JP2015124758A - Electronic control throttle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic control throttle system that accurately detects that noise-like output change occurs in output of a throttle opening sensor, and properly selects output of the throttle opening sensor to suppress abrupt change of engine output.SOLUTION: A throttle opening sensor selection unit 12 selects, between a first throttle opening sensor 26a and a second throttle opening sensor 26b, output of one having output indicating a change direction following the change direction of a target throttle opening TRG.

Description

  The present invention relates to an electronically controlled throttle system, and more particularly to an electronically controlled throttle system that performs feedback control so that the opening of a throttle valve matches a target throttle opening.

  In recent years, the throttle valve is driven so that the throttle valve opening (actual throttle opening) detected by the throttle opening sensor matches the target throttle opening corresponding to the accelerator instruction opening detected by the accelerator sensor. An electronically controlled throttle system that feedback-controls a motor has been proposed.

  Such an electronically controlled throttle system is equipped with a dual system throttle opening sensor, one of which is the main system and the other is the auxiliary system, and the output value of the main system's Lottle opening sensor is used. In addition to performing feedback control, etc., the validity of the feedback control is performed using the output value of the Lottle opening sensor of the auxiliary system.

  Further, in such an electronically controlled throttle system, a potentiometer configured to change a resistance value by sliding a brush on a printed resistor is used as a double system throttle opening sensor. There is something.

  Under such circumstances, Patent Document 1 relates to a throttle opening detection device, detects an abnormality of the throttle opening sensor based on the rate of change of the output value of each system, and based on the output value of the system determined to be normal. The configuration for calculating the actual throttle opening is disclosed.

  Further, Patent Document 2 relates to a detection device, and detects abnormality of the throttle opening sensor based on whether or not the change speed of the output value of each system of the dual throttle opening sensor is within a predetermined range. A configuration is disclosed in which the actual throttle opening is calculated based on the output value of the throttle opening sensor of the system in which the change rate of the output value is within a predetermined range. Further, in the configuration of Patent Document 2, when the change speeds of the output values of all the systems of the dual system throttle opening sensors are not within the predetermined range, the difference of the change speeds is calculated and the difference of the change speeds is calculated. Is within the predetermined range, the actual throttle opening is calculated based on the output value of the throttle opening sensor having the smaller actual throttle opening value.

Japanese Patent No. 63-71552 JP-A-9-209809

  However, according to the study of the present inventor, in the throttle opening sensor composed of a potentiometer, the printing resistor and the brush are momentarily interrupted due to abrasion powder or scratches generated by sliding between the printing resistor and the brush. Or the increase in the contact resistance between the printing resistor and the brush may cause a tendency to cause a noisy output change.

According to the study of the present inventors, in the configurations of Patent Document 1 and Patent Document 2, abnormality of the throttle opening sensor is detected based only on the output value of each system of the dual throttle opening sensor. doing. For this reason, when a throttle opening sensor composed of a potentiometer is applied to the configurations of Patent Document 1 and Patent Document 2, the output value of the throttle opening sensor has simply changed in noise, or the target throttle opening Therefore, it is impossible to accurately distinguish and determine whether it has changed due to abrupt change, and there is room for improvement in noise detection accuracy.

  Further, according to the study of the present inventor, in the configurations of Patent Document 1 and Patent Document 2, the deviation between the actual throttle opening calculated from the output value of the selected system and the target throttle opening is large. In this case, the throttle valve opening may change abruptly in accordance with the deviation, and the engine output may change unnecessarily rapidly.

  The present invention has been made through the above studies, and accurately detects that a noise-like output change has occurred in the output of the throttle opening sensor and appropriately selects the output of the throttle opening sensor, An object of the present invention is to provide an electronically controlled throttle system capable of suppressing a sudden change in engine output.

  In order to achieve the above object, the present invention is an electronically controlled throttle system that calculates a target throttle opening and performs feedback control so that the opening of the throttle valve coincides with the calculated target throttle opening, A first throttle opening sensor and a second throttle opening sensor for detecting an actual throttle opening, which is an actual opening of the throttle valve, and the first throttle opening sensor and the second throttle opening; A throttle opening sensor selecting unit that selects an output of one of the throttle opening sensors, and the throttle opening sensor selecting unit includes the first throttle opening sensor and the second throttle opening sensor. Selecting the output of the degree sensor having an output indicating a change direction following the change direction of the target throttle opening. As one of the aspects.

  According to the present invention, in addition to the first aspect, the electronic control throttle system is detected by a target throttle opening change amount that is a change amount of the target throttle opening and the first throttle opening sensor. A first actual throttle opening change amount which is a change amount of the actual throttle opening, and a second actual throttle opening which is a change amount of the actual throttle opening detected by the second throttle opening sensor. The throttle opening sensor selection unit calculates a first deviation that is a deviation between the target throttle opening variation and the first actual throttle opening variation, and the target throttle. A second deviation which is a deviation between the opening change amount and the second actual throttle opening change amount is calculated, and corresponds to a smaller one of the first deviation and the second deviation. Slot Selecting the output of the LE opening sensor and the second aspect.

  In addition to the second aspect, the present invention provides the electronically controlled throttle system, wherein the throttle opening sensor selection unit has the target throttle opening change amount larger than a predetermined change amount, and the first actual throttle When the amount of change in opening is less than or equal to the predetermined amount of change and the amount of change in second actual throttle opening is less than or equal to the predetermined amount of change, the first throttle opening sensor and the second throttle opening It is a third aspect to select the output of the degree sensor selected in the previous selection process by the throttle opening sensor selection unit.

According to the electronically controlled throttle system according to the first aspect of the present invention described above, the throttle opening sensor selection unit selects the target throttle opening among the first throttle opening sensor and the second throttle opening sensor. Since the output having the output indicating the change direction following the change direction is selected, the accelerator operation member is operated in the opening direction, particularly during acceleration of the vehicle, and the first throttle opening sensor and the second The direction of change in the output of each of the first throttle opening sensor and the second throttle opening sensor under a situation where noise can be confirmed on at least one of the two throttle opening sensors Even if the values are different, it is possible to accurately detect that a noise-like output change has occurred in the output of one of these throttle opening sensors, and Can throttle opening to reduce the operation amount in the feedback control to converge to the target throttle opening degree can be the engine output is prevented from being changed unnecessarily rapidly.

  Further, according to the electronically controlled throttle system according to the second aspect of the present invention, the throttle opening sensor selection unit is a first difference between the target throttle opening change amount and the first actual throttle opening change amount. And a second deviation which is a deviation between the target throttle opening change amount and the second actual throttle opening change amount, and the smaller one of the first deviation and the second deviation is calculated. Since the output of the throttle opening sensor corresponding to the deviation is selected, especially when the accelerator operation member is operated gently during cruising or deceleration of the vehicle, or during acceleration of the vehicle, In a situation where the accelerator operating member is operated in the opening direction and a situation in which noise is on at least one of the first throttle opening sensor and the second throttle opening sensor can be confirmed, the first Slot Even if the output change direction of each of the throttle opening sensor and the second throttle opening sensor is the same, a noise-like output change has occurred in the output of any one of these throttle opening sensors , The amount of operation in feedback control in which the actual throttle opening converges to the target throttle opening can be reduced, and the engine output can be prevented from changing unnecessarily and rapidly.

  Further, according to the electronically controlled throttle system according to the third aspect of the present invention, the throttle opening sensor selection unit has the target throttle opening change amount larger than the predetermined change amount, and the first actual throttle opening change amount is When the amount of change is equal to or less than the predetermined change and the second actual throttle opening change is equal to or less than the predetermined change, the throttle opening of the first throttle opening sensor and the second throttle opening sensor. Since the output of the one selected in the previous selection process by the sensor selection unit is selected, feedback control can be performed while reducing the amount of calculation processing in the selection process of the throttle opening sensor selection unit.

FIG. 1 is a block diagram showing the configuration of a vehicle electronic control device applied to an electronic control throttle system according to an embodiment of the present invention. FIG. 2 is a flowchart showing a flow of throttle opening control processing of the electronically controlled throttle system in the present embodiment. FIG. 3 is a timing chart for explaining the flow of throttle opening control processing of the electronically controlled throttle system in the present embodiment.

  Hereinafter, an electronically controlled throttle system according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

[Configuration of electronically controlled throttle system]
First, with reference to FIG. 1, the structure of the vehicle electronic control apparatus applied to the electronic control throttle system in this embodiment is demonstrated in detail.

  FIG. 1 is a block diagram showing a configuration of a vehicle electronic control device applied to the electronic control throttle system in the present embodiment.

As shown in FIG. 1, a vehicle electronic control device 1 applied to an electronically controlled throttle system in the present embodiment is mounted on a vehicle such as a motorcycle and a CPU (Cen not shown).
It is an arithmetic processing unit such as a microcomputer having a (Tral Processing Unit) or a memory, and is typically an ECU (Electronic Control Unit). The vehicle electronic control device 1 reads a necessary control program and control data from the memory, and executes a control program for throttle opening control processing or the like.

  Specifically, the vehicle electronic control device 1 includes an accelerator opening calculation unit 2, an intake pressure calculation unit 3, an engine temperature calculation unit 4, a vehicle speed calculation unit 5, an engine speed calculation unit 6, and a throttle opening calculation unit 7a. 7b, throttle opening filter value calculation units 8a and 8b, deviation calculation units 9a and 9b, target throttle opening filter value calculation unit 10, deviation calculation unit 11, throttle opening sensor selection unit 12, and throttle opening setting after selection A unit 12a, a fuel ignition control unit 13, a target throttle opening calculation unit 14, a deviation calculation unit 15, a throttle opening feedback (F / B) control unit 16, and a motor drive output unit 17. These may be realized as a functional block of the CPU or an electric circuit in the vehicle electronic control device 1.

  The accelerator opening calculation unit 2 is based on an output signal from an accelerator opening sensor 21 that detects an accelerator operation of an occupant in the vehicle, specifically, an operation amount of an accelerator operation member such as an accelerator grip (not shown). The opening is calculated, and a signal indicating the accelerator opening thus calculated is output to the fuel ignition control unit 13 and the target throttle opening calculation unit 14.

  The intake pressure calculation unit 3 calculates the pressure of intake air (intake pressure) based on an output signal from the intake pressure sensor 22, and uses the signal indicating the intake pressure thus calculated as the fuel ignition control unit 13 and the target throttle. Output to the opening calculation unit 14.

  The engine temperature calculation unit 4 calculates the temperature of the engine E based on the output signal from the engine temperature sensor 23, and uses the signal indicating the temperature of the engine E thus calculated as the fuel ignition control unit 13 and the target throttle opening degree. Output to the calculation unit 14.

  The vehicle speed calculation unit 5 calculates the vehicle speed of the vehicle based on the output signal from the vehicle speed sensor 24, and outputs a signal indicating the vehicle speed calculated in this way to the fuel ignition control unit 13 and the target throttle opening calculation unit 14. .

  The engine speed calculation unit 6 calculates the engine speed of the engine E based on the output signal from the crank sensor 25, and the signal indicating the engine speed calculated in this way is used as the fuel ignition control unit 13 and the target throttle. Output to the opening calculation unit 14.

  The throttle opening calculation unit 7a calculates the opening (actual throttle opening) of the throttle valve T provided in the intake system of the engine E based on the output signal from the throttle opening sensor 26a. A signal indicating the actual throttle opening is output to the throttle opening filter value calculation unit 8a, the deviation calculation unit 9a, and the post-selection throttle opening setting unit 12a.

  The throttle opening calculation unit 7b calculates an actual throttle opening based on an output signal from the throttle opening sensor 26b, and a signal indicating the actual throttle opening calculated in this way is used as a throttle opening filter value calculation unit 8b. And output to the deviation calculating unit 9b and the throttle opening setting unit 12a after selection. The throttle opening sensors 26a and 26b are both applied to the same throttle valve T, and each output a signal (electric signal) corresponding to the opening (actual throttle opening), one of which is the throttle The other is used for feedback control of the opening degree of the valve T, and the other is used for reference for checking the validity of the feedback amount.

The throttle opening filter value calculation unit 8a calculates a first filter throttle opening obtained by performing filter processing on the actual throttle opening output from the throttle opening calculation unit 7a. The throttle opening filter value calculation unit 8a outputs a signal indicating the first filter throttle opening calculated in this way to the deviation calculation unit 9a.

  The throttle opening filter value calculation unit 8b calculates a second filter throttle opening obtained by performing filter processing on the actual throttle opening output from the throttle opening calculation unit 7b. The throttle opening filter value calculation unit 8b outputs a signal indicating the second filter throttle opening calculated in this way to the deviation calculation unit 9b.

  The deviation calculation unit 9a calculates a deviation between the actual throttle opening output from the throttle opening calculation unit 7a and the first filter throttle opening output from the throttle opening filter value calculation unit 8a. A signal indicating the first actual throttle opening change amount calculated in this way is output to the throttle opening sensor selection unit 12.

  The deviation calculation unit 9b calculates the deviation between the actual throttle opening output from the throttle opening calculation unit 7b and the second filter throttle opening output from the throttle opening filter value calculation unit 8b. A signal indicating the second actual throttle opening change amount calculated in this way is output to the throttle opening sensor selection unit 12.

  The target throttle opening filter value calculation unit 10 calculates a target throttle opening filter value obtained by performing filter processing on the target throttle opening output from the target throttle opening calculation unit 14. The target throttle opening filter value calculation unit 10 outputs a signal indicating the target throttle opening filter value calculated in this way to the deviation calculation unit 11. If necessary, two target throttle opening filter value calculation units are provided to calculate the first target throttle opening filter value and the second target throttle opening filter value. Each of the signals indicating the target throttle opening filter value may be output to the deviation calculating unit 11.

  The deviation calculating unit 11 calculates a deviation between the target throttle opening filter value output from the target throttle opening filter value calculating unit 10 and the target throttle opening output from the target throttle opening calculating unit 14 as a target throttle opening change. A signal indicating the amount of change in the target throttle opening calculated in this way is output to the throttle opening sensor selector 12. If two target throttle opening filter value calculation units are provided as necessary, the first target throttle opening filter value and the second target throttle opening filter value respectively output from these are calculated. Is calculated as a target throttle opening change amount, and a signal indicating the target throttle opening change amount calculated in this way is output to the throttle opening sensor selection unit 12.

  The throttle opening sensor selection unit 12 includes a first actual throttle opening change amount output from the deviation calculating unit 9a, a second actual throttle opening change amount output from the deviation calculating unit 9b, and a deviation calculating unit 11. A signal (output value) indicating the actual throttle opening output from the throttle opening calculation unit 7a and an actual throttle opening output from the throttle opening calculation unit 7b based on the target throttle opening change amount output from One of the signals (output value) indicating is selected. The throttle opening sensor selection unit 10 outputs a signal indicating the selection result thus selected to the throttle opening setting unit 10a after selection.

The post-selection throttle opening setting unit 12a outputs the actual throttle opening output from the throttle opening calculation unit 7a and the throttle opening calculation unit 7b based on the selection result output from the throttle opening selection unit 12. Of the actual throttle opening, or the first filter throttle opening output from the throttle opening filter value calculation unit 8a and the second filter throttle opening output from the throttle opening filter value calculation unit 8b. One of these is set as the throttle opening after selection. The post-selection throttle opening setting unit 10a sends a signal indicating the post-selection throttle opening set in this way to the fuel ignition control unit 13, the target throttle opening calculation unit 14,
And output to the deviation calculator 15.

  The fuel ignition control unit 13 is an output signal from the accelerator opening calculation unit 2, the intake pressure calculation unit 3, the engine temperature calculation unit 4, the vehicle speed calculation unit 5, the engine speed calculation unit 6, and the throttle opening sensor selection unit 12. Based on the above, the fuel injection operation FI and the ignition operation of the engine E are controlled by controlling the fuel injection system FI and the ignition system IG.

  The target throttle opening calculation unit 14 includes an accelerator opening calculation unit 2, an intake pressure calculation unit 3, an engine temperature calculation unit 4, a vehicle speed calculation unit 5, an engine speed calculation unit 6, and a throttle opening sensor selection unit 12. Based on the output signal as appropriate, the target opening of the throttle valve T (target throttle opening) is calculated. The target throttle opening calculation unit 14 outputs a signal indicating the target throttle opening calculated in this way to the target throttle opening filter value calculation unit 10 and the deviation calculation unit 15. If two target throttle opening filter value calculation units are provided as necessary, the target throttle opening calculation unit 14 sends a signal indicating the target throttle opening thus calculated to these target throttle openings. It outputs to the opening degree filter value calculation part and the deviation calculation part 15, respectively.

  The deviation calculating unit 15 calculates a deviation between the actual throttle opening indicated by the signal output from the throttle opening sensor selecting unit 12 and the target throttle opening indicated by the signal output from the target throttle opening calculating unit 14. Then, a signal indicating the deviation calculated in this way is output to the throttle opening F / B control unit 16.

  The throttle opening F / B control unit 16 sends a control signal to the motor drive output unit 17 based on the deviation indicated by the signal output from the deviation calculating unit 15 so that the actual throttle opening matches the target throttle opening. Output.

  The motor drive output unit 17 outputs a drive signal for driving the throttle valve T to the motor M in accordance with the control signal output from the throttle opening F / B control unit 16.

  Here, throttle opening calculation units 7a and 7b, throttle opening filter value calculation units 8a and 8b, deviation calculation units 9a and 9b, target throttle opening filter value calculation units 10a and 10b, deviation calculation unit 11, throttle opening Sensor selection unit 12, fuel ignition control unit 13, target throttle opening calculation unit 14, deviation calculation unit 15, throttle opening F / B control unit 16, motor drive output unit 17, throttle opening sensors 26a and 26b, throttle valve The throttle system including T and motor M is an electronically controlled throttle system S, in which throttle opening calculation units 7a and 7b, throttle opening filter value calculation units 8a and 8b, deviation calculation units 9a and 9b, Target throttle opening filter value calculation units 10a and 10b, deviation calculation unit 11, throttle opening sensor selection unit 12, fuel ignition control 13, the target throttle opening calculation section 14, deviation calculating section 15, the throttle opening degree F / B control section 16 and the motor drive output unit 17, an electronic throttle control unit in the electronic control throttle system S.

  The electronically controlled throttle system S having such a configuration accurately detects that a noise-like output change has occurred in the outputs of the throttle opening sensors 26a and 26b by executing the throttle opening control process described below. Thus, when the outputs of the throttle opening sensors 26a and 26b are switched, it is possible to prevent the engine output from changing suddenly. Hereinafter, with reference to FIG. 2 and FIG. 3, the flow of the throttle opening degree control process executed by the electronic control throttle system S in the present embodiment will be described.

[Throttle opening control processing]
FIG. 2 is a flowchart showing a flow of throttle opening control processing of the electronically controlled throttle system in the present embodiment. FIG. 3 is a timing chart for explaining the flow of throttle opening control processing of the electronically controlled throttle system in the present embodiment.

  As shown in the flowchart of FIG. 2, in the throttle opening degree control process in the present embodiment, power is supplied from the power source such as a battery mounted on the vehicle to the electronic control device 1 for the vehicle applied to the electronic control throttle system S. The process starts at the supplied timing, and the throttle opening control process proceeds to step S1. The throttle opening degree control process is stopped at the timing when such power is no longer supplied.

  In the process of step S1, the electronic throttle control unit executes an initialization process for resetting various parameters to be reset among various parameters calculated in the throttle opening control process. Thereby, the process of step S1 is completed and the throttle opening degree control process proceeds to the process of step S2.

  In the process of step S2, the target throttle opening calculation unit 14 includes an accelerator opening calculation unit 2, an intake pressure calculation unit 3, an engine temperature calculation unit 4, a vehicle speed calculation unit 5, an engine speed calculation unit 6, and a throttle opening. Based on the output signal from the sensor selector 12, the target throttle opening degree TRG is calculated. The target throttle opening calculation unit 14 outputs a signal indicating the target throttle opening TRG calculated in this way to the target throttle opening filter value calculation unit 10 and the deviation calculation unit 15. Thereby, the process of step S2 is completed, and the throttle opening degree control process proceeds to the process of step S3. If two target throttle opening filter value calculation units are provided as necessary, the target throttle opening calculation unit 14 sends a signal indicating the target throttle opening thus calculated to these target throttle openings. It outputs to the opening degree filter value calculation part and the deviation calculation part 15, respectively.

  Here, the target throttle opening degree TRG shows a time change as indicated by a thin solid line in the time chart of FIG.

  In step S3, the target throttle opening filter value calculation unit 10 calculates a target throttle opening filter value (TRG filter value) TRG_FLT using the target throttle opening TRG calculated in step S2. Specifically, the target throttle opening filter value calculation unit 10 calculates the TRG filter value TRG_FLT, the target throttle opening TRG and the filter coefficient CFLT calculated in the previous throttle opening control process (TRG_FLT * CFLT + TRG * ( 1.0-CFLT)), the TRG filter value TRG_FLT in the current process is calculated. Then, the target throttle opening filter value calculation unit 10 outputs a signal indicating the TRG filter value TRG_FLT calculated in this way to the deviation calculation unit 11 and stores it in the memory. Here, as the TRG filter value TRG_FLT and the filter coefficient CFLT calculated in the previous throttle opening control process, those stored in the memory are read out and used. Further, the filter coefficient CFLT is a positive integer equal to or less than 1, and may be defined by table data or the like given with the target throttle opening degree TRG as a parameter. Thereby, the process of step S3 is completed, and the throttle opening degree control process proceeds to the process of step S4.

If two target throttle opening filter value calculation units are provided as necessary, in step S3, these target throttle opening filter value calculation units are respectively converted into target throttle opening calculation units. 14 may be used to calculate target throttle opening filter values (TRG filter values) TRGA_FLT and TRGB_FLT (reference A corresponds to one target throttle opening filter value calculation unit, Symbol B corresponds to one target throttle opening filter value calculation unit). At this time, the filter coefficients CFLTA and CLFLTB used correspondingly are positive integers of 1 or less, and the value of CFLTA is preferably set smaller than the value of CFLTB. According to such filter coefficients CFLTA and CLFLTB, the filter effect on the target throttle opening TRG by one target throttle opening filter value calculation unit is set to the target throttle opening TRG by the other target throttle opening filter value calculation unit. It can be set stronger than the filter effect.

  In the process of step S4, the deviation calculating unit 11 sets the deviation between the target throttle opening TRG calculated in the process of step S2 and the TRG filter value TRG_FLT calculated in the process of step S3 as the target throttle opening change amount ΔTRG. calculate. Then, the deviation calculation unit 11 outputs a signal indicating the target throttle opening change amount ΔTRG calculated in this way to the throttle opening sensor selection unit 12. Thereby, the process of step S4 is completed, and the throttle opening degree control process proceeds to the process of step S5. If two target throttle opening filter value calculation units are provided as necessary, the deviation calculation unit 11 sets the deviation between the TRG filter values TRGA_FLT and TRGB_FLT calculated in the process of step S3 as the target. This is calculated as a throttle opening change amount ΔTRG.

  Here, the target throttle opening change amount ΔTRG shows a time change as indicated by a solid line in the time chart of FIG.

  In step S5, the throttle opening calculation unit 7a reads the output value TPS_1 of the throttle opening sensor 26a, and the throttle opening calculation unit 7b reads the output value TPS_2 of the throttle opening sensor 26b. Thereby, the process of step S5 is completed, and the throttle opening degree control process proceeds to the process of step S6.

  In the process of step S6, the throttle opening calculation unit 7a converts the output value TPS_1 of the throttle opening sensor 26a read in the process of step S5 into the actual throttle opening TH_1, and outputs a signal indicating the actual throttle opening TH_1. It outputs to the throttle opening filter value calculation part 8a and the deviation calculation part 9a. Further, the throttle opening calculation unit 7b converts the output value TPS_2 of the throttle opening sensor 26b read in the process of step S5 into the actual throttle opening TH_2, and a signal indicating the actual throttle opening TH_2 is converted into a throttle opening filter. It outputs to the value calculation part 8b and the deviation calculation part 9b. Thereby, the process of step S6 is completed, and the throttle opening degree control process proceeds to the process of step S7. The voltage value obtained by converting the target throttle opening value for matching the actual throttle opening to the output value of the throttle opening sensor 26a, 26b differs for each throttle opening sensor, so that the throttle opening sensors 26a, 26b By using the actual throttle opening value obtained by converting the output value into a physical value, it is possible to realize a highly accurate throttle opening control process while simplifying the calculation process.

  Here, the opening value TH_1 based on the output value TPS_1 of the throttle opening sensor 26a shows a time change as indicated by a thick solid line in the time chart of FIG. Further, the opening value TH_2 based on the output value TPS_2 of the throttle opening sensor 26b shows a time change as indicated by a thick dotted line in the time chart of FIG.

In the process of step S7, the throttle opening filter value calculation unit 8a calculates the first filter throttle opening TH_1_FLT in the current process using the actual throttle opening TH_1 calculated in the process of step S6. Specifically, the throttle opening filter value calculation unit 8a uses the calculation formula (TH_1_FLT * CFLT1 + TH_1 * (1.0−CFLT1)) as the first filter throttle opening TH_1_FLT in the previous throttle opening control process, step S6. By substituting the actual throttle opening TH_1 and the filter coefficient CFLT1 calculated in the above process, the first filter throttle opening TH_1_FLT in the current process is calculated and stored in the memory. Similarly, the throttle opening filter value calculation unit 8b calculates the second filter throttle opening THTH_2_FLT in the current process using the actual throttle opening TH_2 calculated in the process of step S6. Specifically, the throttle opening filter value calculation unit 8b adds the calculation formula (TH_2_FLT * CFLT2 + TH_2 * (1.0−CFLT2)) to the second filter throttle opening TH_2_FLT in the previous throttle opening control process, step S6. By substituting the actual throttle opening TH_2 and the filter coefficient CFLT2 calculated in the above processing, the second filter throttle opening THTH_2_FLT in the current processing is calculated and stored in the memory. Then, the throttle opening filter value calculation units 8a and 8b output signals indicating the first and second filter throttle opening TH_1_FLT and TH_2_FLT to the deviation calculation units 9a and 9b, respectively. Here, the first filter throttle opening TH_1_FLT and the second filter throttle opening TH_2_FLT and the filter coefficients CFLT1 and CFLT2 calculated in the previous throttle opening control process are read out and used in the memory. . The filter coefficients CFLT1 and CFLT2 in the calculation formula are typically positive integers of 1 or less that are different from each other, and one of the first filter throttle opening TH_1_FLT and the second filter throttle opening THTH_2_FLT. Can be set stronger than the filter effect on the other side. Further, the filter coefficients CFLT1 and CFLT2 may be defined by table data or the like given using the actual throttle openings TH_1 and TH_2 as parameters. Thereby, the process of step S7 is completed, and the throttle opening control process proceeds to the process of step S8.

  Here, the first filter throttle opening TH_1_FLT shows a time change as indicated by a one-dot chain line in the time chart of FIG. Further, the second filter throttle opening TH_2_FLT shows a time change as indicated by a two-dot chain line in the time chart of FIG.

  In the process of step S8, the deviation calculating unit 9a calculates the deviation between the actual throttle opening TH_1 calculated in the process of step S6 and the first filter throttle opening TH_1_FLT calculated in the process of step S7. This is calculated as a throttle opening change amount ΔTH1. Further, the deviation calculating unit 9b calculates a deviation between the actual throttle opening TH_2 calculated in the process of step S6 and the second filter throttle opening TH_2_FLT calculated in the process of step S7 as a second actual throttle opening change. Calculated as an amount ΔTH2. Then, the deviation calculation units 9a and 9b output signals indicating the first and second actual throttle opening change amounts ΔTH1 and ΔTH2 thus calculated to the throttle opening sensor selection unit 12, respectively. Thereby, the process of step S8 is completed, and the throttle opening degree control process proceeds to the process of step S9.

  Here, the first actual throttle opening change amount ΔTH1 shows a time change as indicated by a solid line in the time chart of FIG. Further, the second actual throttle opening change amount ΔTH2 shows a time change as indicated by a solid line in the time chart of FIG.

In the process of step S9, the throttle opening sensor selection unit 12 obtains sgn (ΔTRG) from the positive / negative sign of the value of the target throttle opening change amount ΔTRG calculated in the process of step S4. This is set as a change direction flag STRG for the degree change amount ΔTRG. Further, the throttle opening sensor selection unit 12 obtains sgn (ΔTH1) from the positive / negative sign of the value of the first actual throttle opening change amount ΔTH1 calculated in the process of step S8, and obtains it as the first actual It is set as a change direction flag STH1 of the throttle opening change amount ΔTH1. Further, the throttle opening sensor selection unit 12 obtains sgn (ΔTH2) from the sign of the value of the second actual throttle opening change amount ΔTH2 calculated in the processing of step S8, and obtains it as the second actual Throttle opening change amount ΔTH2 change direction flag STH
Set as 2. Here, the operation symbol sgn () is an operator in which the value in () is non-negative and 1 and the value in () is negative and -1. Thereby, the process of step S9 is completed, and the throttle opening degree control process proceeds to the process of step S10.

  Here, the value of the change direction flag STRG indicates a time change as indicated by a solid line in the time chart of FIG. 3E, and the value of the change direction flag STH1 is indicated by a solid line in the time chart of FIG. The change in the change direction flag STH2 indicates a change in time as indicated by a solid line in the time chart of FIG.

  In the process of step S10, the throttle opening sensor selection unit 12 calculates the target throttle opening change amount ΔTRG calculated in the process of step S4 and the first actual throttle opening change amount ΔTH1 calculated in the process of step S8. Is calculated as the first deviation ΔERR1. Similarly, the throttle opening sensor selector 12 determines the deviation between the target throttle opening change amount ΔTRG calculated in the process of step S4 and the second actual throttle opening change amount ΔTH2 calculated in the process of step S8. The absolute value is calculated as the second deviation ΔERR2. Thereby, the process of step S10 is completed, and the throttle opening degree control process proceeds to the process of step S11.

  In the process of step S11, the throttle opening sensor selection unit 12 determines whether or not the absolute value of the target throttle opening change amount ΔTRG calculated in the process of step S4 is larger than a predetermined change amount. As a result of the determination, when the absolute value of the target throttle opening change amount ΔTRG is larger than the predetermined change amount, the throttle opening selection unit 12 advances the throttle opening control process to the process of step S12. On the other hand, when the absolute value of the target throttle opening change amount ΔTRG is not greater than the predetermined change amount, the throttle opening selection unit 12 advances the throttle opening control process to the process of step S16.

  Here, in FIG. 3 (h), a time zone in which the absolute value of the target throttle opening change amount ΔTRG is not larger than the predetermined change amount (below) is shown as a time zone T3.

  In the process of step S12, the throttle opening sensor selection unit 12 determines whether or not the absolute value of the first actual throttle opening change amount ΔTH1 calculated in the process of step S8 is larger than a predetermined change amount. As a result of the determination, if the absolute value of the first actual throttle opening change amount ΔTH1 is larger than the predetermined change amount, the throttle opening selection unit 12 advances the throttle opening control process to the process of step S13. On the other hand, when the absolute value of the first actual throttle opening change amount ΔTH1 is not larger than the predetermined change amount, the throttle opening selection unit 12 advances the throttle opening control process to the process of step S17.

  In the process of step S13, the throttle opening sensor selection unit 12 determines whether or not the absolute value of the second actual throttle opening change amount ΔTH2 calculated in the process of step S8 is larger than a predetermined change amount. As a result of the determination, if the absolute value of the second actual throttle opening change amount ΔTH2 is larger than the predetermined change amount, the throttle opening selection unit 12 advances the throttle opening control process to the process of step S13. On the other hand, if the absolute value of the second actual throttle opening change amount ΔTH2 is not larger than the predetermined change amount, the throttle opening control process proceeds to the process of step S17.

  Here, in FIG. 3H, the absolute value of the first actual throttle opening change amount ΔTH1 is not larger than (or more than) the predetermined change amount, and the absolute value of the second actual throttle opening change amount ΔTH2 A time zone in which the value is not greater than (or greater than) the predetermined change amount is shown as a time zone T4.

In the process of step S14, the throttle opening sensor selection unit 12 determines whether or not the value of the change direction flag STH1 and the value of the change direction flag STH2 set in the process of step S9 are the same. It is determined whether or not the change direction of the first actual throttle opening change amount ΔTH1 is the same as the change direction of the second actual throttle opening change amount ΔTH2. As a result of the determination, when the value of the change direction flag STH1 and the value of the change direction flag STH2 are the same, the throttle opening sensor selection unit 12 determines the change direction of the first actual throttle opening change amount ΔTH1 and the first change direction. 2, the change direction of the actual throttle opening change amount ΔTH2 is determined to be the same, and the throttle opening control process proceeds to the process of step S16. On the other hand, when the value of the change direction flag STH1 and the value of the change direction flag STH2 are not the same, the throttle opening sensor selection unit 12 determines the change direction of the first actual throttle opening change amount ΔTH1 and the second actual It is determined that the change direction of the throttle opening change amount ΔTH2 is not the same, and the throttle opening control process proceeds to the process of step S15.

  Here, in FIG. 3H, a time zone in which the value of the change direction flag STH1 and the value of the change direction flag STH2 are the same is indicated by a time zone T1, and the value of the change direction flag STH1 and the value of the change direction flag STH2 A time zone in which is not the same is shown in a time zone T2.

  In the process of step S15, the throttle opening sensor selection unit 12 determines whether or not the value of the change direction flag STRG and the value of the change direction flag STH1 set in the process of step S9 are the same. It is determined whether or not the change direction of the target throttle opening change amount ΔTRG is the same as the change direction of the first actual throttle opening change amount ΔTH1. As a result of the determination, when the value of the change direction flag STRG and the value of the change direction flag STH1 are the same, the throttle opening sensor selection unit 12 determines the change direction of the target throttle opening change amount ΔTRG and the first actual value. It is determined that the change direction of the throttle opening change amount ΔTH1 is the same, and the throttle opening control process proceeds to the process of step S18. On the other hand, when the value of the change direction flag STRG and the value of the change direction flag STH1 are not the same, the throttle opening sensor selection unit 12 determines the change direction of the target throttle opening change amount ΔTRG and the second actual throttle opening. It is determined that the change direction of the change amount ΔTH2 is the same, and the throttle opening degree control process proceeds to the process of step S19.

  In the process of step S16, the throttle opening sensor selection unit 12 determines whether or not the absolute value of the first deviation ERR_1 calculated in the process of step S10 is less than or equal to the absolute value of the second deviation ERR_2. . As a result of the determination, if the absolute value of the first deviation ERR_1 is equal to or smaller than the absolute value of the second deviation ERR_2, the throttle opening sensor selection unit 12 advances the throttle opening control process to the process of step S20. On the other hand, when the absolute value of the first deviation ERR_1 is larger than the absolute value of the second deviation ERR_2, the throttle opening sensor selection unit 12 advances the throttle opening control process to the process of step S21.

  In the process of step S17, the throttle opening sensor selection unit 12 selects the output value TPS_1 of the throttle opening sensor 26a or the output value TPS_2 of the throttle opening sensor 26b of the same type as the selection result in the previous throttle opening control process. At the same time, the selection result is again stored in the memory. Based on the selection result, the post-selection throttle opening setting unit 12a corresponds to the output value TPS_1 of the throttle opening sensor 26a or the output value TPS_2 of the throttle opening sensor 26b read in the process of step S5. Of the actual throttle opening TH_n (n = 1 or 2) calculated in the above process, the one corresponding to the result selected in the previous throttle opening control process is set as the selected throttle opening. In addition, the electronic throttle control unit feedback-controls the opening of the throttle valve T so that the post-selection throttle opening set in this way matches the target throttle opening TRG calculated in step S2. Implement control. Thereby, the process of step S17 is completed and the throttle opening degree control process returns to the process of step S1.

    Here, in FIG.3 (h), the time slot | zone when the electronic throttle control in the process of step S17 is implemented is shown to the time slot | zone T4. In this time zone T4, the output value TPS_1 of the throttle opening sensor 26a or the output value TPS_2 of the throttle opening sensor 26b of the same type as the selection result in the previous throttle opening control process is selected.

  In the process of step S18, the throttle opening sensor selector 12 selects the throttle opening sensor 26a corresponding to the changing direction flag STH1 having the same value as the changing direction flag STRG out of the changing direction flag STH1 and the changing direction flag STH2. Output value TPS_1, in other words, the output value TPS_1 of the throttle opening sensor 26a indicating the change direction following the change direction of the target throttle opening change amount TRG, and the selection result is stored in the memory. Based on the selection result, the post-selection throttle opening setting unit 12a corresponds to the output value TPS_1 of the throttle opening sensor 26a read in the process of step S5, and the actual throttle opening calculated in the process of step S6. After selecting TH_1, the throttle opening is set. In addition, the electronic throttle control unit performs electronic throttle control for feedback control so that the post-selection throttle opening set in this way matches the target throttle opening TRG calculated in the process of step S2. Thereby, the process of step S18 is completed, and the throttle opening degree control process returns to the process of step S1.

  In the process of step S19, the throttle opening sensor selector 12 selects the throttle opening sensor 26b corresponding to the changing direction flag STH2 having the same value as the changing direction flag STRG among the changing direction flag STH1 and the changing direction flag STH2. Output value TPS_2, in other words, the output value TPS_2 of the throttle opening sensor 26b indicating the change direction following the change direction of the target throttle opening change amount TRG, and the selection result is stored in the memory. Based on the selection result, the post-selection throttle opening setting unit 12a corresponds to the output value TPS_2 of the throttle opening sensor 26b read in the process of step S5, and the actual throttle opening calculated in the process of step S6. After selecting TH_2, the throttle opening is set. In addition, the electronic throttle control unit performs electronic throttle control for feedback control so that the post-selection throttle opening set in this way becomes the target throttle opening TRG calculated in the process of step S2. Thereby, the process of step S19 is completed, and the throttle opening degree control process returns to the process of step S1.

    Here, in FIG. 3 (h), a time zone in which the electronic throttle control in the process of step S18 or the process of step S19 is performed is shown in a time zone T2, and in the process of step S18, the output of the throttle opening sensor 26a. While the value TPS_1 is selected, the output value TPS_2 of the throttle opening sensor 26b is selected in the process of step S19.

In the process of step S20, the throttle opening sensor selection unit 12 selects the output value TPS_1 of the throttle opening sensor 26a read in the process of step S5, and stores the selection result in the memory. Based on the selection result, the post-selection throttle opening setting unit 12a corresponds to the output value TPS_1 of the throttle opening sensor 26a read in the process of step S5, and the actual throttle opening calculated in the process of step S6. After selecting TH_1, the throttle opening is set. In addition, the electronic throttle control unit performs electronic throttle control for feedback control so that the post-selection throttle opening set in this way matches the target throttle opening TRG calculated in the process of step S2. This is when the absolute value of the target throttle opening change amount ΔTRG is not greater than (or less than) the predetermined change amount and the absolute value of the first deviation ERR_1 is less than or equal to the absolute value of the second deviation ERR_2. This means that the electronic throttle control is performed based on the actual throttle opening TH_1 with a small deviation from the target throttle opening change amount ΔTRG, and the excessive responsiveness of the control can be suppressed. Thereby, the process of step S20 is completed and the throttle opening degree control process returns to the process of step S1.

  In the process of step S21, the throttle opening sensor selection unit 12 selects the output value TPS_2 of the throttle opening sensor 26b read in the process of step S5, and stores this selection result in the memory. Based on the selection result, the post-selection throttle opening setting unit 12a corresponds to the output value TPS_2 of the throttle opening sensor 26b read in the process of step S5, and the actual throttle opening calculated in the process of step S6. After selecting TH_2, the throttle opening is set. In addition, the electronic throttle control unit performs electronic throttle control for feedback control so that the post-selection throttle opening set in this way matches the target throttle opening TRG calculated in the process of step S2. This is when the absolute value of the target throttle opening change amount ΔTRG is not larger than the predetermined change amount (below) and the absolute value of the second deviation ERR_2 is less than the absolute value of the second deviation ERR_2. This means that the electronic throttle control is performed based on the actual throttle opening TH_2 with a small deviation from the target throttle opening change amount ΔTRG, and the excessive responsiveness of the control can be suppressed. Thereby, the process of step S21 is completed and the throttle opening degree control process returns to the process of step S1.

    Here, in FIG. 3 (h), the time zone in which the electronic throttle control in the process of step S20 or the process of step S21 is performed is shown in the time zone T1 or the time zone T3. In the process of step S20, the throttle opening degree While the output value TPS_1 of the sensor 26a is selected, the output value TPS_2 of the throttle opening sensor 26b is selected in the process of step S21.

  As is clear from the above description, in the configuration of the electronically controlled throttle system S in the present embodiment, the throttle opening sensor selection unit 12 includes the first throttle opening sensor 26a and the second throttle opening sensor 26b. Since the output indicating the change direction following the change direction of the target throttle opening degree TRG is selected, the output is selected, so that the accelerator operation member is operated in the opening direction particularly during acceleration of the vehicle. The first throttle opening sensor 26a and the second throttle opening sensor 26a and the second throttle opening sensor 26b can be confirmed under a situation where noise can be confirmed on at least one of the first throttle opening sensor 26a and the second throttle opening sensor 26b. Even when the output change directions of the throttle opening sensors 26b are different, these throttle opening sensors 26a The amount of operation in feedback control in which the actual throttle opening TH_1 and TH_2 converge to the target throttle opening TRG can be reduced while accurately detecting that a noise-like output change has occurred in any of the outputs of 26b. It is possible to suppress the engine output from changing suddenly unnecessarily.

Further, in the configuration of the electronically controlled throttle system S in the present embodiment, the throttle opening sensor selection unit 12 is a first difference that is a deviation between the target throttle opening change amount ΔTRG and the first actual throttle opening change amount ΔTH1. A deviation ERR_1 and a second deviation ERR_2 which is a deviation between the target throttle opening change amount ΔTRG and the second actual throttle opening change amount ΔTH2 are calculated, and the first deviation ERR_1 and the second deviation ERR_2 are calculated. Among them, since the output of the throttle opening sensor corresponding to the smaller deviation is selected, especially when the accelerator operation member is operated gently during cruising or deceleration of the vehicle, or the vehicle At the time of acceleration or the like, the accelerator operation member is operated in the opening direction, and the first throttle opening sensor 26a and the second throttle opening sensor 26b are few. In both cases, the direction of change in the output of each of the first throttle opening sensor 26a and the second throttle opening sensor 26b is the same under a situation in which noise can be confirmed on one side. Even so, the actual throttle opening TH_1, TH_2 becomes the target throttle opening TRG while accurately detecting that a noise-like output change has occurred in the output of any one of these throttle opening sensors 26a, 26b. The amount of operation in the feedback control that converges can be reduced, and the engine output can be prevented from changing unnecessarily and rapidly.

  In the configuration of the electronically controlled throttle system S in the present embodiment, the throttle opening sensor selection unit 12 determines that the target throttle opening change amount ΔTRG is larger than the predetermined change amount, and the first actual throttle opening change amount ΔTH1 is the predetermined amount. If the second actual throttle opening change amount ΔTH2 is less than or equal to the predetermined change amount, the throttle amount of the first throttle opening sensor 26a and the second throttle opening sensor 26b is Since the output of the one selected in the previous selection process by the opening sensor selection unit 12 is selected, feedback control can be performed while reducing the amount of calculation processing in the selection process of the throttle opening sensor selection unit 12.

  In the present invention, the type, shape, arrangement, number, and the like of the members are not limited to the above-described embodiment, and the gist of the invention is appropriately replaced such that the constituent elements are appropriately replaced with those having the same operational effects. Of course, it can be changed as appropriate without departing from the scope.

  As described above, the present invention accurately detects that a noise-like output change has occurred in the output of the throttle opening sensor, and appropriately selects the output of the throttle opening sensor so that the engine output changes rapidly. Therefore, it is expected that the electronic control throttle system can be widely applied to an electronic control throttle system for a vehicle such as a motorcycle.

DESCRIPTION OF SYMBOLS 1 ... Electronic control apparatus for vehicles 2 ... Accelerator opening degree calculation part 3 ... Intake pressure calculation part 4 ... Engine temperature calculation part 5 ... Vehicle speed calculation part 6 ... Engine speed calculation part 7a ... Throttle opening degree calculation part 7b ... Throttle opening degree Calculation unit 8a ... Throttle opening filter value calculation unit 8b ... Throttle opening filter value calculation unit 9a ... Deviation calculation unit 9b ... Deviation calculation unit 10a ... Target throttle opening filter value calculation unit 10b ... Target throttle opening filter value calculation unit DESCRIPTION OF SYMBOLS 11 ... Deviation calculation part 12 ... Throttle opening sensor selection part 12a ... Throttle opening setting part after selection 13 ... Fuel ignition control part 14 ... Target throttle opening calculation part 15 ... Deviation calculation part 16 ... Throttle opening feedback (F / B) Control part 17 ... Motor drive output part 21 ... Accelerator opening sensor 22 ... Intake pressure sensor 23 ... Engine temperature sensor 24 ... Vehicle speed sensor 25 ... Crank sensor 26a, 26b ... Throttle opening sensor E ... Engine M ... Motor T ... Throttle valve S ... Electronic control throttle system

Claims (3)

An electronically controlled throttle system that calculates a target throttle opening and performs feedback control so that the opening of the throttle valve matches the calculated target throttle opening,
A first throttle opening sensor and a second throttle opening sensor for respectively detecting an actual throttle opening which is an actual opening of the throttle valve;
A throttle opening sensor selection unit that selects an output of one of the first throttle opening sensor and the second throttle opening sensor;
The throttle opening sensor selection unit has an output indicating a change direction following the change direction of the target throttle opening among the first throttle opening sensor and the second throttle opening sensor. An electronically controlled throttle system characterized by selecting. The electronically controlled throttle system includes a target throttle opening change amount that is a change amount of the target throttle opening and a first throttle change amount that is detected by the first throttle opening sensor. Calculating an actual throttle opening change amount and a second actual throttle opening change amount that is a change amount of the actual throttle opening detected by the second throttle opening sensor;
The throttle opening sensor selection unit includes a first deviation that is a deviation between the target throttle opening change amount and the first actual throttle opening change amount, the target throttle opening change amount, and the second A second deviation, which is a deviation from the actual throttle opening change amount, is calculated, and the output of the throttle opening sensor corresponding to the smaller one of the first deviation and the second deviation is selected. The electronically controlled throttle system according to claim 1.   The throttle opening sensor selection unit is configured such that the target throttle opening change amount is larger than a predetermined change amount, the first actual throttle opening change amount is equal to or less than a predetermined change amount, and the second actual throttle opening amount is set. When the degree change amount is equal to or less than the predetermined change amount, the first throttle opening sensor and the second throttle opening sensor are selected in the previous selection process by the throttle opening sensor selection unit. 3. The electronically controlled throttle system according to claim 2, wherein the output of the object is selected.

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