CN100516485C - Heavy Pressure charging thin combustion natural gas engine fuel supply controller - Google Patents
Heavy Pressure charging thin combustion natural gas engine fuel supply controller Download PDFInfo
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- CN100516485C CN100516485C CNB2007100782850A CN200710078285A CN100516485C CN 100516485 C CN100516485 C CN 100516485C CN B2007100782850 A CNB2007100782850 A CN B2007100782850A CN 200710078285 A CN200710078285 A CN 200710078285A CN 100516485 C CN100516485 C CN 100516485C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The present invention relates to a heavy charged lean-burn natural gas engine, specially, it relates to a heavy charged lean-burn natural gas engine fuel supply controller. It includes an engine parameter measurement module for providing engine rotating speed, engine air inlet pipe pressure, oxygen sensor parameter measurement, oxygen sensor delay, oxygen sensor parameter setting point, pedal position measurement and throttle current position, a fuel supply PID regulator, a throttle position PID regulator. a fuel supply signal output module for providing control output signal for fuel supply actuator and a throttle position control signal output module for providing control output signal for electronic throttle valve. It is characterized by that in the above-mentioned fuel supply PID regulator also is set a sensor transmission delay compensation module for delaying control quantity output and in the above-mentioned throttle position PID regulator also is set a throttle kenematic velocity limiting module.
Description
Technical field
The present invention relates to heavy Pressure charging thin combustion natural gas engine, particularly relate to a kind of heavy Pressure charging thin combustion natural gas engine fuel supply controller.
Background technique
Need to control the delivery volume of fuel in the working procedure of heavy Pressure charging thin combustion natural gas engine, adopt fuel control unit to control the fuel feed of motor, make motor be in the lean combustion state, reduce the heat load of motor, and reduce the fuel consumption of motor.
At present, the control mode of heavy Pressure charging thin combustion natural gas engine fuel supply controller adopts fuel supply control and Electronic Throttle Control.Fuel supply control is used to regulate the fuel feed of motor, its output is for the fuel supply signal output module, control fuel supply final controlling element provides fuel to motor, Electronic Throttle Control is used to regulate engine throttle position, its output signal is controlled the electronic throttle position for throttle position control signal output module.The closed loop control of a gain-integration-differential (PID) control module is adopted in its fuel supply control, lambda sensor parameter measurement, lambda sensor parameter set point, engine speed and engine air inlet tube pressure signal that the engine parameter measurement module is obtained offer pid control module, implement the PID closed loop control according to the error signal between the lambda sensor parameter set point, its output signal makes fuel supply signal output module output control signal, control fuel supply final controlling element.Engine fuel supply is regulated with fixing cycle output controlled quentity controlled variable, but engine working process is a process with delay component, because the reaction time of lambda sensor itself, and there is a segment distance sensor mounting point in cylinder, so the feedback output that outputs to lambda sensor of controlled quentity controlled variable needed through the regular hour, regardless of control action, in stage lag time, control action is immesurable to the influence of process variables, especially, caused time lag oxygen sensor signal can not quickly respond to control signal, made precision and the weak effect even the inefficacy of control.Electronic Throttle Control adopts a gain-integration-differential (PID) control module, the engine parameter measurement module provides foot treadle position measurement and closure current location, import this pid control module according to the position of motion of foot and the error between the current throttle position, pid control module attempts to eliminate error by the output of controlled quentity controlled variable again, make that the position of motion of foot is consistent as far as possible with current throttle position, though the speed of response of such controlling method closure can be very fast, but for supercharged engine, too fast closure movement velocity can make the rapid change of air inflow, cause the fuel supply precise decreasing of motor under the transient operation operating mode, Engine's Harmful Emission increases, and is unfavorable for environmental protection.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of heavy Pressure charging thin combustion natural gas engine fuel supply controller is provided, it makes oxygen sensor signal can quickly respond to control signal, avoid the too fast movement velocity of electronic throttle, improve the precision and the effect of control, and the precision that improves the fuel supply control of motor under the transient operation operating mode, the harmful row who reduces motor prevents thing.
The present invention adopts such technological scheme: a kind of heavy Pressure charging thin combustion natural gas engine fuel supply controller, include in order to engine speed to be provided, the engine charge pipe pressure, the lambda sensor parameter measurement, lambda sensor postpones, lambda sensor parameter set point, the engine parameter measurement module of pedal position measurement and closure current location, a fuel supply PID regulator and a throttle position PID regulator, and in order to provide to the fuel supply final controlling element control output signal the fuel supply signal output module and in order to provide to electronic throttle control output signal throttle position control signal output module, it is characterized in that in aforesaid fuel supply PID regulator, also being provided with and be used for sensor transmissions compensation of delay module that controlled quentity controlled variable output is delayed time, in aforesaid throttle position PID regulator, also be provided with closure movement velocity limiting module.
The present invention is used for the sensor transmissions compensation of delay module that output is delayed time to controlled quentity controlled variable owing to also being provided with in fuel supply PID regulator, it calculates the caused delay of delay of engine working process (engine speed, engine charge pipe pressure) and sensor mounting point and sensor itself, close-loop feedback control is carried out in compensation to the lambda sensor transmission delay, realization is exported controlled quentity controlled variable and is carried out compensation of delay, make oxygen sensor signal can quickly respond to control signal, thereby improved the precision and the effect of fuel supply control; Again owing to also be provided with closure movement velocity limiting module in the throttle position PID regulator, the closure movement velocity is limited, avoided the too fast movement velocity of closure, the precision of engine fuel supply is improved, improve the precision of the fuel supply control of motor under the transient operation operating mode, reduced the anti-thing of harmful row of motor.
Description of drawings
Fig. 1 is an embodiment of the invention schematic representation;
Fig. 2 is a fuel supply PID regulator control module schematic representation;
Fig. 3 is the PID Control of Electric Throttle Control System module diagram;
Fig. 4 is the software flow pattern of the embodiment of the invention.
Embodiment
Embodiment of the present invention are described with reference to the accompanying drawings.A kind of heavy Pressure charging thin combustion natural gas engine fuel supply controller as shown in Figure 1, it includes in order to engine speed 21 to be provided, engine charge pipe pressure 23, lambda sensor parameter measurement 24, lambda sensor postpones 20, lambda sensor parameter set point 29, the engine parameter measurement module 10 of pedal position measurement 40 and closure current location 47, a fuel supply PID regulator 11 and a throttle position PID regulator 15, and in order to provide to fuel supply final controlling element 13 control output signal fuel supply signal output module 12 and in order to provide to electronic throttle 16 control output signal throttle position control signal output module 15, in aforesaid fuel supply PID regulator 11, also be provided with and be used for sensor transmissions compensation of delay module that controlled quentity controlled variable output is delayed time, in aforesaid throttle position PID regulator 15, also be provided with closure movement velocity limiting module.Sensor transmissions compensation of delay module in the fuel supply PID regulator 11, be used for the delay of calculating sensor itself and because the delay that lambda sensor mounting point and engine operating condition (engine speed, suction press) cause, close-loop feedback control is carried out in compensation to the lambda sensor transmission delay, the delay that compensation engine working process and sensor bring.Closure movement velocity limiting module in the throttle position PID regulator 15 in order to the maximum movement speed of restriction closure, improves the instantaneous emission performance of motor.
Among the embodiment as shown in Figure 2, fuel supply PID regulator 11 is by gain-integration- differential control module 25,30,31 and sensor transmissions compensation of delay module form, sensor transmissions compensation of delay module includes sensor delay computing module 22 and time delay module 26, engine speed 21 in the engine parameter measurement module 10, the output signal end of engine charge pipe pressure 23 and lambda sensor delay 20 is connected with the input port of sensor delay computing module 22, the output of sensor delay computing module 22 is connected with time delay module 26, the input end of time delay module 26 is connected with gain-integration-differential control module output terminal, the lambda sensor parameter measurement 24 in this gain-integration-differential control module input end and the engine parameter measurement module 10 and the output terminal of lambda sensor parameter set point 29 are connected, and the output terminal of time delay module 26 is connected with the input end of fuel supply signal output module 12.The lambda sensor parameter measurement 24 that provides in the engine parameter measurement module 10 deducts lambda sensor parameter set point 29, be input to gain-integration-differential pid control module that gain module 25, integration module 30, differential module 31 constitutes as controlled quentity controlled variable, calculate the fuel supply controlled quentity controlled variable.The output signal input pickup of engine speed 21, engine charge pipe pressure 23 and lambda sensor delay 20 postpones in the computing module 22, carries out retardation by the following method and calculates:
Td＝KI+F(MAP，RPM)
In the formula, KI is the response time of sensor and the delay that the sensor mounting point causes, F (MAP, RPM) be the retardation relevant with engine operation condition, it is the function of engine charge pipe pressure (MAP) and rotating speed (RPM), and the KI value can be at 8-12ms, F (MAP, RPM) the desirable 400ms of representative value, and the high more F of RPM (MAP, RPM) more little, the big more F (MAP of MAP, RPM) more little, (MAP RPM) demarcates according to concrete engine model F.After having finished aforesaid retardation calculating, the fuel supply controlled quentity controlled variable that gain-integration-differential pid control module calculates is by time delay module 26 time-delays, delay in the compensation engine working process, pass through fuel supply signal output module 12 then, output signal control fuel supply final controlling element 13 fuel feeds in order to the control motor, the fuel supply final controlling element adopts gas nozzle usually, finishes the fuel supply of motor.
Embodiment as shown in Figure 3, throttle position PID regulator 15 is by gain-integration- differential control module 42,44,48 and closure movement velocity limiting module form, closure movement velocity limiting module is made of differential module 41 and closure target location computing module 43, the input of differential module 41 is connected with the output signal end of pedal position measurement 40 in the engine parameter measurement module 10, the output terminal of differential module 41 is connected with the input end of closure target location computing module 43, the output terminal of closure target location computing module 43 and closure current location 47 is connected with the input end of gain-integration-differential control module, and the output terminal of this gain-integration-differential control module is connected with the input end of throttle position control signal output module 15.Pedal position is measured 40 and is measured the foot treadle position, measured value is input to differential module 41, differential module 41 is through differentiating to the foot treadle position, obtain the movement velocity of foot treadle, differential module 41 result of calculations output to closure target location computing module 43, calculate the closure target location and closure current location 47 is subtracted each other controlled amount, this controlled quentity controlled variable is input to by gain module 42, integration module 44, gain-integration-differential pid control module that differential module 48 constitutes, its result of calculation is exported to throttle position control signal output mould and is picked out 15, and control electronic throttle 16 moves to the target location.Limit by 43 pairs of closure movement velocitys of closure target location computing module, the restriction of closure movement velocity in the following way, converting the position of closure to percentage from small to large represents, for example, closure is when closing, with 0% its position of expression, when closure is opened fully, with 100% its position of expression, throttle position is measured 40 by pedal position and is provided, and the foot treadle position signal through differential module 41 differential, is obtained the movement velocity of foot treadle, the movement velocity of setting the closure maximum is 0.5%/ms, and promptly every millisecond is moved 0.5% position.If motion of foot speed is during less than 0.5%/ms, the position that is input to pid control module control electronic throttle according to the position and the difference between the current throttle position of motion of foot then.If motion of foot speed is during greater than 0.5%/ms, then the target location of closure no longer is the position signal of foot treadle, but the target location of calculating closure by the movement velocity and the current location of maximum, so just avoided the too fast movement velocity of closure, the precision of engine fuel supply is improved.
Below in conjunction with software flow pattern shown in Figure 4 method of the present invention is described.At first go on foot the process status of 60 measurement motors, at the status parameter calculation engine working procedure retardation Td of step 62 fuel supply PID regulators 11 according to motor, fuel supply PID regulator 11 reads fuel supply closed loop setting value in the step 61, the input step 64, carry out fuel supply PID control according to the variable feedback, in the step 66, fuel supply PID regulator 11 postpones a period of time Td, then at step 68 controlled quentity controlled variables output control gas nozzle.Calculate pedal travel speed at steps 63 throttle position PID regulator 14, in the step 65, throttle position PID regulator 14 calculates the closure target location according to pedal position and movement velocity, wherein, if pedal travel speed surpasses limit value, then electronic throttle can only be according to the setting speed of maximum, in the step 67, carry out closure PID control according to the deviation of closure target location and current location, then by step 69 output signals control closure.
Claims (3)
1, a kind of heavy Pressure charging thin combustion natural gas engine fuel supply controller, include in order to engine speed to be provided, the engine charge pipe pressure, the lambda sensor parameter measurement, lambda sensor postpones, lambda sensor parameter set point, the engine parameter measurement module of pedal position measurement and closure current location, a fuel supply PID regulator and a throttle position PID regulator, and in order to provide to the fuel supply final controlling element control output signal the fuel supply signal output module and in order to provide to electronic throttle control output signal throttle position control signal output module, it is characterized in that in aforesaid fuel supply PID regulator, also being provided with and be used for sensor transmissions compensation of delay module that controlled quentity controlled variable output is delayed time, in aforesaid throttle position PID regulator, also be provided with closure movement velocity limiting module.
2, by the described heavy Pressure charging thin combustion natural gas engine fuel supply controller of claim 1, it is characterized in that aforesaid fuel supply PID regulator is made up of gain-integration-differential control module and sensor transmissions compensation of delay module, sensor transmissions compensation of delay module includes sensor delay computing module and time delay module, engine speed in the engine parameter measurement module, the output signal end that engine charge pipe pressure and lambda sensor postpone is connected with the input port of sensor delay computing module, the output of sensor delay computing module is connected with time delay module, the input end of time delay module is connected with gain-integration-differential control module output terminal, the lambda sensor parameter measurement in this gain-integration-differential control module input end and the engine parameter measurement module and the output terminal of lambda sensor parameter set point are connected, and the output terminal of time delay module is connected with the input end of fuel supply signal output module.
3, by the described heavy Pressure charging thin combustion natural gas engine fuel supply controller of claim 1, it is characterized in that aforesaid throttle position PID regulator is made up of gain-integration-differential control module and closure movement velocity limiting module, closure movement velocity limiting module is made of differential module and closure target location computing module, the input of differential module is connected with the output signal end of pedal position measurement in the engine parameter measurement module, the output terminal of differential module is connected with the input end of closure target location computing module, the output terminal of closure target location computing module and closure current location is connected with the input end of gain-integration-differential control module, and the output terminal of this gain-integration-differential control module is connected with the input end of throttle position control signal output module.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100782850A CN100516485C (en) | 2007-03-13 | 2007-03-13 | Heavy Pressure charging thin combustion natural gas engine fuel supply controller |
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| CNB2007100782850A CN100516485C (en) | 2007-03-13 | 2007-03-13 | Heavy Pressure charging thin combustion natural gas engine fuel supply controller |
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| CN101021189A CN101021189A (en) | 2007-08-22 |
| CN100516485C true CN100516485C (en) | 2009-07-22 |
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| CN109212959A (en) * | 2017-07-12 | 2019-01-15 | 襄阳达安汽车检测中心 | The parameter setting method that engine emissions testing torque PID is adjusted |
| CN111075583B (en) * | 2019-12-31 | 2022-01-25 | 潍柴动力股份有限公司 | Closed-loop control method and system for natural gas engine rear oxygen sensor |
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Address after: 400039 Chongqing Jiulongpo Chen Ping Tian Cun in No. 101 Patentee after: China Automotive Engineering Research Institute Co.,Ltd. Address before: 400039 Chongqing Jiulongpo Chen Ping Tian Cun in No. 101 Patentee before: China Automotive Engineering Research Institute |
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Address after: 401122 Chongqing district by the North District of Chongqing Jin Avenue, No. 9 Patentee after: China Automotive Engineering Research Institute Co.,Ltd. Address before: 400039 Chongqing Jiulongpo Chen Ping Tian Cun in No. 101 Patentee before: China Automotive Engineering Research Institute Co.,Ltd. |