JPH0326840A - Method and equipment for controlling driving parameter of automoble in dynamic driving condition - Google Patents

Abstract

PURPOSE: To properly maintain the operating state in accordance with a prescribed acceleration and the actual acceleration when a dynamic operating state changes, by steppedly changing the operational parameters which change the output of an engine. CONSTITUTION: A control unit 28 calculates the control quantities in accordance with the operating conditions such as the rotating speed, intake air quantity, and water temperature on the basis of the signals such as acceleration, deceleration, and reset from a speed control unit, and controls the operation of a throttle valve 14, a feed supply device 16, and an ignition control device 32 via a driving circuit 18. When the signal from the speed control unit and the signals from an accelerator pedal position sensor 49, a traveling speed sensor 45, and a gear position measuring device 47 are put in an arithmetic unit 36 to detect a step-change in the operation parameters which change the output of an engine, the detected result is multiplied by or added to the control quantity from the control unit 28 via a logic circuit 24. Thus, the operating state at the time of transient can be properly controlled without deteriorating the traveling characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for controlling operating parameters of a motor vehicle in dynamic operating conditions, and in particular to a method and apparatus for controlling operating parameters of a motor vehicle in dynamic operating conditions. such as fuel supply amount, air amount or ignition, according to at least one operating variable (quantity or parameter characterizing the operating state, hereinafter referred to as operating variable) of The present invention relates to a method and apparatus for controlling operating parameters that change engine output.

[Prior art] This type of method is described in German Patent Publication No. 3042246
listed in the number. In this publication, in order to improve driving characteristics, the amount of fuel to be supplied is corrected in accordance with engine temperature, rotational speed, and load in warm-up operation and acceleration mode. If an acceleration is recognized as a result of a change in the amount of fuel to be delivered, a correction factor is read out from the speed- and load-related data generator, which corrects the amount of fuel to be delivered.

This temperature-related correction factor also corresponds to the amount of fuel to be supplied, and becomes smaller as the rotational speed and load increase.

With such a method, it is not possible to obtain the dynamic characteristics of the vehicle that match the driver's intentions.

German Patent Publication No. 3510174 states that acceleration system i
A device for controlling the running speed of a motor vehicle using a ll device is described, in which a controller with at least one integral function is provided to control acceleration. When the tricycle starts a dynamic operating state introduced by operating an acceleration key or a deceleration key, the initial state of the acceleration controller is set as follows, i.e., the controller at the start of the dynamic operating state. It has been proposed that the value of the operating parameter that determines the engine output is set to the value immediately before the start of the dynamic operating state based on the output signal of the engine. However, even with this method, it is not possible to obtain satisfactory dynamic characteristics of the automobile.

[Problems to be Solved by the Invention] The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and by increasing the operating parameters that change the engine output, it is possible to solve the problem without deteriorating the driving characteristics. The object of the present invention is to make torque fluctuations that occur when a dynamic driving state changes or when a dynamic driving state is started correspond to the driver's intention and each driving state.

[Means for solving the problem] The above-mentioned problem is solved according to the invention by the features set forth in claim 1.

[Operation] In the following explanation, a change or start of a dynamic operating state means a change in acceleration or deceleration, respectively.
Alternatively, it indicates that new acceleration or deceleration is to be adopted.

According to the method of the invention, operating parameters such as fuel supply, air flow or ignition are changed according to a predetermined acceleration value and an actual acceleration value when dynamic operating conditions change or are started. It can change dramatically. The dynamic characteristics of the internal combustion engine are thereby improved and the increase in other operating parameters can be adapted to the driver's intentions and driving conditions.

The method according to the invention is particularly effective when used in combination with a road speed control unit. It is possible to accurately detect the swerving driving parameters and obtain an accurate correction value that is corrected according to the driver's intention and driving condition. Therefore, by accurately detecting torque fluctuations, favorable driving characteristics can be obtained. Furthermore, when an acceleration controller having an integral component is provided, the method of the present invention allows the integral component used for acceleration control to be automatically set to a desired torque fluctuation value that improves driving characteristics. .

[Examples] Hereinafter, the present invention will be described in detail using examples shown in the drawings.

FIG. 1 shows an internal combustion engine 1O with an intake pipe 12, in which a throttle valve 14 and at least one fuel supply device 16 are arranged. Furthermore, drive circuit 1
8 is shown, the drive circuit 18 is connected to the ignition valve 14 and the fuel supply device 16 or the ignition control device 32 via the connection line 20, and the connection line 22 and the logic circuit 24.
and is connected to a control unit 28 via a connection line 26. The human power of the control unit 28 is connected to measuring devices (not shown) that measure operating variables or parameters such as rotational speed, intake air volume, engine temperature, throttle valve angle, travel speed, and accelerator pedal position.

Further shown is an arithmetic unit 36, whose output line 3
8 is connected to the logic circuit 24, and human power lines 40, 42, 44
The operating variables described later are manually input.

The control unit 28 having the logic circuit 24 is a part of the engine control system 23, and a calculation unit 36 may be provided in the engine control system.

It is also possible to incorporate a travel speed control unit into the engine control system 23 or control unit 28. That's the first
In the figure, this is indicated by a connecting line 41 shown as a dotted line. A key switch (not shown) for "acceleration", "deceleration" or "return" of the traveling speed control unit is connected to the arithmetic unit 36 and the engine control system 23 or control unit 28 by the connection line 4l.
connected to.

Next, the functions of the device combined with the traveling speed control unit will be explained in detail.

As known to those skilled in the art, the control unit 28
From the aforementioned measured values supplied via 4, predetermined values are formed for operating parameters that vary the engine output, such as fuel supply, air flow, ignition, etc. These values are the connection line 2
6 and 22 to 20 to each device 14, 16, 32.

Note that the control unit 28 is, for example, an electronic engine control device or an electronic engine output control device.

In the embodiment specifically shown in FIG.
The human power line 42 is connected to a running speed sensor 45, and the human power line 44 is connected via a conversion circuit 46 to a gear position measuring device 47 that measures the position of the gear of the automobile.

Note that the object of the present invention is not limited to the illustrated circuit of the arithmetic unit 36, and other arithmetic devices capable of processing other operating variables, which will be described later, may also be used.

The functions of the arithmetic unit 36 will be explained with reference to the flowchart shown in FIG. The arithmetic unit 36 detects that the operating parameter for changing the engine output has dramatically increased based on the amount of human power.

The detection result is multiplied or added to the value of the operating parameter calculated by the control unit 28 via the connection line 38 and the logic circuit 24. Detection of whether the operating parameter that changes the engine output has increased dramatically is performed according to the procedure shown in FIG.

As shown at step 50 in FIG.
, 44, the values of the operating variables are read in. human force line 4
The operating variables read in via 0, 42 are related to the acceleration of the motor vehicle, such as, for example, the rotational speed, the driving speed, the throttle valve angle or the position of the accelerator pedal. In step 52 of FIG. 2, it is detected whether the vehicle is about to enter a dynamic operating state or whether a change has occurred in the dynamic operating state. For this purpose, changes in the operating variables read in via the manpower line 40 are detected. This detection can be performed, for example, by differentiating the human input signal or by comparing two consecutive values with each other. Filtering is performed in advance to prevent the method of the present invention from malfunctioning due to noise interference. r: shi' (from T, j
If the value obtained exceeds the predetermined threshold value at the beginning of the night, the system shifts to a dynamic operating state.
I can't judge. If it is determined that the dynamic operating state has been entered, cz proceeds to step 54, and if it is not determined in step 111, detection is started anew.

In step 54, a reference value of the acceleration of the automobile is determined from the operating variables read in °C via the human force line 40! i A 5
is calculated. This target value ζ is a constant value or is determined according to one's intention as reflected in the accelerator pedal position. Input line 42
In step 56, the actual value AI of the acceleration at the instant t is determined from the operating variables read in step 1. In step 58L, a coefficient K is used to correlate the acceleration and the human power signal supplied via the human power line 44.
is required.

This human power signal is a signal that is generated according to the speed at which the driver is moving.Furthermore, at step 60, it is calculated from the value already obtained: 7, 2, soto: } 6 output j) The value of Shinichi's bow is required. Preferably, in step (30), according to the difference between the acceleration value 11 and the actual value 12, calculations are performed as shown in the following equation.

SP-K (As-Ai) Note that A5 is the target value of acceleration, A1 is the actual value of acceleration, constant K is a conversion constant related to the gear detected in steps 5 to 8, and SP is It shows the dramatic -14 degrees of operating parameters that change the J7 engine output.

This total 1l-value (S P) is determined by the output line 38 and the logic circuit 24.
is coupled to the value of the operating parameter via , thereby dramatically increasing the operating parameter by -1. In this case, the dramatic upper limit of the operating parameters appears as an increase in the amount of fuel supplied.

Another preferred embodiment of the method of the invention is shown in FIG.
(In the block diagram of FIG. 3, an embodiment of the present invention is linked to a traveling speed control unit.
The same reference numerals as in FIG. 1 indicate similar devices or functions. FIG. 3 shows an arithmetic unit 36M which implements the method shown in FIG. Reference numeral 70 designates a traveling speed control unit 1.'C, which is known from the prior art, and constitutes one part 731K of the engine control system 23 or control unit 28. The traveling speed control unit 700 control i3II device 7l has at least a proportional characteristic,
The logic lj'iJ path 72 is also connected to the controller 71 via a connecting line 73. Traveling speed v1 control unit I/70
A control deviation indicating the difference between the target value and the actual value of the traveling speed or acceleration is manually inputted via the human input terminal 74, and an operating parameter for changing the engine output is inputted via the output terminal 75 of the traveling speed control unit 70. A control signal for control is output to the drive circuit l8. Furthermore, the traveling speed control unit 70 is provided with a human power terminal 76, and the connecting conductor 4
A start signal obtained from the acceleration, deceleration or return key via l is transmitted to the travel speed control unit 7 via the human input terminal 76.
0 is man-powered.

Furthermore, another logic circuit 80 shown by the dotted line e is provided,
This logic circuit 80 combines (multiplies or adds) the fuel, air immersion, or ignition values calculated by the control unit 28 according to the human input values with the output signal of the travel speed control unit. is connected to the engine control system. Note that the traveling speed control unit can be used to control fuel supply or air flow. Logic circuit 80 is connected via lead wire 26 to control unit 28 and via lead wire 73 and connection point 75 to controller 7l, and via output wire 22 to control operating parameters that change the engine output. It is connected to the drive circuit 18.

Note that the logic circuit 80 is shown only to indicate that the traveling speed control unit 70 is part of the engine control system 23.

Arithmetic unit 36 implements the method shown in FIGS. 1 and 2 in the following manner. In the vehicle speed control unit, a start signal is used to detect the transition to a dynamic operating state, which start signal is generated via the acceleration, deceleration or return key and is transmitted via the connecting conductor 41. The signal is supplied to the calculation unit 36 and the controller 7l. In the case of acceleration, a setpoint acceleration value is generated. This target value can be a constant value or a predetermined value that reflects the operating state. The output signal of the arithmetic unit is added to the manipulated variable via the connecting line 38 and the summing circuit 72, thereby producing a dramatic change in the control signal. Therefore, when the travel speed control unit is newly set or activated, the instantaneous value increases dramatically. Note that this operation can also be considered as setting the initial value of the controller 71@integral value.

The method of the invention is not limited to positive acceleration values, but can also be used in the case of deceleration with the opposite sign.

Note that the described method can be realized not only according to the block circuit diagram shown in the above-described embodiment, but also as a computer program.

[Effects of the Invention] As is clear from the above description, the present invention provides an advantage in that when the dynamic driving condition changes without deteriorating the driving characteristics by increasing the driving parameter that changes the engine output. Alternatively, the torque fluctuations that occur when a dynamic driving condition starts can be made to correspond appropriately to the driver's intention and each driving condition.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an apparatus for implementing the method of the present invention;
FIG. 2 is a flowchart R showing the procedure of the method of the present invention, and FIG. 3 is a block circuit diagram combining the present invention and a travel speed controller. lO...Internal combustion engine leapfrog 14...Finger valve 18...Drive circuit 24...Logic circuit 28...Control unit 36...
・Calculation unit 48...gear

Claims (1)

[Claims] 1) A method for controlling an operating parameter, such as fuel supply, air flow or ignition, that changes the engine output according to at least one operating variable of an internal combustion engine when the vehicle is in a dynamic operating state. A method for controlling operating parameters of a motor vehicle in a dynamic operating state, wherein a change in the operating variable causes a positive or negative acceleration of the motor vehicle, thereby resulting in a dynamic operating state. Detects the actual acceleration value, positive or negative, and generates a predetermined acceleration value when the dynamic operating condition changes or when the dynamic operating condition starts.