CN1407321A - Air intake pressure testing method of IC engine - Google Patents
Air intake pressure testing method of IC engine Download PDFInfo
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- CN1407321A CN1407321A CN 02131993 CN02131993A CN1407321A CN 1407321 A CN1407321 A CN 1407321A CN 02131993 CN02131993 CN 02131993 CN 02131993 A CN02131993 A CN 02131993A CN 1407321 A CN1407321 A CN 1407321A
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Abstract
An intake pressure sensor 21 detects the intake pressure affected by the intake pulsation in an intake passage 6 when the engine 3 is operated. An electronic control unit (ECU) 20 calculates a lower limit value of the intake pressure in accompany with the pulsation and an average value of the intake pressure, determines the lower limit value as a detection value of the intake pressure when the lower limit value is smaller than the average value to take the same in various controls of the engine 3. The ECU 20 calculates the air-intake sucked in a combustion chamber 8 on the basis of the value of the intake pressure obtained on the basis of the lower limit value and an engine rotating speed detected by a rotating speed sensor 23, and calculates the fuel injection amount and the ignition timing on the basis of the intake amount. The ECU 20 controls an injector 4, an ignition coil 13 and the like on the basis of the calculated values.
Description
Technical field
The present invention relates to a kind of be used to the detect air intake pressure testing method of the air inlet pressure that is used as the necessary driving parameters of control explosive motor, a kind of air inlet pressure pick-up unit and a kind of control device that is used to control explosive motor of carrying out this air intake pressure testing method that be directly used in.
Background technology
The air inlet of explosive motor presses and is used as the various controls that are used for explosive motor, such as one of them of all driving parameters of propellant spray control, the control duration of ignition and exhaust gas recirculatioon control etc.For example, in the engine of a kind of so-called D-J system (being a kind of being used for to measure the air inlet pressure of inlet channel) to carry out the system of propellant spray, the interior air capacity of burning chamber that is drawn into engine is to calculate on the basis of air inlet pressure and engine speed, thereby determines to want the fuel quantity of spray on the basis of the air inflow of calculating thus.Yet, the pulsation of the air inlet that generation is associated with the reciprocating of piston in a kind of reciprocating engine, thus cause that the air inlet pressure changes or pulsation.Therefore, the value of being pressed by the measured air inlet of air inlet pressure sensor can not be used as driving parameters, and this is because it may cause the instability control of explosive motor.
In order to address the above problem, imagined multiple technology or the method that air inlet is pressed that be used to detect, the influence that wherein can remove charge pulsation is for use in the control explosive motor.
What can expect usually is, makes the detected value of air inlet pressure sensor be subjected to making the variation of pressing because of the caused air inlet of charge pulsation become stably " average (steadily) processing ".Should " average treatment " be meant all detected value equalizations of being taken a sample at interval with preset time.Average rate can be defined as " mean coefficient " with being considered to.
In addition, disclosed an example of similar technique in the Japanese patent unexamined publication number 01 (1989)-318938.The device that is used for measuring the pressure in the draft tube that in the disclosure thing, is disclosed, the detected value that the air inlet that is detected by the air inlet pressure sensor is pressed is to take a sample in the driving period of each appointment, the detected value of the air inlet pressure that is obtained by taking a sample thus is subjected to algorithm process, so that calculating mean value.At the transition run duration of explosive motor, this mean value is used as the calculated value of the air inlet pressure that is used for the control of propellant spray amount.On the other hand, during the conventional operation of engine, by further equalization, and be used as the calculated value that the air inlet that is used for the control of propellant spray amount is pressed by the mean value that this equalization obtained by mean value that algorithm process obtained.More particularly, in this type of measurement mechanism,, be used as the atmospheric pressure value that advances that is used for the control of propellant spray amount for the calculated value detected value of air inlet sensor, that obtained by " average treatment " at the transition run duration.During conventional operation, be used as the atmospheric pressure value that advances that is used for the control of propellant spray amount for the calculated value detected value of air inlet sensor, that obtained by " quadratic average processing ".
Yet in the measuring method that adopts traditional general average treatment, when mean coefficient was set at a bigger value, the calculated value that air inlet is pressed tended to become stable during conventional operation, but can cause operating lag at the transition run duration.On the contrary, when mean coefficient was set at a less value, even can improve the operating lag problem of transition run duration, it is unstable that the calculated value that air inlet is pressed also tends to become.
On the other hand, in the measurement mechanism in traditional publication, the calculated value that air inlet is pressed is stable (as shown in figure 14) during conventional operation, and compares with average treatment commonly used, can also improve the response of transition run duration.Yet the precision in the calculated value is not enough to be associated with the actual air capacity that will be drawn in the burning chamber.In the relation of calculated value that air inlet is pressed and the load on the explosive motor, can not provide linear characteristic.
At this moment, applicant of the present invention finds, move in circles in the formula engine a kind of four, the lower limit that air inlet is pressed, promptly by the caused air inlet of charge pulsation press change in the suction stroke near the detected value the bottom dead centre be the atmospheric pressure value that advances that fullest ground reflects actual air inflow.The applicant considers detected value is used as the calculated value that the air inlet that is used to control explosive motor is pressed thus, and has imagined a kind of air intake pressure testing method of explosive motor in Japanese patent application No. 2000-293439.In this method, run duration at explosive motor, as shown in figure 15, the lower limit pmlo of A/D conversion value (hereinafter being referred to as " AD the value ") pmad that presses along with the air inlet of pulsatile change is calculated and is defined as final air inlet presses PM, and it is the calculated value of air inlet pressure that PM is pressed in this final air inlet.
After the method for the further research institute of the applicant imagination, find, when engine is in operation the generation blowback, this can cause the waveform fluctuation (shown in time t1 and t2 among Figure 15) of AD value pmad, because of unconventional lower limit that fluctuation is brought may be surveyed the lower limit pmlo that presses for the air inlet of pulsation by mistake.When this mistake of generation was surveyed, the air inflow of engine was calculated as a value greater than actual amount.Because the fuel quantity of the spray of wanting that calculates is excessive, cause the air-fuel ratio of high-quality thus.So just may cause the fault such as driveability and heat radiation deterioration.
Summary of the invention
In view of the foregoing developed the present invention, one object of the present invention is to overcome the problems referred to above, and provide a kind of air intake pressure testing method of explosive motor, can obtain splendid stability and response by this, and can detect with the air inlet of the mutual tight association of actual air inflow and press, and can prevent to survey because of the mistake of the blowback of engine etc.
Other purpose of the present invention and advantage are enumerated a part in description subsequently, and a part will come into plain view from this is described, and perhaps can obtain by enforcement of the present invention.Objects and advantages of the present invention can be familiar with and be obtained by means of specifically noting in accessory claim and combination.
In order to realize purpose of the present invention, a kind of air intake pressure testing method of explosive motor is provided, its characteristics are, comprise the following steps: to calculate the lower limit that the air inlet of the run duration pulsation of explosive motor is pressed; Calculate the mean value of the air inlet pressure of pulsation together with this lower limit; And, this lower limit is defined as the calculated value that air inlet is pressed when lower limit during less than mean value.
At the run duration of explosive motor, charge pulsation takes place, therefore, air inlet is pressed and is accompanied by pulsation.Be used to control engine because air inlet is pressed, thereby the instability that will cause in the control is pressed in this air inlet.Thus, the applicant finds that the lower limit in the detected value that the air inlet of pulsation is pressed is the atmospheric pressure value that advances that most accurately reflects actual air inflow.
According to said structure, the calculated value that air inlet is pressed is calculated and be defined as to the lower limit that the air inlet of pulsation is pressed.As a result, can obtain to be mutually related suitable value that air inlet presses and situation of change with air inflow and to ignore the air inlet that is accompanied by pulsation and press.
In addition, when lower limit during less than the mean value calculated together with lower limit, this lower limit is confirmed as the calculated value that air inlet is pressed.Even the waveform that the air inlet of pulsation is pressed produces unconventional lower limit owing to fluctuation takes place the blowback in the explosive motor, in this unconventional lower limit does not include again yet, and can prevent to be confirmed as the calculated value that air inlet is pressed.
To achieve these goals, the characteristics of the present invention that disclosed in the claim 2 are, in air intake pressure testing method as claimed in claim 1, the calculating of mean value is all value equalizations that the air inlet of the pulsation of will take a sample at interval with preset time is pressed, comprise with different mean coefficients and calculate a plurality of mean values simultaneously, so that from the mean value of calculating, select to be applicable to the mean value of making comparisons with lower limit according to the running status of explosive motor.
According to said structure, change the mean value that the mean coefficient that is used for mean value calculation can provide different amplitude sizes.Therefore, can select to be applicable to the mean value of making comparisons according to the running status of explosive motor with lower limit, so that the characteristic of pressing according to the air inlet of the pulsation of depending on running status does not include unconventional lower limit interior, be confirmed as the calculated value that air inlet is pressed so that prevent this unconventional lower limit.
To achieve these goals, pick-up unit is pressed in the air inlet that the present invention relates to a kind of explosive motor that is disclosed in the claim 3, and its characteristics are, comprising: be used to detect the air inlet that the air inlet of explosive motor presses and press detection means; The lower limit that is used for calculating the lower limit that the air inlet of the run duration pulsation of explosive motor presses on the basis of the resulting detected value of detection means is pressed in air inlet is calculated means; Be used on the basis of the resulting detected value of detection means is pressed in air inlet, calculating the mean value calculation means of the mean value that the air inlet of the run duration pulsation of explosive motor presses; And be used for pressing and determine means when the air inlet that lower limit is defined as lower limit during less than mean value the calculated value that air inlet presses.
According to said structure, to press on the basis of the resulting detected value of detection means in the air inlet of the run duration of explosive motor, lower limit calculating means are calculated the lower limit that the air inlet of pulsation is pressed, and the mean value calculation means are calculated the mean value that the air inlet of pulsation is pressed.When lower limit during less than mean value, lower limit is confirmed as pressing the calculated value of determining that the determined air inlet of means is pressed by air inlet.Suitable value that the air inlet relevant with air inflow press and situation of change so just can be provided and ignore the air inlet that is accompanied by pulsation and press.
Even the waveform that the air inlet of pulsation is pressed produces unconventional lower limit owing to fluctuation takes place the blowback in the explosive motor, in this unconventional lower limit does not include again yet, and can prevent to be confirmed as the calculated value that air inlet is pressed.
To achieve these goals, the characteristics of the present invention that disclosed in the claim 4 are, press in the pick-up unit in air inlet as claimed in claim 3, all value equalizations that the air inlet of the pulsation that the mean value calculation means will be taken a sample at interval with preset time is pressed are so that calculate a plurality of mean values with different mean coefficients; And device also comprises the mean value selection approach that is used for being applicable in a plurality of mean values selections of calculating according to the running status of explosive motor the mean value of making comparisons with lower limit.
According to said structure, change the mean coefficient that is used for mean value calculation, therefore can obtain the mean value of different amplitude sizes.Therefore, can select to be applicable to the mean value of making comparisons by the mean value selection approach according to the running status of explosive motor with lower limit, so that according to the characteristic of the intake pressure difference of the pulsation of depending on running status with unconventional lower limit not very interior be confirmed as the calculated value that air inlet is pressed so that prevent this unconventional lower limit.
To achieve these goals, the control device of the control main body that the present invention relates to a kind of operation that is used to control relevant explosive motor that is disclosed in the claim 5, its characteristics are, comprising: the rotating speed detection means that is used to detect the rotating speed of explosive motor; Be used to detect the air inlet that the air inlet of explosive motor presses and press detection means; The lower limit that is used for calculating the lower limit that the air inlet of the run duration pulsation of explosive motor presses on the basis of the resulting detected value of detection means is pressed in air inlet is calculated means; Be used on the basis of the resulting detected value of detection means is pressed in air inlet, calculating the mean value calculation means of the mean value that the air inlet of the run duration pulsation of explosive motor presses; Be used for pressing and determine means when the air inlet that lower limit is defined as lower limit during less than mean value the calculated value that air inlet presses; The operational ton that is used for calculating on basis that press to be determined calculated value that the determined air inlet of means is pressed and the resulting rotating speed detected value of rotating speed detection means by air inlet for the operational ton that obtains required controlled quentity controlled variable calculates means; And the control device that is used on the basis of the controlled quentity controlled variable that the means of being calculated by controlled quentity controlled variable are calculated, controlling controlled quentity controlled variable by control control main body.
According to said structure, the rotating speed of run duration explosive motor is detected by the rotating speed detection means.The air inlet of run duration is pressed by air inlet and is pressed detection means to detect, and on the basis of detected value, the lower limit that the air inlet of lower limit calculating means calculating pulsation is pressed, and the mean value calculation means are calculated the mean value of the air inlet pressure of pulsation.In addition, when lower limit during less than mean value, lower limit is confirmed as the calculated value that air inlet is pressed.On the basis of the detected value of calculated value that determined air inlet is pressed and rotating speed, operational ton calculating means are calculated the operational ton that is used to obtain required controlled quentity controlled variable.Control device is controlled main body on the basis of this operational ton, so that the control controlled quentity controlled variable.Therefore, the caused unconventional lower limit of fluctuation of pressing because of the air inlet of pulsation does not include interior, and can prevent to be confirmed as the calculated value that air inlet is pressed, so that in the control of control main body, have only the suitable lower limit of the air inlet pressure of pulsation just to be got the calculated value of pressing as air inlet.Even air inlet is pressed and is included pulsation like this, can prevent that also controlled quentity controlled variable from becoming unstable, and can be according to the suitably control main body of situation of change of air inlet pressure.
Description of drawings
The accompanying drawing that is included in the instructions and constitutes this instructions part shows a kind of embodiment of the present invention, and is used from explanation purpose of the present invention, advantage and principle together with describing one.
In these accompanying drawings:
Fig. 1 is the structural representation of the engine system of an embodiment of the present invention;
Fig. 2 shows the process flow diagram that the program that detects control is pressed in air inlet;
Fig. 3 shows the AD value of the moving air inlet pressure of dai channel and the key drawing of mean value thereof;
Fig. 4 shows the key drawing of moving air inlet pressure of dai channel and AD value thereof etc.;
Fig. 5 is the process flow diagram of propellant spray control program;
Fig. 6 is the process flow diagram of the control program duration of ignition;
Fig. 7 (a) and 7 (b) show the time diagram of the situation of change of pressing with respect to the air inlet of the variation in the throttle valve opening;
Fig. 8 is the chart with respect to the estimated performance of the air inlet pressure of engine load;
Fig. 9 shows the time diagram of the situation of change of AD value that during engine conventional operation air inlet presses and 1/32 mean value thereof;
Figure 10 (a) and 10 (b) show the time diagram in the situation of change of the AD value of engine start run duration engine speed, air inlet pressure and 1/32 and 1/128 mean value thereof;
Figure 11 (a) and 11 (b) show the time diagram in the situation of change of the AD value of engine transition run duration transition marker for determination, air inlet pressure and 1/4 and 1/32 mean value thereof;
Figure 12 (a)-12 (c) shows the time diagram in the situation of change of engine transition run duration air inlet pressure, air-fuel ratio and engine speed;
Figure 13 (a)-13 (c) shows the time diagram in the situation of change of engine transition run duration air inlet pressure, air-fuel ratio and engine speed;
Figure 14 shows the time diagram of the situation of change of detected value that air inlet in the prior art presses and calculated value; And
Figure 15 shows the time diagram of a kind of air intake pressure testing method in the prior art.
Embodiment
Describing air intake pressure testing method that makes the explosive motor that the present invention specializes and the air inlet of adopting this detection method below with reference to accompanying drawings in detail presses pick-up unit and adopts this air inlet to press a preferred embodiment of the control module of pick-up unit.
Fig. 1 is the structural representation of the engine system in the present embodiment.This engine system is installed in the vehicle, and is provided with the fuel tank 1 of fuel-in-storage.The inside of this fuel tank 1 is provided with the petrolift 2 that is used for exporting the fuel that is stored in fuel tank 1.A kind of reciprocating type single-barrel engine 3 that is explosive motor is provided with propellant spray valve 4 or ejector filler.The fuel of being exported by pump 2 is supplied to ejector filler 4 by fuel channel 5.When ejector filler 4 runnings, this fuel of supplying with is injected in the inlet channel 6.Air is drawn into the inlet channel 6 through air purifier 7 from the outside.Be drawn into the air in the passage 6 and form a kind of flammable fuel-air mixture that will be drawn in the burning chamber 8 by the fuel of 4 sprays of ejector filler.
In inlet channel 6, be equipped with a throttling valve 9.This throttling valve 9 is operated by predetermined accelerator (not shown).This throttling valve open/close control is inhaled into the air (air inlet) in the burning chamber 8 from inlet channel 6 amount.One bypass channel 10 is walked around throttling valve 9 and is arranged in the inlet channel 6.In this bypass channel 10, be equipped with an idle speed operation valve (isc valve) 11.This isc valve 11 is used to be controlled at the idle speed of engine 3 during throttling valve 9 buttoned-up status.
The spark plug 12 that is arranged in the burning chamber 8 forms spark in the ignition signal that receives 13 outputs of spontaneous ignition coil.Member 12 and 13 together is configured for lighting the portfire of the flammable fuel-air mixture that is supplied to burning chamber 8.When spark plug 12 sent spark, the fuel-air mixture that is inhaled in the burning chamber 8 detonated and burns.Exhaust after the burning is discharged into the outside by an exhaust passage 14 from burning chamber 8.The inside of this exhaust passage 14 is provided with the threeway catalyst 15 that is used for the catalytic purification exhaust.Be accompanied by the burning of the flammable fuel-air mixture in the burning chamber 8, cause piston 16 runnings, so that be connected bent axle 17 rotations on this piston 16.So engine 3 produces the driving force that is used to make vehicle '.
Vehicle is provided with the electronic control unit (ECU) 20 of the various operations of be used to pilot engine 3 ignition switch 18 and control engine 3.The accumulator 19 that is used as vehicle power supply is connected to ECU20 through ignition switch 18.When switch 18 was connected, ECU20 was supplied to the electric power from accumulator 19.
Engine 3 also is provided with the various sensors 21,22,23 and 24 that are used to detect the various driving parameters relevant with the running status of engine 3.Those sensors are connected to ECU20 individually.More particularly, be used as air inlet press detection means, be arranged on the air inlet that an air inlet pressure sensor 21 in the inlet channel 6 detects the passage 6 in the downstream that is positioned at throttling valve 9 and press pm, so that export one and the corresponding electric signal of its detected value.Place a cooling-water temperature sensor 22 of engine 3 to detect the temperature T H (coolant water temperature) of the chilled water that flows through engine 3, so as to export one with the corresponding electric signal of its detected value.Be used as a speed probe 23 rotating speed detection means, that be arranged in the engine 3 and detect the rotational speed N E (engine speed) of bent axles 17, so as to export one with the corresponding electric signal of its detected value.Place an oxygen sensor 24 of exhaust passage 14 to detect the oxygen O that is discharged into the exhaust in the exhaust passage 14
xConcentration (output voltage) so that export one with the corresponding electric signal of its detected value.This oxygen sensor 24 is used to obtain to be supplied to the air-fuel ratio A/F of flammable fuel-air mixture of the burning chamber 8 of engine 3.
In the present embodiment, ECU20 is received from the various signals of the sensor 21-24 output.Respond those signals, ECU20 control petrolift 2, ejector filler 4, isc valve 11, ignition coil 13 etc. are pressed detection control, propellant spray control, the control duration of ignition and other multinomial control so that carry out air inlet.In the present embodiment, ECU20 constitutes lower limit calculating means of the present invention, mean value calculation means, the definite means of air inlet pressure, mean value selection approach, controlled quentity controlled variable calculating means and control device.
In the present embodiment, air inlet press to detect the control that control is meant the calculated value that the air inlet that is used for obtaining having removed the influence of charge pulsation on the basis of being pressed pm by sensor 21 measured air inlets is pressed.Propellant spray control is meant that the running status of responding engine 3 controls propellant spray amount and the time from ejector filler 4.Duration of ignition control is meant that the running status of responding engine 3 comes control ignition coil 13, controls the duration of ignition of spark plug 12 thus.
As everyone knows, ECU20 is made up of CPU (central processing unit) (CPU), ROM (read-only memory) (ROM), random-access memory (ram), reserve RAM, outside input circuit, outside output circuit etc.ECU20 constitutes a logic operation circuit, and wherein CPU, ROM, RAM and reserve RAM are connected to outside input circuit and outside output circuit respectively by a bus.ROM is the storage predetermined control program relevant with the control of engine 3 in advance.RAM stores the result of calculation of CPU temporarily.The data of storage before reserve RAM is used for.CPU from the basis of sensor 21-24 by the detection signal of input circuit input, under the predetermined control program, carry out above-mentioned various control.
To be presented in below by the air inlet in the performed various controls of ECU20 and press the processing details that detects control.Fig. 2 shows air inlet and presses the process flow diagram that detects control program.ECU20 is with the predetermined time interval routine shown in the execution graph 2 periodically.In the present embodiment, this routine was carried out with the time interval of 1ms.
At first, in step 100, ECU20 reads current A/D conversion value (hereinafter being referred to as " AD the value ") pmad that is pressed pm by the 21 measured air inlets of air inlet pressure sensor.
In step 101, ECU20 calculates 1/4 mean value pmsm4 by following formula (1):
pmsm4＝(3/4)pmsm4o+(1/4)pmad…(1)
In the formula, " pmsm4o " is meant 1/4 last mean value pmsm4.The equalization of the AD value pmad of the each sampling of this formula (1) expression is handled.
In step 102, ECU20 calculates 1/32 mean value pmsm32 by following formula (2):
pmsm32＝(31/32)pmsm32o+(1/32)pmad…(2)
In the formula, " pmsm32o " is meant 1/32 last mean value pmsm32.The equalization of the AD value pmad of the each sampling of this formula (2) expression is handled.
In step 103, ECU20 calculates 1/128 mean value pmsm128 by following formula (3):
pmsm128＝(127/128)pmsm128o+(1/128)pmad…(3)
In the formula, " pmsm128o " is meant 1/128 last mean value pmsm128.The equalization of the AD value pmad of the each sampling of this formula (3) expression is handled.
Subsequently, in step 104, ECU20 judges that current AD value pmad is whether greater than the AD value pmado of last (before).If judged result is sure, think that then air inlet pressure pm has risen.In step 105, ECU20 will represent that the mark XPMUP that current pressure rises is set at " 1 ".If the judged result in the step 104 is to negate, then ECU20 judges that in step 120 whether this current AD value pmad is less than last AD value pmado.When this judged result negated, ECU20 judged that air inlet pressure pm is constant, and makes the setting of current pressure rising mark XPMUP the same with last setting.Treatment scheme advances to step 116.On the contrary, when the judged result in the step 120 was affirmed, ECU20 judged that air inlet pressure pm descends, and in step 121, current pressure rising mark XPMUP is set at " 0 ", and makes flow process advance to step 116.
In step 105 step 106 subsequently, ECU20 judges whether last pressure rising mark XPMUPO is " 0 ".If judged result is the words (the expression air inlet presses pm to continue to rise from last judgement time) of negating, then ECU20 makes flow process advance to step 116.If judged result is sure, then ECU20 judge air inlet press pm from the decline state exchange to the rising state, and the time flow process advance to step 107.
In step 107, ECU20 judges whether starting marker for determination XSIDOU is " 0 ".This starting marker for determination XSIDOU was set to " 1 " at 3 o'clock piloting engine with bent axle, then had been set to " 0 " At All Other Times.In the present embodiment, when the value by the measured engine speed NE of speed probe 23 was lower than predetermined value (for example 1150rpm), ECU20 judged that this engine 3 is in the starting.If the judged result in the step 107 is the words (expression engine 3 is in the starting) of negating, then ECU20 presses air inlet the 1/128 mean value pmsm128 of the AD value pmad of pm to be set at protection value pmsm in step 112, and makes flow process advance to step 113.
On the other hand, if the judged result in the step 107 is sure, then ECU20 judges that engine 3 is not in the starting, judges in step 108 thus whether transition marker for determination XKATO is " 1 ".This transition marker for determination XKATO moves, is set to " 1 " when promptly quickening operation in the transition of engine 3, then is being set to " 0 " At All Other Times.If the judged result in the step 108 is the words (it is in service that expression engine 3 is not in transition) of negating; then ECU20 presses air inlet the 1/32 mean value pmsm32 of the AD value pmad of pm to be set at protection value pmsm in step 111, and makes flow process advance to step 113.
If the judged result in the step 108 is sure words, then to judge that engine 3 is in transition in service for ECU20, judges in step 109 that thus whether crank shaft angle from TKATO transit time (transition this moment marker for determination XKATO is set to " 1 ") is less than 1440 °.If judged result is sure words (expression transition operation is not converted to conventional operation as yet), then ECU20 presses air inlet the 1/4 mean value pmsm4 of the AD value pmad of pm to be set at protection value pmsm in step 110, and makes flow process advance to step 113.If the judged result in the step 109 is the words (expression transition operation has been converted to conventional operation) of negating, then ECU20 is set at protection value pmsm with 1/32 mean value pmsm32 in step 111, and makes flow process advance to step 113.
In step 110,111 or 112 step 113 subsequently, ECU20 judges that whether the last AD value of the pressure of the air inlet from the decline state exchange to the state that rises pm is less than protection value pmsm.If this judged result is to negate, then ECU20 makes flow process directly advance to step 116.On the other hand, if be sure, then ECU20 is set at the lower limit pmlo that pm is pressed in air inlet in step 114 with last AD value pmado.More particularly, ECU20 calculates the lower limit pmlo of the trough that is present in pulsating waveform among a plurality of AD value pmad that press pm to obtain continuously from the air inlet of pulsation.
In step 115, ECU20 is set at the final calculated value PM that PM is pressed in air inlet with the current lower limit pmlo that obtains.
Then, in step 120,121,106,113 or 115 step 116 subsequently, ECU20 is set at last AD value pmado with current AD value pmad.
In step 117, ECU20 judges whether current pressure rising mark XPMUP is " 1 ".If judged result is sure, then ECU20 is set at " 1 " with last rising marker for determination XPMUPO in step 118.Perhaps, if be to negate, then ECU20 is set at " 0 " with last rising marker for determination XPMUPO in step 119.
The processing that ECU20 finishes this routine temporarily when next computation period till, and in step 100 and step subsequently, restart to handle.
Fig. 3 be the part show air inlet press air inlet in the pulsation press pm AD value pmad situation of change and in step 117,118 and 119, calculate respectively on the basis of AD value pmad each mean value pmsm4, pmsm32 and the time diagram of the situation of change of pmsm128.Can see that from this time diagram the absolute value of each mean value pmsm4, pmsm32 and pmsm128 is less than the absolute value of basic AD value pmad.Can find that the peak lag of the absolute value of each mean value pmsm4, pmsm32 and pmsm128 is in the peak value of basic AD value pmad.
In above-mentioned routine, run duration at engine 3 calculates the lower limit pmlo that the pulsation of pm is pressed in air inlet, and the lower limit pmlo that calculates is defined as final air inlet presses PM, the calculated value of pm is pressed in the air inlet that this final air inlet presses PM system to be used for the control of engine 3.Therefore, as shown in Figure 4, press pm about the air inlet of pulsation, last AD value pmado and current AD value pmad are sampled and make comparisons, and are used to judge decline or the rising of air inlet pressure pm, are converted to rising but also be used for judgement from decline.Last AD value pmado is calculated as lower limit pmlo when being converted to rising from decline, and this lower limit pmlo is confirmed as the value that PM is pressed in final air inlet.
In above-mentioned routine, as lower limit pmlo during less than each mean value pmsm4, pmsm32 and pmsm128, this lower limit pmlo is confirmed as final air inlet and presses PM, and it is the calculated value that pm is pressed in air inlet that PM is pressed in this final air inlet.Therefore, as shown in Figure 3, if unconventional lower limit appears among the AD value pmad of time t1, then when this unconventional lower limit during greater than 1/32 mean value pmsm32 or 1/128 mean value pmsm128, this unconventional lower limit is not very in the setting of lower limit pmlo.Therefore, can prevent that this unconventional lower limit is set to final air inlet and presses PM.
In the engine system of present embodiment, adopt as above measured final air inlet to press PM to carry out propellant spray control.The processing details of propellant spray control will be described below.Fig. 5 is the process flow diagram of propellant spray control program.ECU20 is with the predetermined time interval routine shown in the execution graph 5 periodically.
At first, in step 200, ECU20 reads the value of engine speed NE on the basis by speed probe 23 detected values.
In step 210, ECU20 reads the value that PM is pressed in final air inlet, and the air inlet that is about to pulsation presses the lower limit pmlo of pm to press PM as final air inlet.
In step 220, ECU20 calculates basic propellant spray amount TAUBSE on the basis of the value of engine speed NE that has been read into and air inlet pressure PM.ECU20 calculates basic propellant spray amount TAUBSE with reference to intended function data (spray spirogram).In this performance data, the burning chamber 8 interior air inflows that are inhaled into engine 3 are to determine on the basis of the value of air inlet pressure PM and engine speed NE, and basic propellant spray amount TAUBSE decides accordingly with the air inflow that is determined.
In step 230, ECU20 is in the value of reading coolant water temperature THW from the basis of cooling-water temperature sensor 22 resulting detected values.In step 240, ECU20 calculates the idle running correction factor KTHW that will be used for revising according to the idling conditions of engine 3 basic propellant spray amount TAUBSE.
In step 250, ECU20 reads the air-fuel ratio correction factor FAF of the air-fuel ratio A/F that is used to revise the flammable fuel-air mixture that will be supplied to burning chamber 8.This air-fuel ratio correction factor FAF is the oxygen density value O that is read from oxygen sensor 24 resulting detected values
xThe basis on calculate.
In step 260, ECU20 is on the basis of idle running correction factor KTHW and air-fuel ratio correction factor FAF etc., by revising the value that the above-mentioned basic propellant spray amount TAUBSE that calculates calculates final fuel spray amount TAU.
After this, in step 270, ECU20 controls ejector filler 4 on the basis of the value of the final fuel spray amount TAU that calculates thus, thereby control is from the fuel quantity of ejector filler 4 sprays.
In the engine system of present embodiment, adopt as above measured final air inlet to press PM to carry out the control duration of ignition.Therefore, will introduce the processing details of this control duration of ignition below.Fig. 6 is the process flow diagram of the control program duration of ignition.ECU20 periodically carries out this routine with predetermined time interval.
At first, in step 300, ECU20 reads the value of engine speed NE on the basis by speed probe 23 resulting detected values.
In step 310, ECU20 reads the value that PM is pressed in final air inlet, and the air inlet that is about to pulsation presses the lower limit pmlo of pm to press PM as final air inlet.
In step 320, ECU20 calculates basic ignition time ITBSE on the basis of the value of engine speed NE that has been read into and air inlet pressure PM.ECU20 calculates basic ignition time ITBSE with reference to intended function data (the figure duration of ignition).In this performance data, the burning chamber 8 interior air inflows that are inhaled into engine 3 are to determine on the basis of the value of air inlet pressure PM and engine speed NE, and basic ignition time ITBSE decides accordingly with the air inflow that is determined.
In step 330, ECU20 reads the value of coolant water temperature THW on the basis by cooling-water temperature sensor 22 resulting detected values.In step 340, on the basis of the coolant water temperature THW that is read, ECU20 calculates and is used for revising the regularly idle running correction factor K1 of ITBSE of basic ignition according to the idling conditions of engine 3.
In step 350, ECU20 is on the basis of idle running correction factor K1 etc., by revising the value that the above-mentioned basic ignition time ITBSE that calculates calculates final duration of ignition of IT.
After this, in step 360, ECU20 as above calculate final duration of ignition IT the basis on control ignition coil 13 so that the duration of ignition of control spark plug 12.
As mentioned above, in the engine system of present embodiment, air inlet is pulsed in inlet channel 6 at the run duration of engine 3, presses pm also just to be accompanied by pulsation by the 21 measured air inlets of air inlet pressure sensor like this.As a result, when the air inlet of pulsation pressed pm to be used as one of them driving parameters of the various controls that are used for engine 3, these controls will be unstable.
Applicant of the present invention finds thus, presses lower limit pmlo in a plurality of values of pn most accurately to reflect the actual atmospheric pressure value that advances that is drawn into air capacity in the burning chamber 8 in the air inlet of measured pulsation.Therefore, in the air intake pressure testing method of carrying out in this engine system, the air inlet of pulsation is pressed the lower limit pmlo of pm (pulsation is pressed in air inlet) to be set at final air inlet by calculating and is pressed PM.So just can provide the final air inlet with suitable value press PM and with the air inflow situation of change that is mutually related, and pm is pressed in the air inlet of ignoring pulsation.Therefore, can and detect air inlet with the high correlation of actual air inflow and press PM with splendid stability and response.
Fig. 7 (a) and 7 (b) are the time diagrams about the situation of change of the air inlet pressure of the variation in the throttle valve opening.In Fig. 7 (a), dotted line is represented the AD value pmad of air inlet pressure pm; PM is pressed in the final air inlet that solid line is represented to be obtained from performed in the present embodiment detection; Double dot dash line represents that then handling the average air inlet that is obtained by traditional equalization presses.
From this figure, can be clear that, air inlet press PM before quickening beginning with end of boost after two periods in to combine with the situation of change of constant throttle valve opening be stable.At the transition run duration from the acceleration beginning to termination, PM progressively rising is rapidly pressed in air inlet.This is compared with the situation of change of being pressed by the traditional average air inlet shown in the double dot dash line, air inlet in the present embodiment presses the time t1 place of PM behind end of boost to become basicly stable, and traditional average air inlet has just just begun to stablize at time t2 place after being pressed in one section quite long delay.Therefore, according to the air intake pressure testing method in the present embodiment, PM is pressed in the air inlet that can detect the response that mistiming of having between time t1 and t2 improves.
Fig. 8 shows the chart of the estimated performance of pressing about the air inlet of engine load.Can find that from this chart along with the load on the engine increases, traditional average air inlet is pressed and will be risen along curve, then straight line rising of PM is pressed in the air inlet in the present embodiment.In other words, appreciable is that the air inlet in the present embodiment presses PM to have linearity with respect to engine load.This just represents the motion of air inlet pressure PM linear response by the caused throttling valve 9 of accelerator, and this will improve the response of pressing PM in the measured air inlet of transition run duration.Therefore, can obtain from air inlet press PM to convert and the air inflow of coming as than press the air inflow that converts and come value more accurately from traditional average air inlet.
At this moment, in the engine 3 of present embodiment, if be in operation the generation blowback, then the air inlet in inlet channel 6 presses the waveform of pulsation to fluctuate, and this will cause unconventional lower limit occurring in the lower limit that the air inlet of pulsation is pressed.
On the other hand, in the present embodiment, various types of mean value pmsm4, the pmsm32 of the AD value pmad that calculates and pmsm128 press the lower limit of the AD value pmad of pm to be used as protection value pmsm together with the air inlet of pulsation.When being the AD value pmad of the lower limit in the calculating during less than above-mentioned protection value pmsm, this AD value pmad is confirmed as final air inlet and presses PM, and it is the calculated value that pm is pressed in air inlet that this final air inlet is pressed.Therefore, even because the air inlet of pulsation presses pm to cause the waveform fluctuation unconventional lower limit to occur because of the blowback in the engine 3 for example, this unconventional lower limit is also not very within lower limit normally.So just can prevent that this unconventional lower limit is confirmed as final air inlet and presses PM.Even when the air inlet of pulsation presses pm to fluctuate because of the blowback in the engine 3, also can prevent to press the mistake of PM to survey to final air inlet.
Therefore, in the present embodiment,, mean value pmsm4, pmsm32 and pmsm128 selected for use be protection value pmsm according to the running status of engine 3.
More particularly, during the conventional operation of engine 3,1/32 mean value pmsm32 is used as protection value pmsm.If the AD value pmad that is the lower limit in the calculating is less than above-mentioned protection value pmsm, then this AD value pmad is confirmed as final air inlet and presses PM.
For example, during the lost motion operation in conventional operation, variation such as the solid line among Fig. 9 of the AD value pmad of the air inlet of pulsation pressure pm are represented.1/32 mean value such as the double dot dash line among Fig. 9 of AD value pmad are represented.If the waveform of AD value pmad fluctuates, then its lower limit pmlo normally is defined as pressing PM by the represented final air inlet of the fine rule among Fig. 9.Even when the waveform of AD value pmad because of for example blowback is fluctuateed, and therefore in time t1 and the t2 place unconventional lower limit of appearance when (as shown in Figure 9), lower limit is also still greater than the 1/32 mean value pmsm32 that is protection value pmsm.So just can prevent that unconventional lower limit from being surveyed by mistake is that PM is pressed in final air inlet.
In the present embodiment, obtain the final air inlet pressure PM that normally records in propellant spray control with in controlling the duration of ignition, so that can calculate normal air inflow.Can suitably carry out and corresponding to propellant spray control of conventional operation and the control duration of ignition.Therefore, engine 3 can be carried out the running of stable routine and can not be subjected to influence by caused fluctuations such as blowbacks.
At engine 3 during starts, 1/128 mean value pmsm128 is used as protection value pmsm, and the AD value pmad of the lower limit in calculating with box lunch system is during less than protection value pmsm, and this AD value pmad is confirmed as final air inlet pressure PM.
For example, begin until in the period of free-runing operation in 3 the operation of piloting engine with bent axle, the variation of the AD value pmad of the air inlet pressure pm of pulsation is shown in the solid line among Figure 10, and therefore, the variation of the 1/128 mean value pmsm128 of AD value pmad is shown in the double dot dash line among Figure 10.Be that reason that 1/128 mean value pmsm128 rather than 1/32 mean value pmsm32 are used as the protection value pmsm in when starting is to press PM in order to prevent that unconventional lower limit from being surveyed to final air inlet by mistake.The amplitude of 1/32 mean value pmsm32 is greater than the amplitude of 1/128 mean value pmsm128.The protection value pmsm when if this 1/32 mean value pmsm32 is used as engine start; then should protection value pmsm greater than the unconventional lower limit (time t1 place as shown in figure 10) that occurs because of blowback etc., press PM so this lower limit can be surveyed to final air inlet by mistake.Therefore, its amplitude is used as protection value pmsm less than the 1/128 mean value pmsm128 of 1/32 mean value pmsm32, is that PM is pressed in final air inlet so that prevent from unconventional lower limit mistake is surveyed.In the present embodiment; when engine speed NE is a predetermined value (for example 1150rpm) or when following; 1/128 mean value pmsm128 is used as protection value pmsm, and when engine speed NE surpassed this predetermined value (for example 1150rpm), 1/32 mean value pmsm32 was used as protection value pmsm.
In the present embodiment, in propellant spray control with obtain the final air inlet that normally records the duration of ignition in the control and press PM, so that can suitably carry out and start corresponding to those controls.As a result, engine 3 can stable status start, and can not be subjected to the influence because of caused fluctuations such as blowbacks.
On the other hand, at the transition run duration of engine 3,1/4 mean value pmsm4 is used as protection value pmsm, and the AD value pmad of the lower limit in calculating with box lunch system is during less than this protection value pmsm, and AD value pmad is confirmed as final air inlet pressure PM.In the transition period that conventional state quickens, the variation of the AD value pmad of the air inlet of pulsation pressure pm is shown in the solid line among Figure 11, and the variation of the 1/4 mean value pmsm4 of this AD value pmad is shown in the double dot dash line among Figure 11 at engine 3.It is the situation of change that situation of change that reason that 1/4 mean value pmsm4 rather than 1/32 mean value pmsm32 are used as protection value pmsm is considered to 1/32 mean value pmsm32 may lag behind the AD value pmad shown in the line of the single-point among Figure 11.Compare with 1/32 mean value pmsm32, adopt 1/4 mean value pmsm4 to provide and press the suitable lower limit pmlo of PM being confirmed as final air inlet.In the engine 3 of present embodiment, 1/32 mean value pmsm32 surpasses AD value pmad after two cycles of engine stroke.Press the air inlet of counting to press the variable quantity of pm to compare with the air inlet before 720 ℃ of A, its transition period is confirmed to be " 1440 ° of crank angles (CA) (two cycles of engine stroke) " counted from the transition marker for determination XKATO time of " 1 " of being set to.
In the present embodiment, obtain the final air inlet pressure PM that suitably records in propellant spray control with in controlling the duration of ignition, so just can calculate suitable air inflow, the propellant spray that is applicable to the transition operation is controlled and control the duration of ignition so that carry out rightly.Therefore, can in engine 3, realize having the transition operation of splendid response.For example, the operating lag in accelerating period may cause the decline of final propellant spray amount TAU with respect to air inflow, thereby causes air-fuel ratio inferior.On the other hand, according to present embodiment, can be at the suitable final propellant spray amount TAU of accelerating period acquisition, so that an appropriate air-fuel ratio A/F is provided with respect to air inflow, so just engine speed NE can be increased reposefully, and suitable driveability can be guaranteed.
Figure 12 (a)-12 (c) shows various values during the transition of engine 3 operation (accelerations), is the time diagram of the situation of change of AD value pmad, 1/4 mean value pmsm4, lower limit pmlo (corresponding with final air inlet pressure PM), air-fuel ratio A/F and engine speed NE.Figure 13 (a)-13 (c) be show various values during the transition of engine 3 operation (accelerations) similarly, be the time diagram of the situation of change of AD value pmad, 1/32 mean value pmsm32, lower limit pmlo (corresponding), air-fuel ratio A/F and engine speed NE with final air inlet pressure PM.
From Figure 12 (a)-12 (c), can be clear that, under the situation that is used for making comparisons at 1/4 mean value pmsm4 with AD value pmad, variation among the AD value pmad be right after after the acceleration at time t0 place begins obtained in time t1 place, so that determine lower limit pmlo (corresponding), and air/fuel is controlled so as to suitable value than A/F with final air inlet pressure PM.So engine speed NE can increase reposefully.On the other hand, in Figure 13 (a)-13 (c), 1/32 mean value pmsm32 is used for making comparisons with AD value pmad, and the variation among the AD value pmad is obtained at the time t2 place that slightly lags behind the time t0 that quickens beginning, so that determine lower limit pmlo (corresponding with final air inlet pressure PM).Therefore, can find, the air-fuel ratio A/F poor quality that after quickening beginning, becomes, this can cause the delay in the increase of engine speed NE.Susceptible of proof as institute the comparison between Figure 12 and 13, adopt the 1/4 mean value pmsm4 comparable employing 1/32 mean value pmsm32 that compares with AD value pmad to produce more advantage crossing the ripple run duration.
Press pick-up unit according to above-mentioned air intake pressure testing method and air inlet in the present embodiment, changing the mean coefficient that is used for calculating mean value can provide three mean value pmsm4, pmsm32 and the pmsm128 that has different amplitudes separately.Therefore, can in three mean value pmsm4, pmsm32 and pmsm128, select to be used as the protection value pmsm that is applicable to the mean value of making comparisons according to the running status of engine 3 with the lower limit of AD value pmad.Thus, the characteristic of pulsation is pressed in the air inlet that response changes according to running status, is not included interior by the caused unconventional lower limit of engine blowback.Can prevent that this unconventional lower limit is confirmed as final air inlet and presses PM.Like this, can suitably calculate relevant lower limit pmlo, so just can respond running status and detect final air inlet pressure PM with AD value pmad according to the various running statuses of engine 3.
According to the engine system in the present embodiment, at the run duration of engine 3, engine speed NE is detected by speed probe 23.The air inlet of engine run duration presses pm to be detected by air inlet pressure sensor 21, and on the basis of the AD of detected value value, ECU20 calculates the lower limit pmlo that the pulsation air inlet is pressed.Similarly, at the engine run duration, air inlet presses pm to be detected by air inlet pressure sensor 21, and on the basis of the AD of detected value value, ECU20 also calculates various mean value pmsm4, pmsm32 and the pmsm128 of the air inlet pressure of pulsation.According to the running status of engine 3, one of them that can select three mean value pmsm4, pmsm32 and pmsm128 for use is worth pmsm as protection.As the lower limit pmlo that calculates during less than protection value pmsm, this lower limit is considered to final air inlet and presses PM.Then, press in final air inlet on the basis of detected value of the determined value of PM and engine speed NE, ECU 20 calculate final fuel spray amount TAU and final duration of ignition IT as transportation load.Utilize those transportation loads TAU and IT, ECU20 control ejector filler 4 and ignition coil 13 etc. are used to carry out propellant spray control and the control duration of ignition.
In aforesaid way, the unconventional lower limit that fluctuation produced by the caused AD value of the blowback of engine 3 is not very pressed within the AD value pmad of pm in the air inlet of pulsation, so that in the control of ejector filler 14 and ignition coil 13 etc., have only suitable lower limit pmlo to be got and press PM as final air inlet.Press pm to fluctuate even be accompanied by the air inlet of pulsation like this, also can find final fuel spray amount TAU and final duration of ignition IT suitable value as transportation load.Therefore, press the situation of change of pm can suitably control ejector filler 14, ignition coil 13 etc. according to air inlet.Can high stability and response and carry out propellant spray control and the control duration of ignition with the high correlation of actual air inflow, and the influence of the fluctuation of the air inlet that can not be pulsed in pressing.In addition, can stably carry out control, and can not be subjected to the influence of the blowback in the engine 3.
Under the prerequisite that does not break away from spirit of the present invention or essence, the present invention can also other particular form realize.For example, can adopt following replacement.
(1) in the above-described embodiments, to press pick-up unit and control device be to realize with the engine system that includes single-barrel engine 3 to the present invention's air intake pressure testing method, air inlet of being used for explosive motor.Perhaps, they can include two, three or more realize in other engine system of multicylinder engine.Yet owing to the increase along with cylinder body quantity of the amplitude of charge pulsation reduces, thereby the present invention is especially effective especially to the engine of three-cylinder engine one.
(2) in the above-described embodiments, the present invention is applied to propellant spray control and the control duration of ignition, but is not limited in this.Other control that the present invention also can be used for exhaust gas recirculatioon control and the air inlet pressure is used as one of them driving parameters.
(3) in the above-described embodiments, 1/32 mean value pmsm32 is used for making comparisons with AD value pmad during the conventional operation of engine 3,1/128 mean value pmsm128 is used for during starts the making comparisons with AD value pmad of engine 3, and 1/4 mean value pmsm4 then adopts at the transition run duration of engine 3.Perhaps, the mean coefficient that is used for the mean value of making comparisons with AD value pmad can suitably change according to the type and the displacement of target engine.For example, except that 1/4 mean value pmsm4,1/32 mean value pmsm32 and 1/124 mean value pmsm128, also can adopt 1/8 mean value pmsm8,1/16 mean value pmsm16 and 1/64 mean value pmsm64.
(4) in the above-described embodiments, be set to " the 1440 ℃ of A (two cycles of engine stroke) " counted from the transition marker for determination XKATO time of " 1 " of being set to from variation period of 1/32 mean value pmsm32 to 1/4 mean value pmsm4.Perhaps, this variation period can suitably change according to the type and the displacement of target engine.In other words, can replace " 1440 ℃ of A (two cycles of engine stroke) " employing " 1080 ℃ of A (semiperiod of engine stroke) " or " 2160 ℃ of A (three cycles of engine stroke) ".
Though illustrated and described current preferred embodiment of the present invention, it being understood that what this disclosure was just used as example, do not breaking away under the prerequisite of enumerating the scope of the invention in accessory claim, the present invention also can have various variations and modification.
Claims (5)
1. the air intake pressure testing method of an explosive motor is characterized in that, comprises the following steps:
Calculate the lower limit that the air inlet of the run duration pulsation of described explosive motor is pressed;
Calculate the mean value of the air inlet pressure of described pulsation together with described lower limit; And
When described lower limit during, described lower limit is defined as the calculated value that air inlet is pressed less than described mean value.
2. the method for claim 1, it is characterized in that, the calculating of described mean value is all value equalizations that the air inlet of the pulsation of will take a sample at interval with preset time is pressed, comprise with different mean coefficients and calculate a plurality of mean values simultaneously, so that from the mean value of calculating, select to be applicable to the mean value of making comparisons with described lower limit according to the running status of described explosive motor.
3. pick-up unit is pressed in the air inlet of an explosive motor, it is characterized in that, comprising:
Be used to detect the air inlet that the air inlet of explosive motor presses and press detection means;
The lower limit that is used for the lower limit of the air inlet pressure of the run duration pulsation of calculating explosive motor on the basis of the resulting detected value of described air inlet pressure detection means is calculated means;
Be used on the basis of the resulting detected value of detection means is pressed in air inlet, calculating the mean value calculation means of the mean value that the air inlet of the run duration pulsation of explosive motor presses; And
Be used for pressing and determine means when the air inlet that described lower limit is defined as described lower limit during less than described mean value the calculated value that air inlet presses.
4. device as claimed in claim 3 is characterized in that, all value equalizations that the air inlet of the pulsation that described mean value calculation means will be taken a sample at interval with preset time is pressed are so that calculate a plurality of mean values with different mean coefficients; And
Described device also comprises the mean value selection approach that is used for being applicable in described a plurality of mean values selections of calculating according to the running status of explosive motor the mean value of making comparisons with described lower limit.
5. the control device of the control main body of an operation that is used to control relevant explosive motor is characterized in that, comprising:
Be used to detect the rotating speed detection means of the rotating speed of described explosive motor;
Be used to detect the air inlet that the air inlet of described explosive motor presses and press detection means;
The lower limit that is used for the lower limit of the air inlet pressure of the run duration pulsation of calculating explosive motor on the basis of the resulting detected value of described air inlet pressure detection means is calculated means;
The mean value calculation means that are used for the mean value of the air inlet pressure of the run duration pulsation of calculating explosive motor on the basis of the resulting detected value of described air inlet pressure detection means;
Be used for pressing and determine means when the air inlet that described lower limit is defined as described lower limit during less than described mean value the calculated value that air inlet presses;
Be used for pressing the operational ton that calculates the operational ton that is used to obtain required controlled quentity controlled variable on the basis of determining calculated value that the determined air inlet of means is pressed and the resulting rotating speed detected value of described rotating speed detection means to calculate means by described air inlet; And
Be used on the basis of the controlled quentity controlled variable that the means of being calculated by described controlled quentity controlled variable are calculated, controlling the control device of described controlled quentity controlled variable by controlling described control main body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001277499 | 2001-09-13 | ||
| JP2001277499A JP3973387B2 (en) | 2001-09-13 | 2001-09-13 | Intake pressure detection method for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1407321A true CN1407321A (en) | 2003-04-02 |
| CN1266461C CN1266461C (en) | 2006-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02131993 Expired - Fee Related CN1266461C (en) | 2001-09-13 | 2002-08-28 | Air intake pressure testing method of IC engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3973387B2 (en) |
| CN (1) | CN1266461C (en) |
| IT (1) | ITMI20021907A1 (en) |
| TW (1) | TW552408B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620884A (en) * | 2012-03-30 | 2012-08-01 | 潍柴动力股份有限公司 | Equipment and method for detecting cylinder pressure |
| CN105910754A (en) * | 2016-04-05 | 2016-08-31 | 海洋石油工程股份有限公司 | Pressure pulsation indicator and method for realizing pressure pulsation indication |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008208828A (en) * | 2007-01-31 | 2008-09-11 | Yamaha Motor Co Ltd | Vehicle, controller and control method therefor, abnormality detection device for idle speed control device, and abnormality detection method for idle speed control device |
| KR102199901B1 (en) * | 2017-01-23 | 2021-01-08 | 현대자동차주식회사 | Method for detecting pressure sensor in intake system of engine |
-
2001
- 2001-09-13 JP JP2001277499A patent/JP3973387B2/en not_active Expired - Fee Related
-
2002
- 2002-07-26 TW TW91116805A patent/TW552408B/en not_active IP Right Cessation
- 2002-08-28 CN CN 02131993 patent/CN1266461C/en not_active Expired - Fee Related
- 2002-09-09 IT ITMI20021907 patent/ITMI20021907A1/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620884A (en) * | 2012-03-30 | 2012-08-01 | 潍柴动力股份有限公司 | Equipment and method for detecting cylinder pressure |
| CN105910754A (en) * | 2016-04-05 | 2016-08-31 | 海洋石油工程股份有限公司 | Pressure pulsation indicator and method for realizing pressure pulsation indication |
| CN105910754B (en) * | 2016-04-05 | 2018-09-18 | 中国海洋石油总公司 | A kind of pressure fluctuation indicator and the method for realizing pressure fluctuation instruction |
Also Published As
| Publication number | Publication date |
|---|---|
| TW552408B (en) | 2003-09-11 |
| CN1266461C (en) | 2006-07-26 |
| JP2003083151A (en) | 2003-03-19 |
| JP3973387B2 (en) | 2007-09-12 |
| ITMI20021907A1 (en) | 2003-03-14 |
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