JPH03286153A - Engine controller - Google Patents

Abstract

PURPOSE:To obtain the desired acceleration feeling of a vehicle when an accelerator operating part is operated to increase the operating quantity by allowing a throttle valve driving means to carry out control for maintaining the max. allowable opening degree when the opening degree of a throttle valve reaches the max. allowable opening degree. CONSTITUTION:In the operation for increasing the operation quantity of an accelerator operation part, the aimed accelerating speed of a vehicle which corresponds to the increase portion is set, and the max. allowable opening degree of a throttle valve corresponding to the set aimed accelerating speed is set, and when the opening degree of the throttle valve which is increased to achieve the traveling state of the vehicle for an aimed accelerating speed reaches the max. allowable opening degree, the max. allowable opening degree is maintained without increasing the opening degree. Accordingly, when the operation for increasing the operation quantity of the accelerator operation part is carried out, the opening degree of the throttle valve can be increased further, and the vehicle can be accelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention allows the opening of a throttle valve arranged in the intake passage of an engine mounted on a vehicle to be adjusted based on the driving state of the vehicle and the amount of operation of an accelerator operation section. The present invention relates to an engine control device that controls an engine to achieve a target acceleration set accordingly.

(Prior Art) In an engine installed in a vehicle, a throttle valve disposed in an intake passage is mechanically connected to an accelerator operation part such as an accelerator pedal, for example, via a wire cable, etc. A device that opens and closes according to the amount of operation of the operating part is widely used, but apart from such a device, there is an electric actuator that drives the throttle valve located in the intake passage. A throttle valve is also disclosed in JP-A-61-126346, for example, in which a throttle valve is opened and closed by controlling an electric actuator with an accelerator operating part such as an accelerator pedal. It has been proposed as if it were possible. When the throttle valve is driven by an electric actuator, there is an advantage that the opening/closing control mode of the throttle valve can be set relatively freely.

For an engine whose throttle valve is driven by an electric actuator, for example,
As disclosed in Japanese Unexamined Patent Publication No. 63-25355, when the accelerator operation section is operated to increase its operation amount, a target acceleration of the vehicle is determined according to the increase in the operation amount, and the vehicle In order to achieve the target acceleration in the running state of the vehicle, it has been proposed to perform acceleration control using an electric actuator to increase the opening of the throttle valve. Such acceleration control is performed with the intention that when the driver of the vehicle operates the accelerator operation unit to accelerate the vehicle, the acceleration of the vehicle can be obtained in accordance with the driver's request.

(Problem to be Solved by the Invention) In a vehicle in which acceleration control is performed as described above, the target acceleration of the vehicle that is set according to the increase in the amount of operation at the accelerator operation section is compared. When the target is set as the target, even if the amount of operation of the accelerator operation part is not set to the maximum, the opening degree of the throttle valve controlled by the electric actuator is set to the target driving state of the vehicle. As a result of the control to increase the acceleration to achieve it, a situation arises in which the throttle valve is left fully open. Even if an operation is performed to further increase the amount of operation of the accelerator, the vehicle will not be accelerated any further because the throttle valve is already fully open. However, there is an inconvenience in that the expected feeling of acceleration of the vehicle cannot be obtained due to the fact that the acceleration of the vehicle does not start properly, resulting in a strange feeling.

In view of the above, the present invention provides for, when an accelerator operation unit provided in connection with an engine mounted on a vehicle is operated to increase the amount of operation thereof, the amount of the operation of the vehicle is increased according to the increase in the amount of operation. When determining the target acceleration and performing control to increase the opening degree of the throttle valve in order to make the driving state of the vehicle such that the target acceleration is achieved, the operation amount of the accelerator operation part is not set to the maximum. Also, when the throttle valve is fully opened and an operation is performed to further increase the amount of operation of the accelerator operation section,
To provide an engine control device capable of avoiding as much as possible an unnatural state in which the expected acceleration feeling of a vehicle cannot be obtained.

(Means for Solving the Problems) In order to achieve the above-mentioned object, an engine control device according to a first aspect of the present invention, whose basic configuration is shown in FIG. an accelerator operation amount detection means for detecting the operation amount of an accelerator operation section provided in connection with the throttle valve disposed in the intake passage of the throttle valve, a throttle valve drive means for opening and closing the throttle valve, and detecting the opening degree of the throttle valve. a throttle valve opening detection means,
When an increase in the operation amount of the accelerator operation unit is detected by the accelerator operation amount detection means, the target acceleration setting means sets a target acceleration of the vehicle according to the increase in the operation amount. Upper limit throttle valve opening setting means is provided for setting the maximum permissible opening of the throttle valve according to the hundred mark acceleration set, and furthermore, the driving state of the vehicle is set to achieve the target acceleration set by the target acceleration setting means. In order to achieve this, the throttle valve drive means is controlled to increase the opening degree of the throttle valve, and
When the opening of the throttle valve detected by the throttle valve opening detection means reaches the maximum allowable opening, the throttle valve drive control means causes the throttle valve driving means to perform control to maintain the maximum allowable opening of the throttle valve. provided and configured.

Further, as shown in FIG. 2, the engine control device according to the second aspect of the present invention has the configuration of the engine control device according to the first aspect B described above, as well as a throttle control device. The throttle valve opening detecting means detects that the driving state of the vehicle reaches the target acceleration set by the target acceleration setting means by controlling the opening of the throttle valve by the valve driving means to increase the opening of the throttle valve. Acceleration control means is provided for controlling the engine so that when the opening degree of the throttle valve reaches the maximum allowable opening degree, the driving state of the vehicle is such that the target acceleration set by the target acceleration setting means is achieved. Ru.

(Function) In the engine control device according to the first aspect of the present invention configured as described above, when an operation that increases the operation amount of the accelerator operation section is performed, the operation amount of the accelerator operation section increases. The target acceleration of the vehicle is set according to the increase in the throttle valve according to the set target acceleration, and the opening degree of the throttle valve is increased to achieve the target acceleration set for the running state of the vehicle. The maximum allowable opening of the throttle valve is set, and when the opening of the throttle valve is increased to achieve the target acceleration in the running state of the vehicle, the opening of the throttle valve is increased to the maximum allowable opening. The maximum allowable opening shall be maintained without increasing the opening.

As a result, the target acceleration of the vehicle is set in accordance with the increase in the amount of operation at the accelerator operation section, and after the opening degree of the throttle valve is increased in order to make the driving state of the vehicle achieve the target acceleration. In this case, the throttle valve is not fully opened, but is opened less than the maximum allowable opening set according to the target acceleration, and the amount of operation of the accelerator operation section is maximized. When the operation amount of the accelerator operation section is further increased after that, the
The throttle valve can further increase its opening to accelerate the vehicle.

Therefore, the target acceleration of the vehicle is set according to the increase in the amount of operation at the accelerator operation section, and as a result, the opening degree of the throttle valve is increased to make the driving state of the vehicle such that the target acceleration is achieved. Even if the operating amount of the operating section is not set to the maximum, the throttle valve is set to the fully open state, and as a result, when an operation is performed that further increases the operating amount of the accelerator operating section, the expected This avoids an unnatural situation in which the feeling of acceleration of the vehicle cannot be obtained.

Further, in the engine control device according to the second aspect of the present invention, a target acceleration of the vehicle is set according to an increase in the amount of operation in the accelerator operation section, and the throttle valve adjusts the running state of the vehicle to achieve the target acceleration. When the opening degree is increased to reach the maximum allowable opening degree, if the vehicle running condition is not yet such that the target acceleration is achieved, the throttle valve is not controlled. Acceleration control means is provided to control the engine to achieve the target acceleration in the driving state of the vehicle. Therefore, even if the operation amount of the accelerator operation section is not set to the maximum, the throttle valve This avoids an unnatural situation in which the expected feeling of acceleration of the vehicle cannot be obtained when the accelerator operation unit is operated to further increase the amount of operation of the accelerator operation unit. At the same time, the driving state of the vehicle will surely achieve the target acceleration.

(Example) FIG. 3 shows an example of an engine control device according to the present invention.
It is shown along with some of the engines to which it was applied.

In FIG. 3, a combustion chamber 13 is formed above a cylinder 12 formed inside an engine body 10 and in which a piston 11 is disposed, and an intake passage 14 and an exhaust passage 15 are connected to the combustion chamber structure 3. ing. In the intake passage 14, air cleaners 16. Air flow meter 17. Compressor 19 of turbocharger 18. An intercooler 21 that cools the intake air pressurized by the compressor 19. Pressure sensor 22. A throttle valve 23 is disposed that is opened and closed in accordance with the operation of the accelerator pedal.
A throttle opening sensor 24 is provided to detect the opening of the throttle valve 23, and an actuator 26, which is configured by a motor, for example, is provided at the other end of the valve shaft to open and close the throttle valve 23. Furthermore, intake passage 1
A portion downstream of the throttle valve 23 at 4 forms a surge tank 25 having a relatively large volume.

A turbine 20 in the turbocharger 18 is disposed in the exhaust passage 15, and a bypass 27 is provided to a portion where the turbine 20 is disposed. Bypass 2
7 is a wastegate valve 29 driven by an actuator 28 having a negative pressure operated diaphragm mechanism.
It is opened and closed by

The pressure operation chamber 28a of the actuator 28 is connected to a pressure introduction passage 30a whose one end is connected to the surge tank 25 in the intake passage 14, and is also connected to a pressure introduction passage 30b via a solenoid valve 32. One end of the introduction passage 30b is connected to the upstream side of the compressor 19 of the turbocharger 18 in the intake passage 14. The solenoid valve 32 is of a normally closed type, and controls the negative pressure from the intake passage 14 introduced through the pressure introduction passage 30b in accordance with the pulse occupancy rate of the pulse forming the drive signal Ca supplied from the control unit 60. The actuator 28 acts on the pressure working chamber 28a of the actuator 28, whereby the actuator 28 drives the wastegate valve 29 to open the bypass 27.

The control unit 60 that supplies the drive signal Ca to the solenoid valve 32 includes an intake passage 14 obtained from the pressure sensor 22.
Detection output signal Sp detecting the pressure in the part between the combiner 19 and throttle valve 23 of the turbo supercharger 18 in , a detection output signal St detecting the opening of the throttle valve 23 obtained from the throttle opening sensor 24, Detection output signal Sb for detecting the acceleration of the vehicle equipped with the engine body IO obtained from the acceleration sensor 36 Detection output signal Sn for detecting the engine rotation speed obtained from the rotation speed sensor 34, accelerator obtained from the accelerator opening sensor 38 A detection output signal Sa indicating the amount of depression of the pedal 39, a detection output signal Sv indicating the traveling speed (vehicle speed) of the vehicle obtained from the vehicle speed sensor 40, and a detection output signal Sv indicating the vehicle running speed (vehicle speed) obtained from the position sensor 42, to the transmission connected to the engine body 10 obtained from the position sensor 42. A detection output signal Ss detecting the shift position of the provided shift lever
, and a detection output signal group S that detects other operating conditions of the engine body 10 such as the temperature of the cooling water in the engine body IO.
x is also supplied.

The control unit 60 supplies a drive signal cb to the actuator 26 that opens and closes the throttle valve 23 based on these various detection output signals, and performs acceleration control to accelerate the vehicle with an acceleration corresponding to the amount of depression of the accelerator pedal 39. At the same time, a drive signal Ca is supplied to the solenoid valve 32 to control the wastegate valve 29 and perform supercharging pressure control to control the supercharging pressure by the turbo supercharger 18.

The control unit 60 also includes an accelerator pedal 3 on the horizontal axis.
The accelerator pedal depression amount-target acceleration characteristic diagram as shown in FIG. A plurality of characteristic diagrams, including a vehicle speed-reference accelerator opening characteristic diagram as shown in FIG. 5, in which reference accelerator opening degrees A and B are plotted on the vertical axis, are stored in the built-in memory as data maps. has been done.

Under such circumstances, when performing the above-mentioned acceleration control, the control unit 60 determines the amount of depression of the accelerator pedal 39 based on the detection output signal Sa obtained from the accelerator opening sensor 38 when the accelerator pedal 39 is depressed. The gear position in the transmission mechanism is detected based on the shift position of the shift lever when the detection output signal Ss obtained from the position sensor 42 is detected. Then, the detected gear position in the transmission mechanism section is compared with the accelerator pedal depression amount-target acceleration characteristic diagram as shown in FIG. 4, and acceleration lines a, b, c, d, .
...Choose one of them.

Next, the detected amount of depression of the accelerator pedal 39 is compared with the selected acceleration line, and a corresponding target acceleration GT is determined.

Further, based on the detection output signal Sa obtained from the accelerator opening sensor 38, the opening Abl just before the accelerator pedal 39 is depressed and the opening Ab2 after the accelerator pedal 39 is depressed are detected, and the opening degrees Abl and Ab2 are calculated as shown in FIG. Vehicle speed as shown in -
In the standard accelerator opening characteristic diagram, each characteristic line X for the vehicle in which the engine body 10 is mounted is compared as the standard accelerator opening, and the vehicle speed v1 corresponding to the opening Abl is determined.
and a target vehicle speed ■2 corresponding to the opening degree Ab2.

Note that the characteristic line X varies depending on the characteristics, performance, driving environment, etc. of the vehicle.

Next, the target acceleration GT9 obtained based on the accelerator pedal depression amount-target acceleration characteristic diagram shown in FIG. 4 is controlled so that hunting of the throttle valve 23 is prevented and the vehicle is smoothly accelerated. In order to achieve this, the effective target acceleration GN is determined by correction based on the following equation (1).

GNLl=Ka(GTn GNn-+)+Kb(G
Tl, GNfi-+ GT++-+ + GN-2)
+GNll-1... (1) However, Ka and Kb are constants, GN, is the latest one among the already calculated effective target accelerations, and GN7-2 is G
The effective target acceleration obtained just before N −+, GT
, , is the target acceleration, and GT, , -, is the target acceleration determined immediately before GT, . The constants Ka and Kb have different responsiveness depending on the gear position. For example, in a relatively low gear position, Ka and Kb are set to large values to increase the responsiveness.

Next, based on the calculated effective target acceleration GN and the actual acceleration GO of the vehicle at that time, the following formula (
2), calculate the effective throttle opening TH,.

TI(n −Kl ' En 10Kp(ERElll −
+) + TFIn -I...(2) However, Ki and Kp are constants, E, = GN-GO, and E□1 is the difference between the already determined effective target acceleration and the actual acceleration of the vehicle. This is the latest of the differences.

Then, in order to make the opening degree of the throttle valve 23 match the effective throttle opening degree TH obtained as described above,
A drive signal cb is sent to the actuator 26 that drives the throttle valve 23. As a result, acceleration control is performed in which the vehicle is accelerated so that its running state achieves the effective target acceleration GN7.

Also, during such acceleration control, the effective target acceleration G
N, is stored as a data map in the memory built into the control unit 60, and the horizontal axis represents the effective target acceleration GN.
is taken, and the maximum permissible opening TM is plotted on the vertical axis, and compared with the characteristic line Y in the effective target acceleration-maximum permissible opening characteristic diagram shown in FIG. 6, the maximum permissible opening TM is determined. .

seek. Subsequently, when the detection output signal St is detected, the opening degree of the throttle valve 23, which increases in response to the drive signal cb, is compared with the maximum allowable opening degree TMn.

Further, the target vehicle speed (2) corresponding to the opening degree Ab2 determined based on the vehicle speed-reference accelerator opening characteristic diagram in FIG. 5 is compared with the actual vehicle speed at which the detection output signal Sv occurs.

Then, the opening degree of the throttle valve 23 is the maximum allowable opening degree TM,
and as long as the actual vehicle speed is equal to or less than the target vehicle speed V2, the drive signal cb continues to be sent to the actuator 26. Further, when the opening degree of the throttle valve 23 is set to be the maximum allowable opening degree TMn or less and the actual vehicle speed or the target vehicle speed 2 is reached, the sending of the drive signal cb to the actuator 26 is stopped and the acceleration is increased. End control. Furthermore, before the actual vehicle speed reaches the target vehicle speed V2, the opening degree of the throttle valve 23 reaches the maximum allowable opening degree TM,
, the detection output signal sb obtained from the acceleration sensor 36 is compared with the actual acceleration GO of the vehicle and the effective target acceleration GNn, and it is determined that the actual acceleration Go has reached the effective target acceleration GN, . If so, the actuator 26 has the opening degree of the throttle valve 23 at that time,
That is, a drive signal cb is sent to maintain the maximum allowable opening TM, and this is continued until the actual vehicle speed reaches the target vehicle speed V2. Thereafter, when the actual vehicle speed or the target vehicle speed V2 is reached, the drive signal c to the actuator 26 is
Stop sending out b and end acceleration # control. On the other hand, if the actual acceleration Go has not reached the effective target acceleration GN, . cb is delivered and supercharging pressure control is started.

In boost pressure control, effective target acceleration GN.

Based on the actual acceleration GO of the vehicle at that time, the pulse occupation rate DT for the drive signal Ca is calculated according to the following equation (3).

DT, 1===KO・EFI 10KQ(Ell En
−+)+DTn−+・・・・・(3) However, Ko and Kq are constants, and DT, l− are the latest ones of the already calculated pulse occupancies.

Then, a drive signal Ca consisting of pulses having the calculated pulse occupation rate DT is formed and supplied to the solenoid valve 32. Thereby, the solenoid valve 32 connects the actuator 28 to the pressure operation chamber 28a from the surge tank 25 provided in the intake passage 14 through the pressure introduction passage 3.
The wastegate valve 29 is bypassed 27 until the boost pressure supplied through 0a reaches a higher value depending on the pulse occupancy DT of the pulses forming the drive signal Ca.
The device performs the same action as if it were not in an open state. As a result, the supercharging pressure supplied to the cylinder 12 through the intake passage 14 by the turbo supercharger 18 is increased, thereby increasing the output of the engine body 10 and accelerating the vehicle. Become.

Such boost pressure control is performed until the actual acceleration Go reaches the effective target acceleration GN, and when the actual acceleration GO reaches the effective target acceleration GN, the drive signal Ca is
The supply to the solenoid valve 32 is stopped, and the supercharging pressure control is ended.

By controlling the boost pressure in this way, if the opening of the throttle valve 23 reaches the maximum allowable opening TM before the actual acceleration GO reaches the effective target acceleration GN, the turbo By increasing the supercharging pressure by the supercharger I8, the output of the engine body 10 is increased without increasing the opening degree of the throttle valve 23, thereby increasing the opening degree of the throttle valve 23 to the maximum allowable opening degree TM.
Even after reaching , the actual acceleration GO is made to reach the effective target acceleration GNfi.

Therefore, even when acceleration control is performed due to the accelerator pedal 39 being depressed, the throttle valve 2
3, the opening degree is not set to the full open state, leaving room for the opening degree to be further increased in accordance with, for example, subsequent depression of the accelerator pedal 39.

The control unit 60 that performs the above-mentioned control is configured using a microcomputer, and an example of a program executed by such a microcomputer when performing acceleration control will be described with reference to the flowchart in FIG. explain.

In the flowchart in FIG. 7, after the start, various detection output signals are taken in at step 41, and it is determined at the subsequent step 42 whether or not the accelerator pedal 39 has been depressed. If the accelerator pedal 39 is not depressed, the process returns to step 41 and again,
When the accelerator pedal 39 is depressed, in step 43, based on the detection output signal Sa obtained from the accelerator opening sensor 38, the opening Abl of the accelerator pedal 39 immediately before it is depressed and the opening Ab2 after it is depressed are determined. The opening Ab2 is compared with the characteristic line X for the vehicle in which the engine main body IO is mounted in the vehicle speed-reference accelerator opening characteristic diagram shown in FIG. A target vehicle speed V2 corresponding to the degree Ab2 is determined.

Subsequently, in step 44, it is determined whether the actual vehicle speed ■○ obtained from the detection output signal Sv obtained from the vehicle speed sensor 40 is equal to or higher than the target vehicle speed V2, and the actual vehicle speed V○ is determined.
is less than the target vehicle speed V2, in step 45, the detection output signal Sa obtained from the accelerator opening sensor 38 is detected. The gear position detected based on the shift position of the shift lever and the amount of accelerator pedal depression as shown in FIG.
Based on the target acceleration characteristic diagram, the target acceleration GT is determined, and further, in step 46, the effective target acceleration GN is calculated using the formula (1): GN, =Ka(GT-GN,
1-+ ) +Kb(GT-GNR-I GT-I
Calculated based on 10 GN--z) + GN,,-+.

Furthermore, in step 47, the effective throttle opening T
H,, is represented by the formula (2): T)I, =Ki-E, +
Kp(E,.

Calculated based on E,,-+) + Tl(,-+,
Next, in step 48, the maximum allowable opening TM is determined based on the effective target acceleration GN and the effective target acceleration-maximum allowable opening characteristic diagram as shown in FIG. Subsequently, in step 49, the effective throttle opening TH
, is larger than the maximum allowable opening TM7. If the effective throttle opening TH, is greater than the maximum allowable opening TM, in step 50, the effective throttle opening TH7 is made equal to the maximum allowable opening TM, the process proceeds to step 51, and step 49 If the effective throttle opening THfi is less than or equal to the maximum allowable opening TM, the process directly proceeds to step 51.

In step 51, the actual throttle opening T○ detected by the detection output signal St from the throttle opening sensor 24 is the effective throttle opening TH.

Determine whether or not the above is true. As a result, the actual throttle opening To is the effective throttle opening TH.

If the drive signal cb is less than
and returns to step 41.

Further, as a result of the determination in step 51, if the actual throttle opening TO is equal to or greater than the effective throttle opening TH, the process proceeds to step 53, and the pulse occupation rate DT for the drive signal Ca is calculated using equation (3): DT =KO-EI, +
Kq(Efi −Er+−1)+DTn−1, and in the subsequent step 54, the pulse occupancy rate DT
, , a drive signal Ca formed by a pulse having
It is sent to the solenoid valve 32 that drives the wastegate valve 29, and the process returns to step 41.

Furthermore, if it is determined in step 44 that the actual vehicle speed V○ has become equal to or higher than the target vehicle speed v2, then in step 55 the transmission of the drive signal Ca or cb is stopped, and then the process returns to step 41.

(Effects of the Invention) As is clear from the above description, according to the engine control device according to the present invention, when an operation that increases the amount of operation of the accelerator operation section is performed, the amount of operation of the accelerator operation section increases. When setting the target acceleration of the vehicle according to the set target acceleration and increasing the opening degree of the throttle valve to achieve the target acceleration set for the running condition of the vehicle, the maximum throttle valve opening according to the set target acceleration is set. The permissible opening is set and the opening of the throttle valve is increased in order to make the vehicle running condition achieve the target acceleration.When the opening of the throttle valve reaches the maximum permissible opening, the opening of the throttle valve is further increased. Therefore, the target acceleration of the vehicle is set according to the increase in the amount of operation at the accelerator operation part, and the throttle valve is assumed to adjust the running state of the vehicle to achieve the target acceleration. Even after the opening is increased as much as possible, the throttle valve is not fully opened, but remains open less than the maximum allowable opening set according to the target acceleration. , when the operation amount of the accelerator operation section is not set to the maximum and then an operation is performed to further increase the operation amount of the accelerator operation section, correspondingly,
The throttle valve can further increase its opening to accelerate the vehicle.

Therefore, the target acceleration of the vehicle is set according to the increase in the amount of operation at the accelerator operation section.1. As a result of increasing the opening degree of the throttle valve in order to make the driving state of the vehicle achieve the target acceleration, the throttle valve is fully opened even when the operation amount of the accelerator operation part is not set to the maximum. To avoid an unnatural situation in which the expected acceleration feeling of the vehicle is not obtained when an operation is performed to further increase the operation amount of the accelerator operation section. become.

Further, according to the engine control device according to the present invention, the target acceleration of the vehicle is set according to the increase in the amount of operation at the accelerator operation section, and the throttle valve adjusts the running state of the vehicle to achieve the target acceleration. When the opening is increased to reach the maximum allowable opening, if the vehicle's running state is not yet such that the target acceleration is achieved, the vehicle's running state is increased without controlling the throttle valve. Since an acceleration control means is provided to control the engine so that the target acceleration is achieved, even if the operation amount of the accelerator operation section is not set to the maximum, the throttle valve is kept fully open. As a result, when an operation is performed to further increase the amount of operation of the accelerator operation part, an unnatural situation in which the expected acceleration feeling of the vehicle is not obtained is avoided, and the running of the vehicle is The state will be ensured to achieve the target acceleration.

[Brief explanation of the drawing]

2 is a basic configuration diagram showing the engine control device according to the present invention, and FIG.
FIG. 4 is a schematic configuration diagram showing an example of the engine control device according to the present invention together with the main parts of the engine to which it is applied;
5 and 6 are characteristic diagrams used to explain the operation in the example shown in FIG. 3, and FIG. 7 is a characteristic diagram for explaining the operation in the example shown in FIG. 2 is a flowchart showing an example of a program executed by such a microcomputer. In the figure, 10 is the engine body, 18 is the turbo supercharger, 23
26 is an actuator, 29 is an actuator, 32 is a solenoid valve, 39 is an accelerator pedal, and 60 is a control unit.

Claims (1)

[Scope of Claims] 1. Accelerator operation amount detection means for detecting the operation amount of an accelerator operation section provided in connection with a throttle valve disposed in an intake passage of an engine mounted on a vehicle; and opening/closing of the throttle valve. throttle valve driving means for detecting the opening degree of the throttle valve; throttle valve opening detection means for detecting the opening degree of the throttle valve; and when an increase in the operation amount of the accelerator operation section is detected by the accelerator operation amount detection means, the operation amount a target acceleration setting means for setting a target acceleration of the vehicle according to an increase in the amount of the vehicle; and an upper limit throttle valve opening for setting a maximum permissible opening of the throttle valve according to the target acceleration set by the target acceleration setting means. degree setting means; controlling the throttle valve driving means to increase the opening degree of the throttle valve in order to set the running state of the vehicle to achieve the target acceleration set by the target acceleration setting means; A throttle that causes the throttle valve driving means to control the throttle valve to maintain the maximum allowable opening when the opening of the throttle valve detected by the throttle valve opening detecting means reaches the maximum allowable opening. An engine control device comprising: a valve drive control means; 2. Accelerator operation amount detection means for detecting the operation amount of an accelerator operation section provided in connection with a throttle valve disposed in an intake passage of an engine mounted on a vehicle; and throttle valve drive means for opening and closing the throttle valve. and a throttle valve opening degree detection means for detecting the opening degree of the throttle valve; and when an increase in the operation amount of the accelerator operation section is detected by the accelerator operation amount detection means, a throttle valve opening detection means for detecting the opening degree of the throttle valve; a target acceleration setting means for setting a target acceleration of the vehicle; and an upper limit throttle valve opening setting means for setting a maximum permissible opening of the throttle valve according to the target acceleration set by the target acceleration setting means; Controlling the throttle valve driving means to increase the opening degree of the throttle valve in order to achieve the target acceleration set by the target acceleration setting means in the running state of the vehicle, and detecting the throttle valve opening degree. Throttle valve drive control means for causing the throttle valve drive means to control the throttle valve to maintain the maximum allowable opening when the opening of the throttle valve detected by the means reaches the maximum allowable opening; By controlling the opening of the throttle valve by the throttle valve driving means to increase the opening of the throttle valve, the throttle valve opening is detected before the running state of the vehicle reaches the target acceleration set by the target acceleration setting means. When the opening of the throttle valve detected by the means reaches the maximum allowable opening, the engine is controlled so that the running state of the vehicle achieves the target acceleration set by the target acceleration setting means. An engine control device comprising: acceleration control means;