JPH03182662A - Controller of engine for vehicle - Google Patents

Abstract

PURPOSE:To control driving shaft torque according to acceleration operation by controlling an engine so that a detection engine operation speed is in conformity with a target operation speed according to responsiveness of standard model preriminarily set. CONSTITUTION:A target value of driving shaft torque is set based on acceleration operation by a detection means in a set means E. A target engine operation speed is set by a set means F according to change speed ratio and torque converter output shaft operation speed detected by the detection means A, and detection means B, C. In a control means G, a target engine output torque is set by a set means H so that engine operating speed by a detection means D is in conformity with the target engine operation speed according responsiveness of standard model preriminarily set by a set means K. Intake air quantity is controlled by a control means I based thereon. The driving shaft torque is controlled according to the acceleration operation.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a control device for a vehicle engine.
The present invention relates to a control device for a vehicle engine equipped with a torque converter.

<Prior Art> In view of the fact that with conventional vehicle engine control devices, it is difficult to control the supply of fuel according to the amount of intake air that changes from moment to moment during transient operating conditions, the applicant has developed a vehicle engine control device. The fuel amount and air amount are determined using the engine output shaft torque, which is a physical quantity that directly acts on the engine, as the reference amount for control.
A so-called torque-driven engine control system was previously proposed (see Japanese Patent Application No. 144797/1983).

In the above torque-driven method, a target engine output shaft torque is set according to the amount of accelerator operation, and the intake air amount of the engine is controlled by the throttle valve opening so that the set target engine output shaft torque is actually obtained. The system is configured to adjust according to the following.

<Problems to be Solved by the Invention> As shown in this photo, if such torque-driven engine control is applied directly to a vehicle equipped with a torque converter as a means of transmitting torque to the transformer shaft, the drive shaft torque of the vehicle will not necessarily increase. It may not correspond to the amount of accelerator operation.

For example, suppose you press the accelerator hard when starting.In this case, it is desired that the vehicle acceleration, that is, the drive shaft torque, increases in a responsive manner, but only the engine rotation speed increases in a responsive manner, and the vehicle acceleration It cannot rise immediately. This is because the torque ratio transmitted by the torque converter (input/output shaft torque ratio of the torque converter) is not necessarily 1:1.

In addition, the response characteristics of the drive shaft torque to the amount of accelerator operation depend on the structural characteristics of the engine and torque converter, and it is not possible to freely select response characteristics that suit the various driving conditions of the vehicle. Depending on the situation, undesirable drive shaft torque control may be performed 0 For example, rapidly changing the drive shaft torque during a turn is dangerous as it can cause the vehicle to spin, etc. However, on the engine control side, Since the drive shaft torque is controlled according to the amount of accelerator operation, regardless of the driving condition such as whether or not the vehicle is turning, the driver is advised to operate the accelerator more gently when turning than when driving straight. wanted,
The engine could not be controlled safely in response to the driver's rough accelerator operation.

The present invention was made in view of the above-mentioned g-hard point, and it is possible to control the drive shaft torque of the vehicle according to the amount of accelerator operation even in a vehicle equipped with a torque converter, and also to control the drive shaft torque according to the driving state of the vehicle. An object of the present invention is to provide a control device for a vehicle engine that allows selection of response characteristics.

<Means for Solving the Problems> Therefore, in the present invention, a control device for a vehicle engine equipped with a torque converter is provided as shown in FIG.
It was configured to include G means.

(1) Accelerator operation amount detection means for detecting the accelerator operation amount (B) Gear ratio detection means for detecting the gear ratio in the transmission (C) Torque converter output shaft rotation speed detection means for detecting the output shaft rotation speed of the torque converter (D) Engine rotation speed detection means for detecting the rotation speed of the engine (E) Target drive shaft torque setting means for setting a target value of drive shaft torque based on the detected accelerator operation amount (F) Target drive shaft torque setting means for setting the target value of the drive shaft torque based on the detected accelerator operation amount. Target engine rotation speed setting means (G) for setting a target engine rotation speed to be generated by the engine according to the target drive shaft torque, the detected gear ratio, and the torque converter output shaft rotation speed; Engine rotation speed control means for controlling the engine so that the detected engine rotation speed matches the set target engine rotation speed according to the response characteristic.Here, the engine rotation speed control means G includes the following H , I may be configured.

(H) Target engine output shaft torque setting means (1) for setting a target engine output shaft torque such that the engine rotation speed matches the target engine rotation speed in accordance with the response characteristics of a preset reference model. Intake air amount control means for controlling the intake air amount of the engine based on the target engine output shaft torque; and (J) vehicle running state detection means for detecting the vehicle running state. The drive shaft torque setting means E sets the target drive shaft torque based on the accelerator operation amount detected by the accelerator operation amount detection means A and the vehicle running state detected by the vehicle running state detection means J. It is preferable to configure.

Further, in addition to the above-mentioned vehicle running state detection means J, it is preferable to provide the following means K.

(K) Response characteristic standard model setting means for setting a standard model of engine rotational speed response characteristics based on the detected vehicle driving condition;

It is recommended that at least one of the amount of rainfall, the loaded weight of the vehicle, the uphill/downhill condition of the vehicle, and the wheel load of the vehicle be detected.

<Operation> According to the vehicle engine control device having such a configuration, the target drive shaft torque setting means E is controlled by the accelerator operation amount detection means A.
The target value of the drive shaft torque is set based on the accelerator operation amount detected in the . Further, the target engine rotation speed setting means F sets the gear ratio detected by the gear ratio detection means B, the torque converter output shaft rotation speed detected by the torque converter output shaft rotation speed detection means C, and the target drive shaft torque. A target engine rotation speed to be generated by the engine is set in accordance with the target drive shaft torque set by the setting means E.

The engine rotation speed control means G sets the engine rotation speed detected by the engine rotation speed detection means by the target engine rotation speed setting means F in accordance with the response characteristics of a preset reference model. The engine is controlled to match the target engine speed.

Here, the target engine output shaft torque setting means H sets a target engine output shaft torque such that the engine rotation speed matches the target engine rotation speed in accordance with the response characteristics of a preset reference model, and The control means I controls the intake air amount of the engine based on the target engine output shaft torque set as described above, and these two means H9■ perform the function of the engine rotational speed control means G.

The vehicle running state detection means J detects at least one of the following vehicle running states: steering angle, amount of rainfall, loaded weight of the vehicle, climbing/descending board state of the vehicle, and wheel load of the vehicle. In this case, the target drive shaft torque setting means E sets the target drive shaft torque based on the vehicle running state in addition to the accelerator operation amount.

Further, a response characteristic reference model setting means provided together with the vehicle running state detection means J sets a reference model of the engine rotational speed response characteristic based on the detected vehicle running state.

<Example> The present invention will be explained in detail below.

In FIG. 2 showing the overall configuration of one embodiment, a crank angle sensor 1 serving as an engine rotational speed detection means is attached to, for example, the crankshaft or camshaft of the engine, and a unit signal for each unit crank angle and a reference crank angle are detected. The rotational speed of the engine can be calculated by outputting a reference signal for each unit signal and measuring the number of occurrences of the unit signal within the cycle of the reference signal or within a predetermined time.

The accelerator opening sensor 2 serving as the accelerator operation amount detection means A detects the accelerator opening (accelerator operation amount) Acc operated by the driver based on the output voltage of the potentiometer.

A torque converter output shaft rotation speed sensor 3 serving as torque converter output shaft rotation speed detection means C detects the rotation speed Nt of the output shaft 5 of the torque converter 5 connected to the output shaft of the engine.

Further, the shift position sensor 4 is connected to the torque converter 5.
This sensor detects the shift position (gear position) P of the transformer 1 transmission 6 through which engine torque is transmitted, and detects running resistance and transmission gear ratio (reduction ratio).
It is provided as a sensor for detecting the operating load such as, and corresponds to the gear ratio detection means B in this embodiment.

In addition, a vehicle speed sensor 31 that detects the vehicle speed Vsp, a steering angle sensor 32 that detects the steering angle α of the steering wheel, etc. are provided, and these sensors 31 and 32 correspond to the vehicle running condition detection means J in this embodiment. do. Note that the parameters indicating the running state of the vehicle include the vehicle speed Vsp,
In addition to the steering angle α, in this embodiment, as will be described later, the rainfall MR
1 climbing board, loading weight W9, and wheel load N are used, and a raindrop sensor, an acceleration sensor, a suspension stroke sensor, etc. (not shown) for detecting these running states correspond to vehicle running state detection means. .

The CPU 7, which receives the detection signals from the sensors 1 to 4 and 31.32, and the throttle valve 22 sensor 23 that detects the opening degree θr of the throttle valve 22, executes the program shown in the flowchart of FIG. By performing the corresponding arithmetic processing, a target throttle valve opening θ0 is determined so as to obtain the target drive shaft torque Tor, and this is output to the servo drive circuit 12. 8 is a throttle valve opening degree table necessary for calculation by the CPU 7.

In this embodiment, the CPU 7 includes the target drive shaft torque setting means E, the target engine rotation speed setting means D, the engine rotation speed control means G, and the response characteristic reference model setting means.
Target engine output shaft torque setting means H2 It has a function as an intake air amount control means (2), and performs fuel supply control by outputting fuel injection pulses to the injectors 10 of each cylinder by a known method.

The servo drive circuit 12 includes a throttle sensor 2 that detects the opening degree of a throttle valve 22 installed in an intake passage 21.
3, the actual throttle valve opening θr detected by C
The servo motor 24 connected to the rotating shaft of the butterfly-type throttle valve 22 is driven in forward and reverse directions according to the deviation between the two opening degrees so as to match the target throttle valve opening θ0 output from the PU 7.

Next, the control operation performed by the CPU 7 will be explained according to the program shown in the flowchart of FIG.

The program shown in the flowchart of FIG. 3 is executed every fixed time period (for example, 10 ssec), and in PL-P6, the accelerator opening degree Ace.

Read engine rotation speed Ne, torque converter output shaft rotation speed NL, shift position fP, vehicle speed Vsp, and steering angle α.

In P7, the target drive shaft torque Tor is set.

The target drive shaft torque Tor is determined based on the driver's request (accelerator opening Acc) and the running state of the vehicle (vehicle speed Vs).
p, steering angle α) as follows.

For example, as shown in FIG. 4, the target drive shaft torque is determined based on the magnitude of the steering angle α from among several target drive shaft torque Tor table data predetermined based on the accelerator opening degree Acc and the vehicle speed Vsp. Select a table to look up the torque Tor, and calculate the target drive shaft torque T corresponding to the current vehicle speed Vsp and steering angle α from the selected table.
Look up and set or. In the target drive shaft torque Tor table, the target drive shaft torque Tor is set to decrease more as the vehicle speed Vsp or the steering angle α increases, taking into account the maximum power performance of the vehicle and the stability during turning. be.

Note that, without using the target drive shaft torque Tor table data, the accelerator opening degree A can be calculated using a simple linear formula as shown below.
It is also possible to calculate and set the target drive shaft torque Tor commensurate with c c, vehicle speed Vsp, and steering angle α.

Tor=kl ・2 to Acc- ・To Vsp-: 1lc
In rP8, a reference model H(s) that defines the response characteristics of the drive shaft torque is selected from several preset reference models. In this example, the driving condition (steering angle α)
For example, as shown in FIG. 5, the reference model is selected based on the characteristics of a gradual change as the steering angle α increases, taking into consideration the stability of the vehicle during turning. Conversely, when the steering angle α is small, a reference model with characteristics emphasizing responsiveness is selected.

In P9, first, a target torque converter output shaft torque Ttr is calculated from the gear ratio Gr corresponding to the shift position P and the target drive shaft torque Tor according to the following equation.

T tr = Tor 1 G r Then, the target engine rotation speed is determined from the target torque converter output shaft torque Ttr calculated based on the above formula and the torque converter output shaft rotation speed Nt detected by the torque converter output shaft rotation speed sensor 3. Calculate Ner.

As shown in FIG. 6, the characteristics (torque capacity τ, efficiency η) of the torque converter 5 are the rotation speed ratio of the torque converter input shaft rotation speed (equal to the engine rotation speed Ne) and the torque converter output shaft rotation speed Nt. Nt/N
Since it depends on e, the torque converter output shaft torque Tt
is known to be modeled by the following quadratic equation.

That is, in the non-coupling region, Tt=Ao・Nj2+A+"Nj-Ne+A1Ne"
・・・・・・■ In the coupling region, T t = B o−N t ' + B + ・N
t −N e181N e ”...■ However, in the opening formula, A0 to A, , 80 to B2 are constants specific to the torque converter 5.

In Fig. 6, this is the torque capacity τ (=Tt/Ne
”) using the rotational speed ratio Nt/Ne, Tt/Ne”=Co・(Nt/Ne)”10C+・N
It is expressed as t/N e + C2 (however, from 00 to
(c2 is a constant that determines the bulge of the curve). Therefore, if this equation is rearranged with respect to Tt, the above equation (■) can be obtained.

In addition, in FIG. 6, the efficiency η is Nt −Tt and Ne−
The ratio of Te (Nt-Tt)/(Ne-Te) (however, T
e is human torque).

In the above equation (■), if the engine rotation speed at which the target torque converter output shaft torque Ttr is obtained (target engine rotation speed) is Ner, then Ttr and Ner can be expressed as the above equation (■).
, ■, Ttr=Ao HN t ”+A+ ・N t, -Ne
r+A1Ner"......■ Ttr=Bo+Nt"+B, ・Nt-Ne
r+Bt-Net" - ■ Therefore, by solving the simultaneous equations of ■ and ■ with Ttr and Nt as variables, the target engine rotation speed Ner can be obtained. This target engine rotation speed Ner is determined by the target drive shaft torque Tor, It will be set as a value that reflects the characteristics of the torque converter found using the gear ratio Gr and the torque converter output shaft rotational speed Nt.Incidentally, the pre-calculated values should be entered in the table, and the values at that time Net may be determined by lookup from Ttr and Nt. Therefore, even in an engine equipped with a torque converter, the drive shaft torque can be controlled to match the accelerator operation amount.

In PIO, the actual engine rotation speed Ne is adjusted to the target engine rotation speed Ne set in P9 in accordance with the response characteristics of the reference model H(s) selected based on the steering angle α in P8.
The target engine output shaft torque Ter
Calculate. As a method for deriving the target engine output shaft torque Ter, the well-known lM, C, method (Inter
nal Model ControIMethod
) is used. 1. The M,C,method makes it possible to construct a robust model matching control system, and is effective in controlling the rotational speed of an engine that includes many nonlinear elements and includes a highly variable element such as combustion ( Model matching control = Control that matches the response characteristics of the controlled object with those of a reference model; Robust - The stability of the control system is maintained even if there are some model errors or parameter fluctuations.

In Fig. 7, G (s) is the controlled object (as shown in P11゜PI3 below, the throttle valve opening is controlled based on the target engine output shaft torque, so that the engine output shaft torque follows the target value. GM(s) is a model to be controlled, and C(s) is a feedforward model matching compensator.

C (s) = H (s) / GM (s) However, since Fig. 6 is expressed in a continuous time system, it is actually discretized at the sampling period T (10 msec) to obtain the target engine output shaft torque. Calculate Ter.

For pH, PLO is 1. in Figure 7. From the target engine output shaft torque Ter obtained by the M, C, method and the engine rotational speed Ne at that time, the target throttle valve opening θ is determined with reference to the target throttle valve opening table 8 shown in FIG.

The data given in FIG. 8 that is read out is data determined from the performance of the engine installed in the vehicle.

PI3 is the target throttle valve opening θ. is output to the servo drive circuit 12. As a result, the throttle valve 22 is driven by the servo motor 24, and its opening becomes the target throttle valve opening θ. As a result, the intake air amount is controlled to be such that the target engine output shaft torque Ter, that is, the target engine rotational speed Net is obtained.

Here, PIO to P12 and the servo motor drive circuit 12 shown in FIG. Servo motor 24. The throttle valve 22 and throttle sensor 23 function as the engine rotational speed control means G in FIG. Therefore, in detail, the function of the intake air amount control means I in this embodiment is performed by the CPU 7. Servo motor drive circuit 12. Servo motor 24. They are distantly related to each other by the configurations of the throttle valve 22 and throttle sensor 23.

In this embodiment, the target engine rotational speed Net (target engine output shaft torque Ter, target drive shaft torque T
or), the amount of intake air is controlled by the opening degree of the throttle valve 22, but in addition to this, the target engine rotation speed Net can be obtained by variable control of the amount of fuel supplied to the engine. It's okay.

As another example, an example in which the amount of rainfall R is used as the driving state of the vehicle will be shown below.

That is, the amount of rainfall R in the vehicle driving environment is detected using a rainfall amount sensor (raindrop sensor) not shown, and the target drive shaft torque Tor and the reference model H(s) are determined based on this.

The target drive shaft torque Tor is determined by the driver's request at that time (
Accelerator opening (Acc) and vehicle running condition! ! (Vehicle speed Vsp
, rainfall amount R), look up and set from table data as shown in FIG. 9 using the same procedure as in the first embodiment. Here, when rain is detected, the friction coefficient μ of the road surface decreases due to the wetness of the road surface, so the target drive shaft torque Tor is set to be decreased so as not to cause slippage. Note that the target drive shaft torque Tar may be determined using the accelerator opening Acc, the vehicle speed Vsp, and the amount of rainfall R using a simple linear formula as shown in the following equation without using table data.

Tor=kl ・2 to Acc- ・3 to Vsp- ・R
Next, a reference model H that defines the response characteristics of the drive shaft torque is based on the amount of rainfall R, which is a parameter indicating the driving condition.
(s) is selected from several preset reference models. As the reference model H(s), in consideration of vehicle stability, a reference model is selected that has characteristics that become more gradual as the rainfall amount R increases (road surface friction coefficient μ decreases), as shown in Fig. 1O. It is intended to be done.

Then, the target drive shaft torque Tar set by involving the rain iiR is converted into a target torque converter output shaft torque Ttr, as in the above embodiment, and further, this target torque converter output shaft torque Ttr and the torque converter output The target engine rotation speed Net is set based on the shaft rotation speed Nt, and the actual engine rotation speed Ne is further set based on the shaft rotation speed Nt.
Set a target engine output shaft torque Ter that can match the target engine rotational speed Ner in accordance with the response characteristics of the reference model, and set this target engine output shaft torque T.
The target throttle valve opening θO corresponding to er is set and the intake air amount of the engine is controlled via the throttle valve opening, and as a result, the accelerator operation amount Acc and the drive shaft torque Tor commensurate with the driving condition are adjusted according to the driving condition. to obtain response characteristics that are compatible with the

Also, using the loading compartment tW of the vehicle as the running state of the vehicle,
Based on this, the target drive shaft torque Tor may be determined.The loaded weight W of the vehicle can be determined by using a suspension stroke sensor, for example, and from the suspension engine stroke detected by the suspension stroke sensor. The loaded weight W is estimated.

In this case as well, the target drive shaft torque Tor is determined by the driver's request at that time (accelerator opening Acc) and the vehicle running state (
Based on the vehicle speed Vsp and the loaded weight W), the determination is made in the same manner as in the first embodiment, as shown in FIG. Here, in order to always obtain the same acceleration feeling, the target drive shaft torque Tar is increased as the loaded weight W increases. Here, too, the accelerator opening degree Ace and vehicle speed V
sp.

The target drive shaft torque Tor may be determined using the loading chamber 1w.

Tor = 1, Acc- 2, ■sp+ 3, W,
It is also possible to estimate the climbing plate of the vehicle and use this as the driving state of the vehicle. In other words, when driving at a constant speed, the longitudinal inclination θS of the road surface is detected using an acceleration sensor, and the target drive axis is determined based on this. Determine torque Tor and reference model H(s).

The target drive shaft torque Tor is calculated according to the first embodiment as shown in FIG. Determine using the same procedure as . Here, the target drive shaft torque Tor is increased while driving on the uphill road (θS〉0), and the target drive shaft torque Tar is decreased while driving on the downhill road (θs<0) to ensure good drivability. The table data of the target drive shaft torque Tar is set so as to obtain the target drive shaft torque Tar. As above, in this case as well, the accelerator opening Acc is determined by a simple linear formula as shown in the following equation without using table data.

Target drive shaft torque Ta using vehicle speed Vsp and road surface slope θS
r may also be determined.

Tor=kL-Acc-2-Vsp+31θS Furthermore, a reference model H(3) that defines the responsiveness of the drive shaft torque is set in advance based on the road surface slope θS, which is a parameter of the vehicle running state. As shown in Fig. 10, the standard model H(s) having a gentler response characteristic is selected while driving on the exit road (θS〈0). to ensure running stability.

Furthermore, it is also possible to detect the drive wheel load N using a stroke sensor provided on the drive wheel suspension, and to determine the target drive shaft torque Tor and the reference model H(s) based on this.

In this case as well, the target drive shaft torque Tor is determined as shown in FIG. The determination is made using the same procedure as in the first embodiment. Here, since the driving force transmitted to the road surface decreases as the drive wheel load N decreases, the target drive shaft torque Tor is decreased to prevent slipping. The target drive shaft torque Tor is determined using the accelerator opening Acc, vehicle speed Vsp, and drive wheel load N using a simple linear formula as shown in the following equation, without using table data as shown in Fig. 9. It's okay.

Tor=kl ・2 for Acc- ・3 for Vsp+ ・N
A reference model H that defines the response characteristics of the drive shaft torque is based on the drive wheel load N that indicates the running state of the vehicle.
(s) is selected from several preset reference models. Here, in order to prevent slippage, as shown in FIG. 10, a reference model is selected that has gentler characteristics as the driving wheel load N decreases.

In addition, as a method for estimating the driving wheel load N, the aerodynamic characteristics of the vehicle (the relationship between the occurrence of downforce with respect to the vehicle speed Vsp) is stored in advance in memory, and the wheel load is estimated from the vehicle speed Vsp using this, and the same method as above is performed. You may perform the operation.

This is especially necessary in the case of a vehicle whose aerodynamic characteristics are controlled to be variable, such as a variable spoiler, because the downforce of the vehicle can change depending on the control state of the aerodynamic control system. In such a case, the downforce of the vehicle may be estimated from the position of an aerodynamic control actuator such as a spoiler and the vehicle speed Vsp, or a value stored in advance in memory may be looked up.

In the above embodiment, the target drive shaft torque Tor and the standard model H(s) are determined using the steering angle α, rainfall amount R2, loading weight W, climbing plate, and drive wheel load N, which are parameters indicating the vehicle running state, respectively. However, by using multiple parameters that indicate these vehicle running conditions, the target drive wheel torque that approximately satisfies the requests from each vehicle driving condition parameter with an appropriate balance is approximately compatible with the multiple driving condition parameters. The response characteristics may be controlled based on the response characteristics.

<Effects of the Invention> As explained above, according to the present invention, the target drive shaft torque is set based on the accelerator operation amount, and the target engine engine Since the engine is controlled such that the engine rotation speed is set and the target engine rotation speed matches the target engine rotation speed in accordance with the response characteristics of a preset reference model, the engine is equipped with a torque converter. Even in this case, it is possible to generate a drive shaft torque commensurate with the amount of accelerator operation so as to match the response characteristics of a predetermined reference model.

In addition, along with the accelerator operation amount, the steering angle and rainfall amount.

By setting the target drive shaft torque based on the running conditions of the vehicle, such as the loaded weight and the weight of five wheels on the climbing board, and further selecting the reference model of the response characteristics based on the above-mentioned running conditions of the vehicle, This has the effect that the response characteristics of the drive shaft torque, which is largely involved in the behavior of the vehicle, can be directly controlled to suit the driving conditions of the vehicle.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the present invention, Fig. 2 is a system schematic diagram showing an embodiment of the present invention, Fig. 3 is a flowchart showing control details in the above embodiment, and Fig. 4 is the same embodiment as above. FIG. 5 is a diagram showing an example of table data of the target drive shaft torque Tor in FIG. The figure is a block diagram showing the configuration for converting the target engine rotation speed Net into the target engine output shaft torque Ter, and FIG. 8 shows the target throttle valve opening degree θ corresponding to the target engine output shaft torque Ter and the engine rotation speed Ne. . 9 is a diagram showing an example of table data of target drive shaft torque Tor based on vehicle running conditions, and FIG. 10 is a diagram showing an example of table data of target drive shaft torque Tor based on vehicle running conditions. FIG. 3 is a diagram showing the standard model selection characteristics.

Claims (9)

[Claims] (1) A control device for a vehicle engine including a torque converter, comprising an accelerator operation amount detection means for detecting an accelerator operation amount;
A gear ratio detection means for detecting a gear ratio in a transmission; a torque converter output shaft rotation speed detection means for detecting an output shaft rotation speed of a torque converter; an engine rotation speed detection means for detecting an engine rotation speed; target drive shaft torque setting means for setting a target value of drive shaft torque based on the accelerator operation amount, and according to the set target drive shaft torque, the detected gear ratio and the torque converter output shaft rotation speed; target engine rotation speed setting means for setting a target engine rotation speed that the engine should generate; 1. A control device for a vehicle engine, comprising: engine rotation speed control means for controlling the engine to match the engine rotation speed. (2) Target engine output shaft torque setting in which the engine rotation speed control means sets a target engine output shaft torque such that the engine rotation speed matches the target engine rotation speed in accordance with the response characteristics of a preset reference model. and an intake air amount control means for controlling an intake air amount of the engine based on the set target engine output shaft torque. Control device. (3) Vehicle running state detection means for detecting a vehicle running state is provided, and the target drive shaft torque setting means sets the target drive shaft torque based on the detected vehicle running state in addition to the detected accelerator operation amount. 3. The vehicle engine control device according to claim 1, wherein the vehicle engine control device is configured to set the control device. (4) Vehicle running state detection means for detecting the running state of the vehicle, and response characteristic reference model setting means for setting a reference model of engine rotational speed response characteristics based on the detected vehicle running state. Claim 1 characterized by:
4. The vehicle engine control device according to any one of 2 and 3. (5) The vehicle engine control device according to claim 3, wherein the vehicle running state detection means is configured to detect at least a steering angle. (6) The vehicle engine control device according to claim 3, wherein the vehicle running state detection means is configured to detect at least the amount of rainfall. (7) The vehicle engine control device according to claim 3, wherein the vehicle running state detection means is configured to detect at least the loaded weight of the vehicle. (8) The vehicle engine control device according to claim 3, wherein the vehicle running state detection means is configured to detect at least an uphill/downhill state of the vehicle. (9) The vehicle engine control device according to claim 3, wherein the vehicle running state detection means is configured to detect at least a wheel load of the vehicle.