JP4474174B2 - Electronically controlled throttle device - Google Patents

Description

  The present invention relates to an electronically controlled throttle device that sets a target torque according to an accelerator opening and an engine operating state and sets a target throttle opening of an electronic throttle valve that generates the target torque.

  Conventionally, as this type of electronically controlled throttle device, a technique is known in which the accelerator opening is electrically detected and the throttle valve opening is electrically controlled in accordance with the amount of depression.

  The electronically controlled throttle device basically sets the torque required by the driver based on the accelerator opening and the engine speed, sets the target throttle opening based on the required torque, and sets the target throttle opening to A technology that opens and closes the electronic throttle valve with a corresponding drive signal, detects the actual opening of the electronic throttle valve with a throttle opening sensor, and performs feedback control so that the electronic throttle valve converges to the target throttle opening Many have been adopted.

For example, Japanese Patent Laid-Open No. 2002-195077 discloses that a shock caused by a torque step is generated without changing the acceleration speed at the time of start by changing the torque transition speed at the time of start according to the magnitude of the accelerator opening. A technique for suppressing the above is disclosed.
JP 2002-195077 A

  However, since the technology disclosed in Patent Document 1 is controlled so that the transition speed of the target driving force becomes faster as the accelerator opening is larger, when the accelerator pedal is greatly depressed, such as when starting. Although it can be controlled with a certain level of responsiveness, it is delayed until the driving force is generated after the accelerator operation because the accelerator pedal is only slightly depressed when driving in the vicinity of idle speed, such as in traffic jams. Is likely to occur, giving the driver a sense of rattling.

  In order to cope with this, for example, it is conceivable to change the responsiveness by making the accelerator opening and the throttle opening correspond to each other at 1: 1, but even when the accelerator pedal is depressed slightly, it responds sensitively. As a result, a shock due to a torque step is likely to occur, which causes discomfort to the driver.

  In view of the above circumstances, the present invention can obtain a sharp acceleration performance by changing the accelerator opening quickly even if the accelerator opening is small, and does not give the driver a feeling of rattling. An object of the present invention is to provide an electronically controlled throttle device capable of reducing the torque shock caused by the torque step and obtaining good running performance when the accelerator opening is gradually changed.

The first electronic control throttle device according to the present invention for achieving the above object, a required torque setting means for setting a torque required to the engine based on the engine operating state and the accelerator opening per calculation cycle, the accelerator opening an accelerator opening speed setting means for setting the accelerator opening speed based on the amount of change, and the target torque setting means for setting a goal torque by limiting the change of the required torque according to the accelerator opening speed, the target torque Target throttle opening setting means for setting the target throttle opening of the electronic throttle valve so that is generated, and the target throttle opening setting means controls the electronic throttle valve so as to converge to the target throttle opening. It is characterized by controlling .

A second electronic control throttle device, the required torque setting means for setting a torque required by the engine in each operation cycle based on the engine operating state and the accelerator opening, the accelerator opening based on the amount of change in the accelerator opening An accelerator opening speed gain setting means for setting a speed gain, a target torque setting means for setting a target torque by limiting a change in the required torque according to the accelerator opening speed gain, and the target torque are generated. Target throttle opening setting means for setting a target throttle opening of the electronic throttle valve, and the target throttle opening setting means controls the electronic throttle valve so as to converge to the target throttle opening. To do.

According to the present invention, even in the accelerator opening is not small, and it is possible to obtain a sharp acceleration performance be changed quickly the accelerator opening degree, without causing a feeling of sluggish to the driver, whereas the accelerator When the opening degree is gradually changed, it is possible to alleviate the torque shock caused by the torque step and to obtain good traveling performance.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an electronically controlled throttle device.

  As shown in the figure, an electronically controlled throttle device (ETC) includes an electronic throttle 2 provided in the throttle body 1, a control unit (ECU) 3 for controlling the electronic throttle 2, and an accelerator pedal 4a. And a pedal module 4. Further, the accelerator pedal module 4 is provided with an accelerator opening sensor 6 for detecting the depression amount (accelerator opening) of the accelerator pedal 4a. A representative example of the accelerator opening sensor 6 is a potentiometer.

  Further, the throttle valve 5 as an electronic throttle valve interposed in the throttle body 1 and the accelerator pedal module 4 are not mechanically connected to each other, and the throttle valve 5 is operated by the rotation of a throttle actuator 2a provided therewith. The opening is controlled. The throttle actuator 2a includes an electric motor and a hydraulic motor.

  The throttle valve 5 is connected to a throttle opening sensor 2b that detects the actual throttle opening of the throttle valve 5. The throttle opening sensor 2b may be a non-contact type sensor having a magnet, a non-contact type Hall IC disposed inside the magnet, and a stator for concentrating the magnetic flux on the Hall IC. good. In this non-contact type sensor, when the throttle valve 5 rotates, the magnet rotates integrally with the throttle valve 5, and an electromotive force is generated when the magnetic sensing surface of the Hall IC relatively passes through the magnetic field of the magnet. .

  The control unit (ECU) 3 is a computer such as a microcomputer provided with a CPU, ROM, RAM, etc., and an accelerator opening sensor 6 is connected to the input side of the ECU via an A / D converter 8. At the same time, a throttle opening sensor 2 b is connected via an A / D converter 9.

  The ECU 3 detects the actual opening (actual throttle opening) of the throttle valve 5 based on the output signal from the throttle opening sensor 2b. It should be noted that on the input side of the ECU 3, the engine operating state such as an engine speed signal indicating the engine speed output from a crank angle sensor (not shown), a cooling water temperature signal indicating the cooling water temperature detected by the water temperature sensor, and the like. The signal shown is input.

  On the other hand, a throttle actuator 2 a is connected to the output side of the ECU 3 via a drive circuit 10.

  When the driver depresses the accelerator pedal 4a, a signal (accelerator opening signal) proportional to the depression amount (accelerator opening) of the accelerator pedal 4a from the accelerator opening sensor 6 to the ECU 3 via the A / D converter 8 Is output.

  In the ECU 3, a torque (hereinafter referred to as a torque) requested by the driver to the engine via the accelerator pedal 4a based on the accelerator opening degree θa set based on the accelerator opening signal and the engine speed Ne set based on the engine speed signal. Tq (referred to as “accelerator required torque”) is set, and a difference (hereinafter referred to as “torque difference”) ΔTq between the accelerator required torque Tq and the accelerator required torque Tq (n−1) calculated during the previous calculation is set to In addition to the calculated target torque Te (n−1), the target torque Te to be obtained from the current engine is set (Te = Te (n−1) + ΔTq).

  Then, a target throttle opening degree θte corresponding to the target torque is set. Meanwhile, the actual throttle opening (hereinafter referred to as “actual throttle opening”) θth of the throttle valve 5 is read, and feedback control is performed so that the actual throttle opening θth converges to the target throttle opening θte.

  FIG. 2 is a functional block diagram showing throttle opening control of the electronically controlled throttle device executed by the ECU 3. The throttle opening control function includes an accelerator required torque setting unit 21 as a required torque setting unit, a basic value setting unit 22, an accelerator opening gain setting unit 23, an accelerator opening speed gain setting unit 24 as an accelerator opening speed gain setting unit, Torque change amount limit value calculation unit 25 as a torque change amount limit value setting unit, storage unit 26, torque difference calculation unit 27 as a torque difference calculation unit, torque limit value setting unit 28 as a torque limit value setting unit, target torque A target torque setting unit 29, an actual throttle opening detection unit 30, and a target throttle opening setting unit 31 are provided as setting means.

  The accelerator request torque setting unit 21 sets the accelerator request torque Tq with reference to the accelerator request torque map based on the accelerator opening θa and the engine speed Ne. Although not shown, the accelerator request torque map is such that the throttle valve 5 opens at approximately 1: 1 with respect to the increase in the accelerator opening θa and the engine speed Ne, that is, f (Tq) = θa · The accelerator request torque Tq that satisfies Ne is stored.

  Accordingly, when the accelerator opening degree θa changes suddenly, the accelerator request torque Tq also increases correspondingly. However, even if the accelerator opening degree θa fluctuates greatly, the torque output from the engine does not increase suddenly, so the response is rejected. Gets worse. On the other hand, when the accelerator opening θa is suddenly changed to about 30 to 50% of the whole, the engine torque is suddenly changed and a shock due to a torque step is likely to occur.

  Therefore, the torque limit value setting unit 28 monitors the amount of change (torque difference ΔTq) for each calculation cycle (50 ms in this embodiment) of the accelerator required torque Tq. If this amount of change is large, the torque limiter is activated. By limiting the target torque Te set by the target torque setting unit 29, response deterioration and occurrence of shock due to torque steps are suppressed.

  Further, in the basic value setting unit 22, the accelerator opening gain setting unit 23, the accelerator opening speed gain setting unit 24, and the torque change amount limit value calculation unit 25, an accelerator required torque setting unit during transient operation (particularly during acceleration operation). A torque change amount limiting value ΔKq for limiting the accelerator required torque Tq set at 21 is calculated. Limiting the accelerator required torque Tq that is set during transient operation with the torque change amount limit value ΔKq can alleviate the torque shock due to sudden torque change and eliminate the feeling of backlash due to response delay after accelerator operation. Can do.

  Hereinafter, functions of the setting units 22 to 25 will be described. The basic value setting unit 22 sets the torque limit basic value Kq [Nm] by referring to the torque limit basic value table with interpolation calculation based on the engine speed Ne and the gear position Pg of the transmission unit (not shown). . The present embodiment can be applied to both automatic transmission (A / T) vehicles and manual transmission (M / T) vehicles. The gear position Pg is detected based on the gear position signal set based on the driving state in the ECU 3 in the A / T vehicle, and is detected based on the gear position signal output from the shift position sensor in the M / T vehicle.

  FIGS. 3 to 7 illustrate torque limit basic value tables set for each of the first to fifth gear positions Pg of a vehicle equipped with a forward five-speed transmission. The torque limit basic value Kq [Nm] stored in each torque limit basic value table is obtained by experiments or the like, and the torque limit basic value Kq [Nm] corresponding to the engine speed Ne for each gear position. ] Is set.

  The torque limit basic value Kq [Nm] is used to correct the accelerator required torque Tq for each gear position Pg so that the engine torque can be smoothly raised at each gear position Pg. In addition, a torque limit basic value Kq [Nm] that is gradually increased as the engine is shifted from the low engine speed region to the high engine speed region is set.

  The accelerator opening gain setting unit 23 refers to the accelerator opening gain table with interpolation calculation based on the accelerator opening θa and the gear position Pg, and performs accelerator processing according to the accelerator opening θa. Set the gain Kθg [PHY].

  FIGS. 8 to 12 illustrate an accelerator opening gain table set for each gear position Pg of the first to fifth gears. The accelerator opening gain Kθg [PHY] stored in each accelerator opening gain table is obtained by experiments or the like, and the accelerator opening gain Kθg [[gamma] corresponding to the accelerator opening θa for each gear position Pg. PHY] is set. As shown in each figure, when the accelerator pedal 4a is not opened, the accelerator opening gain Kθg is set to about 0.5 to 0.75 [PHY], and the accelerator opening θa is about 1.0 [ PHY]. Accordingly, the accelerator opening gain Kθg set between the accelerator pedal 4a being released and the accelerator opening θa being as small as about 10 [deg] is a reduction coefficient.

  Note that the increase rate of the accelerator opening gain Kθg corresponding to the accelerator opening θa is the largest in the accelerator opening gain table (see FIG. 8) when the gear position Pg is the first speed, and the gear position Pg is 2 to 5 The accelerator opening gain table at the time of speed (see FIGS. 9 to 12) shows almost the same increase rate. Therefore, the accelerator opening gain table for the second to fifth gears can be shared.

  The accelerator opening speed gain setting unit 24 refers to the accelerator opening speed gain table with interpolation calculation based on the accelerator opening speed (change amount of the accelerator opening θa per calculation cycle) Δθa [deg / ms], and opens the accelerator opening. The speed gain Kdθa [PHY] is set. As shown in FIG. 13, the accelerator opening speed gain table stores an accelerator opening speed gain Kdθa that increases as the accelerator opening speed Δθa [deg / ms] increases. That is, when the accelerator opening degree θa is constant, such as constant speed running, Δθa = 0, and the accelerator opening speed gain Kdθa at this time is set to 1.0.

  In this embodiment, since the processing is performed with a calculation cycle of 50 ms, the accelerator opening speed Δθa is calculated every 50 ms. Since the accelerator opening speed Δθa is a temporal change amount of the accelerator opening degree θa, even when the accelerator opening degree θa is small, if the change amount per unit time is large, a large value of the accelerator opening speed gain Kdθa is obtained. Is set.

  The torque change amount limit value calculation unit 25 uses the torque limit basic value Kq [Nm] set by the basic value setting unit 22 as the accelerator opening gain Kθg [PHY] set by the accelerator opening gain setting unit 23 and the accelerator opening speed. The torque change amount limit value ΔKq is calculated by correcting with the gain Kdθa [PHY].

ΔKq = (Kq · Kθg) · Kdθa (1)
A value obtained by multiplying the torque limit basic value Kq and the accelerator opening gain Kθg is the basic change amount limit value.

By the way, as described above, when the accelerator opening degree θa is constant, such as at a constant speed, the accelerator opening speed gain Kdθa is set to 1.0 (see FIG. 13).
ΔKq = Kq · Kθg (1 ′)
It shows the same value as the basic variation limit value. Therefore, the torque change amount limit value ΔKq is a value in which the accelerator opening speed gain Kdθa is added only during a transient operation such as an acceleration operation, and the response at the transient time is improved. Even when the accelerator opening θa is gradually changed, the accelerator opening speed Δθa shows a value of 0 or more, so the accelerator opening speed gain Kdθa is also 1.0 or more, and the torque change amount limit value ΔKq is slightly increased. The

  The storage unit 26 temporarily stores the calculation result. The previous accelerator request torque Tq (n-1) set by the accelerator request torque setting unit 21 and the previous time set by the target throttle opening setting unit 31 to be described later. The basic throttle opening θp (n−1) and the like are stored.

  The torque difference calculation unit 27 is a torque difference ΔTq () which is a difference between the accelerator request torque Tq set by the accelerator request torque setting unit 21 and the previous accelerator request torque Tq (n−1) stored in the storage unit 26. ΔTq = Tq−Tq (n−1)) is calculated.

  The torque limit value setting unit 28 compares the torque difference ΔTq calculated by the torque difference calculation unit 27 with the torque change amount limit value ΔKq calculated by the torque change amount limit value calculation unit 25, and selects any smaller value. Then, the selected value is set as the torque limit value KTe. The torque limit value KTe has a function as a torque limiter.

  The target torque setting unit 29 sets the target torque Te by adding the torque limit value KTe set by the torque limit value setting unit 28 to the previous accelerator request torque Tq (n−1) stored in the storage unit 26. To do.

  Te = Tq (n-1) + KTe (2)

  Therefore, when ΔTq> ΔKq, the target torque Te increases by the torque change amount limit value ΔKq. On the other hand, the target torque Te when ΔTq <ΔKq is increased by the torque difference ΔTq. In steady operation with a small change in the accelerator opening θa, the torque difference ΔTq becomes ΔTq≈0, and the torque difference ΔTq acts as a torque limiter. Therefore, the target torque Te is the previous accelerator request torque Tq (n−1). Almost the same value.

  On the other hand, when the accelerator opening degree θa is largely varied, the torque difference ΔTq shows a large value, and thus ΔTq> ΔKq, and the torque change amount limit value ΔKq acts as a torque limiter.

  By the way, when the accelerator opening degree θa is varied within a small range of about 0 to 10 [deg}, the accelerator required torque Tq set by the accelerator required torque setting unit 21 increases according to the change in the accelerator opening degree θa. Therefore, when the target torque Te is calculated by adding the torque difference ΔTq to the previous accelerator required torque Tq (n−1), a torque shock is likely to occur due to a sudden change in torque.

  On the other hand, in such a transient state, the torque change amount limit value ΔKq is a basic change amount limit value that is a product of the torque limit basic value Kq and the accelerator opening gain Kθg without considering the accelerator opening speed gain Kdθa. (Kq · Kθg) is set only, and this torque change amount limit value ΔKq (ΔKq = Kq · Kθg) is added to the previous accelerator required torque Tq (n-1) to calculate the target torque Te. Since the target torque Te is smoothed by the torque change amount limit value ΔKq, as shown by a one-dot chain line in FIG.

  On the other hand, the torque change amount limit value ΔKq calculated in this embodiment is calculated by multiplying the basic change amount limit value (Kq · Kθg) by the accelerator opening speed gain Kdθa as shown in the equation (1). . Since the accelerator opening speed gain Kdθa is a time differential value of the accelerator opening θa, as shown in FIG. 14B, even when the accelerator opening θa changes even when the accelerator opening θa is small. 1.0 [PHY] or higher. This accelerator opening speed gain Kdθa becomes a large value when the change amount of the accelerator opening θa is large, that is, when the accelerator pedal 4a is depressed quickly, and when the change amount is small, that is, when the accelerator pedal 4a is depressed slowly. Small value.

  Therefore, the torque change amount limit value ΔKq calculated based on the equation (1) changes according to the speed even if the accelerator opening θa is small, and thus the driver's intention can be sufficiently reflected. it can. As a result, when the current target torque Te is calculated by adding the torque change amount limit value ΔKq to the previous target torque Te (n−1), as shown in FIG. The engine torque can be raised in an appropriate state in accordance with the driver's intention without the degree θth opening rapidly or without delay.

  Further, the actual throttle opening detection unit 30 detects the actual throttle opening θth of the throttle valve 5 based on the throttle opening signal output from the throttle opening sensor 2b.

  The target throttle opening setting unit 31 sets a basic throttle opening θp corresponding to the target torque Te set by the target torque setting unit 29, and the actual throttle opening θth detected by the actual throttle opening detection unit 30; A feedback correction gain λ is set based on the difference (θth−θp (n−1)) from the previous basic throttle opening θp (n−1) stored in the storage unit 26, and the basic throttle opening θp is set. The target throttle opening θte is set by correcting with the feedback correction gain λ (θe = θp + λ) and output to the drive circuit 10.

  The drive circuit 10 outputs a drive signal corresponding to the target throttle opening degree θte to the throttle actuator 2a to open / close the throttle valve 5 in a predetermined manner.

  Next, an example of throttle opening control executed by the ECU 3 shown in FIG. 2 will be described with reference to a time chart shown in FIG. The time chart shown in the figure shows signal waveforms when the accelerator operation is performed in a range where the accelerator opening θa is as small as 0 to 10 [deg], such as in a traffic jam. Note that the gear position Pg is set to the first speed.

  When the accelerator pedal 4a is depressed shallowly and the vehicle is traveling at a constant speed near the idle speed, the accelerator request torque Tq set by the accelerator request torque setting unit 21 is substantially constant at a low value. The torque Tq and the previous accelerator required torque Tq (n−1)) are Tq≈Tq (n−1). Therefore, the torque difference ΔTq calculated by the torque difference calculation unit 27 is ΔTq≈0.

  On the other hand, in the basic value setting unit 22, since the engine speed Ne is in the vicinity of the idle speed, the torque limit basic value Kq set based on the engine speed Ne and the gear position Pg is as shown in FIG. 1.2 [Nm] is set. Further, the accelerator opening gain Kθg is set in the vicinity of 0.75 [PHY] as shown in FIG. Further, since the accelerator opening θa is a constant value, the accelerator opening speed gain Kdθa is set to about 1.0 [PHY] as shown in FIG.

As a result, the torque change amount limit value ΔKq calculated by the torque change amount limit value calculation unit 25 is calculated from the equation (1):
ΔKq ≒ 1.2 ・ 0.75 ・ 1.0 ≒ 0.9 [Nm]
It becomes.

Therefore, since ΔKq> ΔTq, the torque limit value setting unit 28 sets the torque difference ΔTq calculated by the torque difference calculation unit 27 as the torque limit value KTe (KTe = ΔTq≈0). ,
Since the target torque Te set by the target torque setting unit 29 is set by adding the torque limit value KTe to the previous target torque Te (n−1) (Te = Te (n−1) + KTe), Te ≈Te (n-1), indicating a substantially constant value.

  As described above, when the accelerator pedal 4a is released or the amount of depression of the accelerator pedal 4a is constant, the torque difference ΔTq (≈0) calculated by the torque difference calculation unit 27 functions as a torque limiter, and the torque change amount limit value. The torque change amount limit value ΔKq calculated by the calculation unit 25 is not added to the target torque Te, and the target throttle opening setting unit 31 sets the target throttle based on the target torque Te indicating a substantially constant value. The opening degree θte is set.

  Thereafter, as shown in FIG. 14 (d), when the accelerator pedal 4a is lightly depressed in order to accelerate slightly, the accelerator required torque setting unit 21 is approximately 1: for the accelerator opening θa and the engine speed Ne. 1, the corresponding accelerator required torque Tq is set (f (Tq) = θa · Ne).

  As a result, the torque difference ΔTq calculated by the torque difference calculation unit 27 every calculation cycle (50 ms) is a large value when the accelerator pedal 4a is depressed at a high speed, and a small value when the accelerator pedal 4a is depressed slowly.

  On the other hand, the torque limit basic value Kq set by the basic value setting unit 22 is set based on the gear position Pg and the engine speed Ne, so that even if the accelerator pedal 4a is depressed slightly, the engine speed Until Ne rises, that is, while there is a delay until the driving force is generated, the value before depression of the accelerator pedal 4a (in this embodiment, about 1.2 [Nm]) is maintained.

  Further, as shown in FIG. 8, the accelerator opening gain Kθg set by the accelerator opening gain setting unit 23 increases at a value substantially proportional to the accelerator opening θa.

  Further, the accelerator opening speed gain Kdθa set by the accelerator opening speed gain setting unit 24 is, as shown in FIG. 13, regardless of the depression amount of the accelerator pedal 4a, the accelerator opening detected every calculation cycle (50 ms). Since it is set from the amount of change of θa, it is set to a large value if the depression speed is high. Therefore, as shown in FIGS. 14A and 14B, the gains Kθg and Kdθa immediately after the accelerator pedal 4a is depressed are both increased.

  As a result, the torque change amount limit value ΔKq calculated by the torque change amount limit value calculating unit 25 is a value before depressing the accelerator pedal 4a (in this embodiment, until the engine speed Ne increases according to the equation (1)). , About 1.2 [Nm]), the torque limit basic value Kq is multiplied by the gains Kθg and Kdθa.

  As the engine speed Ne increases, the torque limit basic value Kq increases, so the torque limit basic value Kq relatively increases. Furthermore, as the accelerator pedal 4a is depressed, the accelerator opening speed gain Kdθa increases as shown in FIG. 14B, and the increase rate of the torque change amount limit value ΔKq increases accordingly.

  When the torque limit value setting unit 28 compares the torque difference ΔTq with the torque change amount limit value ΔKq, the torque difference ΔTq is related to the relationship between the accelerator opening θa and the engine speed Ne (f (Tq) = θa · Ne) is a change amount of the accelerator required torque Tq obtained from Ne). On the other hand, the torque change amount limit value ΔKq is an accelerator opening gain Kθg obtained by setting the torque limit basic value Kq based on the change in the accelerator opening θa. Since it is corrected with the accelerator opening speed gain Kdθa, ΔTq> ΔKq.

  As a result, the torque change amount limit value ΔKq functions as a torque limiter, and no torque shock occurs even when the accelerator pedal 4a is operated in a shallow range of about 0 to 10 [deg]. Good driving performance can be obtained without giving a feeling of sluggishness due to drive delay after the accelerator operation.

  When the depression of the accelerator pedal 4a is completed, the accelerator opening speed Δθa becomes 0, so that the accelerator opening speed gain Kdθa becomes 1.0 [PHY], and the torque change amount limit value ΔKq becomes the basic change amount limit value ((1 ' ))). Therefore, even after the depression of the accelerator pedal 4a is completed, it is not necessary to remove the accelerator opening speed gain Kdθa from the arithmetic expression, and the torque change amount limit value ΔKq can be constantly calculated in both transient operation and steady operation. .

  Thus, in the present embodiment, the torque change amount limit value ΔKq is calculated by multiplying the basic change amount limit value (Kq · Kθg) by the accelerator opening speed gain Kdθa set according to the depression speed of the accelerator pedal 4a. Therefore, while the accelerator pedal 4a is being depressed, the target torque Te increases in accordance with the depression speed. Therefore, even when the accelerator opening θa is small, the response is good and the change in the acceleration opening θa is determined. Acceleration can be obtained.

  In addition, since the torque change amount limit value ΔKq acts as a torque limiter, even if the accelerator pedal 4a is stepped on suddenly, the engine torque does not change suddenly, and a torque shock due to a sudden change in engine torque does not occur. be able to.

  In addition, this invention is not restricted to the form mentioned above, For example, this invention is applicable also at the time of deceleration. Further, an accelerator opening speed gain table may be provided for each gear position.

Schematic configuration diagram of electronically controlled throttle device Functional block diagram of electronically controlled throttle device Explanatory drawing of the torque limit basic value table selected when the gear position is 1st gear Explanatory drawing of the torque limit basic value table selected when the gear position is 2nd gear Explanatory drawing of the torque limit basic value table selected when the gear position is the third speed Explanatory drawing of the torque limit basic value table selected when the gear position is 4th gear Explanatory drawing of the torque limit basic value table selected when the gear position is 5th gear Explanatory drawing of accelerator opening gain table selected when gear position is 1st gear Explanatory drawing of accelerator opening gain table selected when gear position is 2nd gear Explanatory drawing of accelerator opening gain table selected when gear position is 3rd gear Explanatory drawing of accelerator opening gain table selected when gear position is 4th gear Explanatory drawing of accelerator opening gain table selected when gear position is 5th gear Explanatory drawing of accelerator opening speed gain table Time chart showing each signal waveform during accelerator operation

Explanation of symbols

2 Electronic throttle 2a Throttle actuator 4a Accelerator pedal 5 Throttle valve 21 Accelerator required torque setting unit 22 Basic value setting unit 23 Accelerator opening gain setting unit 24 Accelerator opening speed gain setting unit 25 Torque change amount limit value calculation unit 27 Torque difference calculation unit 28 torque limit value setting unit 28 torque change amount limit value calculating unit 29 target torque setting unit 31 target throttle opening setting unit Δθa accelerator opening speed ΔKq torque change amount limiting value ΔTq torque difference θa accelerator opening θp basic throttle opening θte target Throttle opening θth actual throttle opening Kθg accelerator opening gain KTe torque limit value Kdθa accelerator opening speed gain Kq torque limit basic value Ne engine speed Pg gear position Te target torque Tq accelerator required torque

Agent Patent Attorney Susumu Ito

Claims (2)

A required torque setting means for setting a torque required by the engine in each operation cycle based on the engine operating state and the accelerator opening,
An accelerator opening speed setting means for setting the accelerator opening speed based on the amount of change in the accelerator opening;
And the target torque setting means for setting a goal torque by limiting the change of the required torque according to the accelerator opening speed,
A target throttle opening setting means for setting a target throttle opening of the electronic throttle valve so that the target torque is generated ;
The electronic control throttle device, wherein the target throttle opening setting means controls the electronic throttle valve so as to converge to the target throttle opening . A required torque setting means for setting a torque required by the engine in each operation cycle based on the engine operating state and the accelerator opening,
An accelerator opening speed gain setting means for setting an accelerator opening speed gain based on the amount of change in the accelerator opening;
Target torque setting means for setting a target torque by limiting a change in the required torque according to the accelerator opening speed gain ;
A target throttle opening setting means for setting a target throttle opening of the electronic throttle valve so that the target torque is generated ;
The electronic control throttle device, wherein the target throttle opening setting means controls the electronic throttle valve so as to converge to the target throttle opening .

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