JP3044914B2 - Internal combustion engine control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for an internal combustion engine which controls the rotational speed of an internal combustion engine by operating a throttle valve of the engine with an electric actuator.

[0002]

2. Description of the Related Art As an internal combustion engine control device for controlling the rotation speed of an internal combustion engine, a throttle valve of a carburetor as a fuel supply amount adjustment unit of the engine is operated by an electric actuator to adjust the opening of the throttle valve. In some cases, the rotation speed is controlled so as to maintain a desired instruction speed.

FIG. 6 is a block diagram showing a schematic configuration of a conventional internal combustion engine control apparatus of this type. In this conventional control apparatus, a rotation speed of an internal combustion engine 1 is detected by a speed detection circuit 4, and A speed detection signal Vn obtained from the speed detection circuit is supplied to a speed deviation calculation circuit 6 together with a command speed signal Vno output from a speed command circuit 5 for setting a command rotation speed of the internal combustion engine. The speed deviation calculation circuit 6 calculates a deviation between the rotation speed of the internal combustion engine 1 and the commanded rotation speed, and outputs a deviation signal (Vno-Vn). The operation amount calculation circuit 7 determines the actuator 3 required to reduce the deviation between the rotational speed of the internal combustion engine 1 and the commanded rotational speed from the deviation signal (Vno-Vn) to zero.
The operation amount is calculated and an operation amount signal Vd is output, and this operation amount signal Vd is given to the actuator drive circuit 8. The actuator drive circuit 8 generates a drive current Id for obtaining an operation amount necessary for the actuator 3 according to the operation amount signal Vd.
Supply. As a result, the actuator 3 operates the throttle valve 2 to adjust the opening thereof so that the rotation speed of the internal combustion engine 1 matches the designated rotation speed.

[0004]

As described above, based on the speed detection signal and the commanded speed signal, the amount of operation of the actuator required to reduce the deviation between the rotation speed of the internal combustion engine and the commanded rotation speed to zero is determined. In the conventional control device which calculates and controls the opening of the throttle valve according to the obtained operation amount signal, the operation amount of the actuator becomes maximum when the internal combustion engine is started, and the throttle valve is fully opened. State. In general, in a carburetor used in a general-purpose internal combustion engine, the fuel flow system is set so that the air-fuel ratio is optimized near the rated rotation speed, so the throttle valve is fully opened when starting the engine with a low rotation speed. In this state, the air-fuel mixture becomes lean, and it becomes difficult to ignite and burn the air-fuel mixture, especially at low temperatures. Therefore, when the conventional control device is used, there is a problem that it is difficult to start the engine.

An object of the present invention is to provide an internal combustion engine control device which can prevent the mixture from becoming lean at the time of starting the internal combustion engine and can improve the startability of the engine.

[0006]

According to the present invention, as shown in FIG. 1 showing an embodiment of the present invention, a throttle valve 2 for adjusting a fuel supply amount (inflow of an air-fuel mixture) to an internal combustion engine 1 is electrically operated. The present invention relates to an internal combustion engine control device that controls an engine to rotate at an instructed speed by being operated by an actuator 3 of a type.

The control device according to the present invention comprises a speed detection circuit 4,
Speed instruction circuit 5, speed deviation calculation circuit 6, steady-state operation amount calculation circuit 7, throttle opening detection circuit 9, start-time throttle opening setting circuit 10, start-time operation amount calculation circuit 11, It includes a completion speed setting circuit 12, a control command signal generation circuit 13, an operation amount signal selection circuit 14, and an actuator drive circuit 8.

In the present invention, the actuator is fixed.
A stator made by winding an exciting coil around a core, and a stator iron
Flow through the excitation coil with the magnetic pole part facing the magnetic pole part of the core
Mover that produces a displacement proportional to the drive current
A spring that gives a restoring torque to the mover in proportion to the displacement of
The mover operates the throttle valve of the internal combustion engine
Solenoid connected to the throttle valve to
Use the formula.

The speed detection circuit 4 detects the rotation speed of the internal combustion engine and outputs a speed detection signal Vn.
An instruction speed signal Vno for setting an instruction rotation speed of the internal combustion engine is output. The speed deviation calculation circuit 6 receives the speed detection signal Vn and the commanded speed signal Vno as inputs, calculates the difference between the rotation speed of the internal combustion engine and the commanded rotation speed, and outputs a difference signal Vno-Vn.

A steady-state operation amount calculation circuit 7 calculates an operation amount of the actuator required to reduce the deviation between the rotation speed of the internal combustion engine and the commanded rotation speed to zero from the deviation signal, and obtains a steady-state operation amount signal Vdn. Is output.

[0011] throttle opening degree detecting circuit 9, the activator
The opening degree of the throttle valve 2 is detected by detecting the magnitude of the drive current of the heater, and a throttle opening detection signal Vi is output.
Outputs a starting throttle opening setting signal Vio corresponding to the setting throttle opening at the start of the internal combustion engine.

The starting manipulated variable calculation circuit 11 includes a starting throttle opening setting signal Vio and a throttle opening detection signal Vi.
The operation amount of the actuator 3 required to make the deviation between the throttle opening and the set throttle opening at the start time zero is calculated using the input as the input, and the start operation amount signal Vds is output.

[0013] The start completion speed setting circuit 12 provides a command speed signal.
Of the internal combustion engine in proportion to
Outputs the start completion speed setting signal Vns that gives the start completion speed
I do .

The control command signal generation circuit 13 outputs a speed detection signal.
Signal Vn is input to the inverting input terminal,
And a comparator whose signal is input to the non-inverting input terminal.
Output is fed back to the non-inverting input terminal of the comparator
With the feedback resistance, the internal combustion engine
The speed detection signal Vn starts to be smaller than the start completion set speed.
When the operation completion speed setting signal Vns is smaller than the magnitude of the operation completion speed setting signal Vns.
Output high level start control command signal Vcs from output terminal
The engine speed once exceeds the start completion speed
Of the start completion speed setting signal Vns
When the magnitude is exceeded, a low level is output from the output terminal of the comparator.
The constant control command signal Vcn is output .

When the start control command signal Vcs is generated, the manipulated variable signal selection circuit 14 controls the start manipulated variable signal Vds.
Is selected, and when the steady-state control command signal Vcn is generated, the steady-state operation amount signal Vdn is selected, and the selected operation amount signal is supplied to the actuator drive circuit 8.

The actuator drive circuit 8 supplies a drive current to the actuator 3 according to the operation amount signal selected by the operation amount signal selection circuit 14.

[0017]

In the above configuration, the steady-state operation amount calculation circuit 7
Output a steady-state manipulated variable signal Vdn, and a start-time manipulated variable operation circuit 11 outputs a start-time manipulated variable signal Vds. Until the rotation speed of the engine reaches the start completion speed set by the start completion speed setting circuit 12 when the internal combustion engine 1 is started, the operation amount signal selection circuit 14 selects the start operation amount signal Vds. The actuator drive circuit 8 supplies a drive current to the actuator 3 according to the starting operation amount signal Vds. At this time, the actuator operates the throttle valve by an amount corresponding to the set throttle opening at startup.

After the rotation speed of the internal combustion engine 1 has risen and once exceeded the start completion speed, the operation amount signal selection circuit 14 selects the operation amount signal Vdn in the steady state. Actuator 3 according to Vdn
To supply the drive current. At this time, the actuator operates the throttle valve 2 so that the rotation speed of the internal combustion engine 1 matches the specified rotation speed.

Therefore, the set throttle opening at the start is
If the air-fuel ratio of the air-fuel mixture is selected to be appropriate (for example, a half-open state) when the internal combustion engine 1 is started, the throttle opening is adjusted to the appropriate air-fuel ratio until the engine reaches the start completion speed. Can be maintained at a size that allows the engine to start, so that the engine can be easily started. After the engine speed once exceeds the start completion speed, the steady-state operation amount signal is selected, so that the throttle valve 2 is operated so that the internal speed of the internal combustion engine 1 becomes the specified speed.

[0020]

FIG. 1 shows the overall configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an internal combustion engine (in this example, a gasoline engine), and reference numeral 2 denotes a fuel mixture supplied to the internal combustion engine. This is a throttle valve provided in the carburetor. The throttle valve 2 is operated by an electrically driven actuator 3. Accordingly, the valve opening changes in accordance with the drive current Id of the actuator 3, and the amount of fuel mixture flowing into the internal combustion engine 1 is adjusted.

FIG. 2 schematically shows an example of the structure of the throttle valve 2 and the actuator 3. The throttle valve 2 includes a butterfly valve 201, a rotating shaft 202 supporting the butterfly valve, and a rotating shaft 202. A lever 203 fixed to one end is provided, and the valve is opened and closed by operating the lever 203. The actuator 3 used in this example is of a rotary solenoid type, and a pair of opposing magnetic pole portions 30 is used.
U-shaped stator core 301 having 1a and 301a
And a movable element 303 having a magnetic pole part opposed to a magnetic pole part 301a of the stator via a small gap and rotatably supported, and It comprises a lever 304 fixed to the armature and a spring 305 for giving a restoring torque proportional to the displacement angle θa when the armature rotates.

A drive torque substantially proportional to the drive current Id flowing through the exciting coil 302 is generated in the mover 303 of the actuator.
5 to a position where the restoring torque is balanced with the rest torque.

The lever 203 of the throttle valve 2 and the lever 304 of the actuator 3 are connected by a connecting rod 306, and the butterfly valve 201 of the throttle valve rotates in response to the rotation of the movable element 303 of the actuator. As shown in the figure, the throttle valve opening θt
Are displaced almost in proportion to the drive current Id of the actuator.

In FIG. 1, the speed detecting circuit 4 includes a rotational speed sensor 401 and a frequency / voltage converting circuit (F / V converting circuit) 402. Rotation speed sensor 4
Reference numeral 01 denotes a sensor for detecting the rotation speed of the internal combustion engine. As this sensor, for example, a pickup coil which is attached to the internal combustion engine and generates a voltage having a frequency f proportional to the rotation speed of the engine is used. In the case of a gasoline engine provided with an ignition device, one of the ignition coils of the ignition device is used.
Since the frequency of the voltage induced in the secondary coil is proportional to the rotation speed, the primary coil of the ignition coil can be used as a rotation speed sensor. Frequency / voltage conversion circuit 40
2 converts the output frequency of the sensor 401 into a voltage and outputs a speed detection signal Vn proportional to the rotation speed of the engine.

Reference numeral 5 denotes a speed instruction circuit for setting a desired instruction rotational speed for the internal combustion engine and outputting an instruction speed signal Vno of a voltage corresponding to the instruction rotational speed. This speed instruction circuit includes, for example, a constant DC voltage. Is divided by a resistor voltage divider including a variable resistor, and a divided voltage is output as an instruction speed signal Vno.

The speed detection signal Vn and the indicated speed signal Vno
Are input to the speed deviation calculation circuit 6. The speed deviation calculation circuit 6 calculates a deviation between the actual rotation speed and the instruction rotation speed of the internal combustion engine from the speed detection signal Vn and the instruction speed signal Vno, and outputs a deviation signal (Vno-Vn).

The deviation signal Vno-Vn is supplied to the steady-state manipulated variable operation circuit 7. This arithmetic circuit calculates the deviation signal Vno
The operation amount of the actuator 3 (the drive current Id of the actuator 3) required to make the deviation between the actual rotation speed and the instruction rotation speed of the internal combustion engine zero from −Vn is calculated. An operation amount signal Vdn is output. The steady-state operation amount circuit 7 is the same as the operation amount operation circuit used in this type of conventional control device, and includes a proportional, integral and differential operation circuit.

Reference numeral 9 denotes a throttle opening detection circuit which detects the opening of the throttle valve 2 and outputs a throttle opening detection signal Vi. In this embodiment, it is connected in series to the exciting coil 302 (see FIG. 2) of the actuator 3. A throttle opening detection circuit 9 is constituted by the resistor R1 and the voltage generated across the resistor R1 by the actuator drive current Id proportional to the opening .theta.t of the throttle valve is used as a throttle opening detection signal Vi = R1 Id. It has become.

A starting throttle opening setting circuit 10 sets a throttle opening at the start of the internal combustion engine. The setting circuit includes a starting throttle opening setting signal corresponding to the throttle opening at the start of the internal combustion engine. Output Vio. As shown in FIG. 4, the starting throttle opening setting circuit 10 divides a constant DC voltage Vb by a voltage dividing circuit comprising resistors R2 and R3, and uses the divided voltage as a starting throttle opening setting signal Vio. It can be configured by an output circuit.

The throttle opening detection signal Vi and the starting throttle opening setting signal Vio are input to the starting manipulated variable calculation circuit 11. The start-time manipulated variable calculation circuit 11 uses the throttle opening detection signal Vi and the start-time throttle opening setting signal Vio to determine the actuator required to reduce the deviation between the actual throttle opening and the set throttle opening at start-up to zero. 3 and outputs a start-time manipulated variable signal Vds.

As shown in FIG. 4, the starting manipulated variable calculating circuit 11 includes operational amplifiers OP1 and OP1 for impedance conversion.
The operational amplifier OP2 and the resistors R4 to
An adder / subtractor 111 composed of R9, a resistor R10, an integrating capacitor C, and an operational amplifier OP as an impedance converter
3). The output Vds of the integrating circuit 112 is supplied to the operational amplifier O through a resistor R6.
It is fed back to the input side of P2. Adder / subtractor 1
Numeral 11 performs an addition / subtraction operation using the throttle opening detection signal Vi, the starting throttle opening setting signal Vio, and the output Vds of the integration circuit 112 as input, and outputs an output signal Vo = α (Vio−V
i) + Vds [α is a proportional constant] is output. Since the potential difference between both ends of the resistor R10 is Vo−Vds = α (Vio−Vi), the output of the integrating circuit 112 obtained by integrating the current flowing through the resistor R10 by the integrating capacitor C (starting operation amount signal) is Vds = (α / R10C) ∫ (Vio−Vi) dt When the actuator 3 is operated in response to the signal Vds, the signal Vds continues to change until Vio−Vi becomes zero and becomes stable when Vi = Vio, and the opening of the throttle valve 2 is set to the set throttle opening at the start. It is kept every time.

Referring to FIG. 1, reference numeral 12 denotes a start completion speed setting circuit, which is provided with an instruction speed signal Vno.
, And sets a start completion speed, and outputs a start completion speed setting signal Vns proportional to the speed instruction signal. 13
Is a control command signal generation circuit, which receives a speed detection signal Vn and a start completion speed setting signal Vns as inputs and outputs a start control command signal until the rotation speed of the internal combustion engine reaches the start completion speed, After the rotation speed of the internal combustion engine once exceeds the start completion speed, a steady-state control command signal is output.

FIG. 5 shows an example of a specific configuration of the start completion speed setting circuit 12 and the control command signal generation circuit 13.
In FIG. 1, the start completion speed setting circuit 12 comprises an operational amplifier OP4 as an impedance converter, and a voltage divider composed of resistors R11 and R12 for dividing an indicated speed signal Vno obtained at an output terminal of the operational amplifier. The divided voltage of the command speed signal Vno is output as a start completion speed setting signal Vns.

The control command signal generating circuit 13 includes a comparator CO
The start completion speed setting signal Vns is input to the non-inverting input terminal of the comparator COMP1, and the speed detection signal Vn is input to the inverting input terminal of the comparator COMP1. Until the rotation speed of the internal combustion engine reaches the start completion speed, Vn ≦ Vns.
The output terminal of P1 is at a high level, and the high-level output becomes the start control command signal Vcs. After the rotational speed of the internal combustion engine once exceeds the start completion speed and becomes Vn> Vns, the output terminal of the comparator COMP1 becomes low level (or zero level), and this low level (or zero level) output is output. It becomes the constant control command signal Vcn. The feedback resistor R13 connected between the output terminal of the comparator COMP1 and the non-inverting input terminal prevents a hunting phenomenon from occurring when the output level of the comparator COMP1 is inverted, and at the same time controls the steady-state control command. After the signal Vcn is output, the output of the comparator COMP1 is set to a low level so that the steady-state control command signal is continuously output when the rotation speed of the engine falls again and becomes lower than the start completion speed. (Or zero level).

In the present invention, as shown in FIG.
Start completion speed setting output from the start completion speed setting circuit 12.
The constant signal Vns changes in proportion to the value of the command speed signal Vno.
As a result, the commanded rotational speed of the internal combustion engine
However, the start control is maintained until the rotation speed becomes higher accordingly.
It is possible to lifting, Ru was smoothly starting the engine
be able to.

The steady-state operation amount signal Vdn, the start-time operation amount signal Vds, and the control command signals Vcs and Vcn are input to the operation amount signal selection circuit 14. The manipulated variable signal selection circuit 14 selects the start manipulated variable signal Vds when the start control command signal Vcs is input, and selects the steady manipulated signal Vdn when the steady control command signal Vcn is inputted. And outputs the selected manipulated variable signal Vds or Vdn. As the operation amount signal selection circuit 14, a relay controlled by a control command signal to switch and output the operation amount signals Vds and Vdn,
It can be constituted by a changeover switch circuit composed of an analog switch using a semiconductor switch or the like.

The operation amount signal selected by the operation amount signal selection circuit 14 is input to the actuator drive circuit 8. The actuator drive circuit 8 receives a battery 801 as a power supply, a transistor circuit 802 including a power transistor Tr for controlling a drive current Id supplied from the battery to the actuator 3, a diode D 1, and an operation amount signal selection circuit 14. And a drive signal generation circuit 803 that supplies a drive signal to the transistor circuit 802 in accordance with the operation amount signal. Next, the operation of the internal combustion engine control device of the above embodiment will be described. When the internal combustion engine 1 is started, the engine speed detected by the speed detection circuit 4 is equal to or lower than the start completion speed set by the start completion speed setting circuit 12. Signal is output. At this time, the manipulated variable signal selection circuit 14 operates the starting manipulated variable signal Vds.
And inputs the signal Vds to the actuator drive circuit 8. The actuator drive circuit 8 supplies a drive current Id to the actuator 3 according to the starting operation amount signal Vds. The manipulated variable signal Vds sets the deviation between the opening of the throttle valve 2 detected by the throttle opening detecting circuit 9 and the set throttle opening at start set by the starting throttle opening setting circuit 10 to zero. Therefore, the actuator 3 operates the throttle valve so that the throttle opening coincides with the set opening at the time of starting. Therefore, until the engine speed reaches the start completion speed, the opening of the throttle valve 2 is maintained at the set throttle opening at the time of starting (for example, a half-open state).

When the rotation speed of the engine increases and exceeds the start completion speed, the control command signal generation circuit 13 outputs a steady state control signal. At this time, the manipulated variable signal selection circuit 1
4 selects the steady-state operation amount signal Vdn and gives the signal Vdn to the actuator drive circuit 8. The actuator drive circuit 8 supplies a drive current to the actuator 3 according to the steady-state operation amount signal Vdn. Since the operation amount signal Vdn changes so that the deviation between the rotation speed of the internal combustion engine and the instruction circuit speed becomes zero, the actuator operates the throttle valve so that the rotation speed of the internal combustion engine matches the instruction rotation speed. Therefore, once the engine speed exceeds the start completion speed, the opening of the throttle valve is controlled so as to maintain the engine speed at the instructed speed.

In the above embodiment, the opening of the throttle valve is detected from the drive current of the actuator. However, the opening of the throttle valve is detected using a displacement detector such as a potentiometer or a differential transformer. It may be.

[0040]

As described above, according to the present invention, the steady-state manipulated variable operation circuit, the start-time manipulated variable operation circuit, and the manipulated variable signal selection circuit are provided, and the engine speed is started when the internal combustion engine is started. Until the completion speed is reached, the opening of the throttle valve is controlled by the starting operation amount signal to maintain the throttle opening at the setting at the start, so that the opening of the throttle valve is set to an appropriate size when starting the engine. This has the advantage that the starting of the internal combustion engine can be facilitated. Also, after the internal combustion engine speed exceeds the start completion speed and enters a steady operation state, the engine speed is controlled by the steady-state operation amount signal so as to maintain the engine speed at the specified rotation speed. Speed control can be performed. Further according to the invention
The actuator that operates the throttle valve
The displacement of the mover changes in proportion to the drive current
Driving the actuator using a solenoid type
Detects the opening of the throttle valve by detecting the current.
So that the position sensor is attached to the throttle valve.
Without installing a, detects the drive current of the actuators
Throttle valve simply by providing a simple detection circuit
There is an advantage that the opening degree can be detected.

Also, in the present invention, the speed detection signal is
Input terminal and the start completion speed setting signal is not inverted
A comparator input to the input terminal and an output of the comparator
Feedback resistor that feeds back to the non-inverting input terminal
The control command signal generation circuit is composed of a circuit with
The internal combustion engine speed is equal to or less than the start completion set speed.
High-level start control command signal from the output terminal of the comparator.
Output, and the rotational speed of the internal combustion engine once exceeds the
After that, the low-level steady-state control
Command signal is output continuously, so that starting is completed.
Rotation speed has dropped to near the start completion set speed
Occasionally, a hunting phenomenon can be prevented.

Further, according to the present invention, the start completion speed setting cycle
The start completion speed setting signal output from the road
Of the internal combustion engine.
Even if the indicated rotation speed becomes high, the rotation speed will increase accordingly
The engine starts smoothly by maintaining the starting control until
Can be made.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a configuration diagram schematically showing a configuration of a throttle valve and an actuator used in an embodiment of the present invention.

FIG. 3 is a diagram showing a relationship between an exciting current of an actuator and an opening degree of a throttle valve when the throttle valve and the actuator of FIG. 2 are used.

FIG. 4 is a circuit diagram showing a specific configuration example of a starting throttle opening degree setting circuit and a starting manipulated variable calculation circuit shown in FIG. 1;

FIG. 5 is a circuit diagram showing a specific configuration example of a start completion speed setting circuit and a control command signal generation circuit shown in FIG. 1;

FIG. 6 is a block diagram showing an overall configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Throttle valve 3 Actuator 4 Speed detection circuit 5 Speed instruction circuit 6 Speed deviation calculation circuit 7 Constant operation amount calculation circuit 8 Actuator drive circuit 9 Throttle opening detection circuit 10 Throttle opening setting circuit at start 11 Operation at start Volume calculation circuit 12 Start-up completion speed setting circuit 13 Control command signal generation circuit 14 Operation amount signal selection circuit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-150444 (JP, A) JP-A-56-162241 (JP, A) JP-A-59-20539 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F02D 41/06 310 F02D 11/10 F02D 45/00 312

Claims (1)

(57) [Claims] An exciting coil is wound around a stator core.
A stator and a magnetic pole portion facing the magnetic pole portion of the stator core;
Having a displacement proportional to the drive current flowing through the exciting coil
And a restoration proportional to the displacement of the mover
A spring for applying torque to the mover,
So that the child operates the throttle valve of the internal combustion engine.
An actuator connected to a rotary valve, a speed detection circuit that detects a rotation speed of the internal combustion engine and outputs a speed detection signal, and a speed instruction circuit that outputs an instruction speed signal that sets an instruction rotation speed of the internal combustion engine. A speed deviation calculation circuit that calculates a deviation between the rotational speed of the internal combustion engine and the instruction rotational speed from the speed detection signal and the instruction speed signal and outputs a deviation signal; and a rotational speed of the internal combustion engine and an instruction from the deviation signal. A steady-state operation amount calculation circuit that calculates an operation amount of the actuator necessary to reduce the deviation from the rotation speed to zero and outputs a steady-state operation amount signal; and an opening degree of the throttle valve based on a drive current of the actuator. Throttle opening detection circuit for detecting a throttle opening and outputting a throttle opening detection signal; and a starting throttle corresponding to a set throttle opening when starting the internal combustion engine. A starting throttle opening setting circuit for outputting a throttle opening setting signal, and a deviation between the throttle opening and the starting throttle opening when the starting throttle opening setting signal and the throttle opening detection signal are input. A starting manipulated variable calculating circuit for calculating a manipulated variable of the actuator necessary for making the actuator zero and outputting a starting manipulated variable signal; and a proportional to the designated rotational speed with the designated speed signal as an input.
A start completion speed setting circuit that outputs a start completion speed setting signal that gives a start completion speed of the internal combustion engine, and the speed detection signal is input to an inverting input terminal,
Comparator with completion speed setting signal input to non-inverting input terminal
And the output of the comparator to a non-inverting input terminal of the comparator.
And a feedback resistor for feedback.
When the rotation speed of the internal combustion engine is equal to or less than the start completion set speed,
The magnitude of the speed detection signal is the magnitude of the start completion speed setting signal.
High level starting from the output terminal of the comparator when:
A control command signal is output, and the rotation speed of the internal combustion engine is
When the magnitude of the speed detection signal exceeds the start completion speed,
When the magnitude of the start completion speed setting signal is exceeded,
A low-level steady-state control command signal is output from the output terminal of the comparator.
A control command signal generating circuit to output , selecting the start-time manipulated variable signal when the start control command signal is generated, and selecting the steady-state manipulated signal when the steady-state control command signal is generated An internal combustion engine control device comprising: an operation amount signal selection circuit that performs the operation; and an actuator drive circuit that supplies a drive current to the actuator in accordance with the operation amount signal selected by the operation amount signal selection circuit.