
Step S35, real-time rail pressure, real-time rotating speed and real-time distributive value are obtained, calculated corresponding to the rail pressure in real time in real time
Fuel delivery, it is the real-time rotating speed by steady-state speed in the MAP tables, and stable state distributive value is corresponding to the distributive value in real time
First fuel delivery is updated to the real-time fuel delivery.
It can quickly and accurately judge whether engine is in stable operation by the step S31 to the step S33
Whether state, rail pressure sensor are by electromagnetic interference, so as to obtain correct MAP tables.
Because the working environment of engine is continually changing (such as temperature and humidity environment), therefore engine is in stable state
During operation, even if its rotating speed is identical with distributive value, fuel delivery is also constantly changing.In addition, engine operating environments are typically slow
Slowly change, its fuel delivery is also slowly to change.Therefore by the step S34 to the step S35, can be passed in rail pressure
When electromagnetic interference occurs in sensor, obtain when being run when there is electromagnetic interference with rail pressure sensor closest to the engine steady state at moment
Fuel delivery treat fuel delivery as now engine so that treating that fuel delivery more conforms to actual demand, avoid treating fuel delivery
It is too high or too low.
In the specific implementation, because the change of engine speed and distributive value is very fast, and fluctuation be present, therefore in order to
Simplify MAP tables, it is convenient that first fuel delivery is inquired about.The MAP tables shown in table 1 can also be pre-set, in the MAP tables in advance
Scope and change step provided with engine speed and distributive value.
By taking the MAP tables shown in table 1 as an example, the range of speeds can be set as to 600-2600rpm, change step is
200rpm, can be 0-140mg/stroke, change step 20mg/stroke by distributive value range set.It is steady in engine
When state is run, real-time rail pressure, real-time rotating speed and real-time distributive value are obtained.First fuel feeding is calculated according to default rail pressure, real-time rail pressure
Amount；Determine that each first fuel delivery corresponding position and stores in MAP tables according to real-time rotating speed and real-time distributive value.
In the specific implementation, determine that each first fuel delivery corresponds in MAP tables according to real-time rotating speed and real-time distributive value
Position the step of, can include：
Real-time rotating speed and real-time distributive value are obtained, is determined in MAP tables with real-time rotating speed closest to the position where rotating speed,
This closest to be with the position corresponding to the immediate distributive value of real-time distributive value under rotating speed now the first fuel delivery should store
Position.In the specific implementation, real-time rotating speed includes fluctuation range corresponding to each engine speed in the MAP tables shown in table 1
Real-time rotating speed in preset rotation speed fluctuation range；Distributive value includes fluctuation range in default spray in real time corresponding to each distributive value
Real-time rotating speed in oil mass fluctuation range.
For example, engine speed is that rotating speed may range from 600 ± 99rpm in real time corresponding to 600rpm；Distributive value is
Real-time distributive value may range from 20 ± 9mg/stroke corresponding to 20.
Below to according to real-time rotating speed and real-time distributive value, determine in MAP tables with where real-time rotating speed closest to rotating speed
Position illustrates：
If real-time rotating speed is 750rpm, real-time distributive value is 35mg/stroke, then now calculates the first fuel delivery of acquisition
The position that engine speed is 800rpm in MAP tables shown in table 1 and distributive value is 40mg/stroke should be stored in.
Table 1
In the specific implementation, flow that can be as shown in Figure 6 generates MAP tables.In the specific implementation, when judgement rail pressure sensing
When device is by electromagnetic interference, methods described can also include：
Rail pressure monitoring and/or distributive value control are carried out according to default rail pressure.
Because when rail pressure sensor is by electromagnetic interference, measurement rail pressure is inaccurate, and is in the prior art basis
Measurement rail pressure is monitored alarm, and/or control distributive value to rail pressure.When rail pressure sensor is by electromagnetic interference, according to pre-
If rail pressure carries out rail pressure monitoring and/or distributive value control, the module that can avoid monitoring rail pressure are persistently alarmed, and/or ensures spray
Oil mass is in proper range.
In the specific implementation, methods described can also include：
When judging that electromagnetic interference occurs in rail pressure sensor, throttle caused by filtering out electromagnetic interference using big filtering algorithm is believed
Number shake.
Being so designed that is advantageous in that, can accurately control throttle to carry out fuel feeding to engine, and ensures that fuel feeding is stable.
In the specific implementation, methods described can also include：
Judge rail pressure sensor by electromagnetic interference after, judge rail pressure sensor in the second preset duration persistently by
Electromagnetic interference.
Being so designed that is advantageous in that, can avoid that rail pressure sensor is carried out with the presence or absence of electromagnetic interference to repeat judgement,
Improve the control efficiency of engine.
The engine control system that second embodiment of the invention provides, as shown in fig. 7, comprises：
Generation module 41 is steady for engine to be calculated according to the pid control algorithm of default rail pressure, measurement rail pressure structure
The first fuel delivery when state is run, steady-state speed, stable state distributive value when engine steady state is run are obtained, by first fuel feeding
Amount, steady-state speed, stable state distributive value associated storage generation MAP tables；
Monitoring module 42, for the fluctuation situation according to rail pressure sensor voltage signal, judge rail pressure sensor whether by
To electromagnetic interference；
Enquiry module 43, for when judging rail pressure sensor by electromagnetic interference, according to the current rotating speed of engine and
Current distributive value inquires about corresponding fuel delivery from the MAP tables, and obtains and feedovered corresponding to current rotating speed and current distributive value
Fuel delivery, using the fuel delivery that inquires and the feedforward fuel delivery sum as treating fuel delivery；
Control module 44, for treating that fuel delivery controls rail pressure according to.
In the specific implementation, monitoring module 42, can be specifically used for：
When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is different to judge that rail pressure sensor occurs
Often；
When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor
By electromagnetic interference.
In the specific implementation, generation module 41, can be specifically used for：
The calculated value of integral element in the pid control algorithm is exported, LPF calculation is carried out to the calculated value of output
Method handles to obtain first fuel delivery.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. engine control, it is characterised in that including：S1, first when engine steady state operation is calculated in the pid control algorithm built according to default rail pressure, measurement rail pressure supplies Oil mass, steady-state speed, stable state distributive value when engine steady state is run are obtained, by first fuel delivery, steady-state speed, stable state Distributive value associated storage generates MAP tables；S2, according to the fluctuation situation of rail pressure sensor voltage signal, judge rail pressure sensor whether by electromagnetic interference；S3, when judging rail pressure sensor by electromagnetic interference, according to the current rotating speed of engine and current distributive value from described Corresponding fuel delivery is inquired about in MAP tables, and obtains feedforward fuel delivery corresponding to current rotating speed and current distributive value, with what is inquired Fuel delivery is used as with the feedforward fuel delivery sum and treats fuel delivery；S4, treat that fuel delivery controls rail pressure according to described.
- 2. according to the method for claim 1, it is characterised in that the step S2 includes：When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is abnormal to judge that rail pressure sensor occurs；When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor by Electromagnetic interference.
- 3. according to the method for claim 1, it is characterised in that the step S1, including：The calculated value of integral element in the pid control algorithm is exported, the calculated value of output is carried out at LPF algorithm Reason obtains first fuel delivery.
- 4. according to the method for claim 2, it is characterised in that the step S3, including：Step S31, rail pressure sensor is judged with the presence or absence of exception, if in the absence of exception, into step S32；Step S32, judges whether engine operation duration is more than the first preset duration, if being more than, into step S33；Step S33, judges whether engine cooling water temperature exceedes preset temperature, if exceeding, into step S34；Step S34, the first fuel delivery according to corresponding to pid control algorithm generates each steady-state speed and stable state distributive value group will Each first fuel delivery and corresponding steady-state speed and stable state distributive value group associated storage generation MAP tables；Step S35, real-time rail pressure, real-time rotating speed and real-time distributive value are obtained, calculate the real-time fuel feeding corresponding to rail pressure in real time Amount, it is the real-time rotating speed by steady-state speed in the MAP tables, and stable state distributive value is first corresponding to the distributive value in real time Fuel delivery is updated to the real-time fuel delivery.
- 5. according to the method for claim 1, it is characterised in that described when judging rail pressure sensor by electromagnetic interference Method also includes：Rail pressure monitoring and/or distributive value control are carried out according to default rail pressure.
- 6. according to the method for claim 1, it is characterised in that also include：When judging that electromagnetic interference occurs in rail pressure sensor, throttle signal caused by filtering out electromagnetic interference using big filtering algorithm Shake.
- 7. method according to any one of claim 1 to 6, it is characterised in that also include：After judging rail pressure sensor by electromagnetic interference, judge rail pressure sensor in the second preset duration persistently by electromagnetism Interference.
- A kind of 8. engine control system, it is characterised in that including：Generation module, for engine steady state operation to be calculated according to the pid control algorithm of default rail pressure, measurement rail pressure structure When the first fuel delivery, obtain engine steady state operation when steady-state speed, stable state distributive value, will first fuel delivery, surely State rotating speed, stable state distributive value associated storage generation MAP tables；Monitoring module, for the fluctuation situation according to rail pressure sensor voltage signal, judge rail pressure sensor whether by electromagnetism Interference；Enquiry module, for when judging rail pressure sensor by electromagnetic interference, being sprayed according to the current rotating speed of engine with current Oil mass inquires about corresponding fuel delivery from the MAP tables, and obtains feedforward fuel delivery corresponding to current rotating speed and current distributive value, Using the fuel delivery that inquires and the feedforward fuel delivery sum as treating fuel delivery；Control module, for treating that fuel delivery controls rail pressure according to.
- 9. device according to claim 8, it is characterised in that the monitoring module is specifically used for：When the difference of two adjacent voltage signals of rail pressure sensor is more than preset value, it is abnormal to judge that rail pressure sensor occurs；When in preset time, when there is abnormal number and is more than preset times in rail pressure sensor, judgement rail pressure sensor by Electromagnetic interference.
- 10. device according to claim 8, it is characterised in that the generation module is specifically used for：The calculated value of integral element in the pid control algorithm is exported, the calculated value of output is carried out at LPF algorithm Reason obtains first fuel delivery.
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| CN201510980306.2A CN105569862B (en) | 2015-12-23 | 2015-12-23 | A kind of engine control and device |
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| CN201510980306.2A CN105569862B (en) | 2015-12-23 | 2015-12-23 | A kind of engine control and device |
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| CN106704011B (en) * | 2016-12-14 | 2019-05-10 | 中国第一汽车股份有限公司 | The method that rail pressure control optimizes under rail pressure sensor fault mode |
| CN112081676B (en) * | 2020-09-11 | 2022-11-04 | 一汽解放汽车有限公司 | Engine control method, device, equipment and medium |
| CN112253322B (en) * | 2020-10-20 | 2022-05-31 | 东风汽车集团有限公司 | Engine control method based on oil rail pressure sensor fault |
| CN114562377B (en) * | 2020-11-27 | 2023-03-21 | 长城汽车股份有限公司 | Method and device for controlling fuel injection quantity of vehicle engine, electronic equipment, storage medium and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102007030713A1 (en) * | 2007-07-02 | 2009-01-08 | Robert Bosch Gmbh | Method for plausibilizing the output signal of a rail pressure sensor |
| DE102008036299B3 (en) * | 2008-08-04 | 2009-12-03 | Mtu Friedrichshafen Gmbh | Method for regulating pressure of common-rail system on both sides of V-type internal combustion engine, involves correcting variables of both sided pressure controllers based on disturbance variable |
| JP5126196B2 (en) * | 2009-10-21 | 2013-01-23 | 株式会社デンソー | Fuel injection control device |
| CN103967675A (en) * | 2014-04-21 | 2014-08-06 | 北京理工大学 | Comprehensive collection system for diesel engine high pressure common rail oil atomizer |
| CN104213997B (en) * | 2014-07-31 | 2016-08-24 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Pressure control of common rail system method |
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