JPH07208307A - On-vehicle control device - Google Patents

Abstract

PURPOSE:To start an internal combustion engine positively and prevent the engine from being stalled by wrong starter operation. CONSTITUTION:A starter signal STA from a starter switch 5 is taken in through an interface 17, and as signal course, it is directly connected to a port 15STA of B/U (back up)-RAM 15 not via CPU 11. The signal course is thus connection to a port 11STA of the CPU 11 via a resistor 22 and a diode 23. In CPU 11, when engine rotational frequency NE from a rotation angle sensor 7 exceeds a specific rotational frequency, the port 11STA becomes Lo and the diode 23 becomes ON. The starter signal STA flows to the diode 23, and does not reach to B/U-RAM 15. An internal combustion engine is positively started due to the starter signal being masked within the B/U-RAM 15 at the time of starting, and so it is not stalled even when the starter is operated by mistake at the time of idling or running.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle control device, and more particularly to an on-vehicle control device which prevents misfires of an internal combustion engine (engine) due to erroneous operation of a starter.

[0002]

2. Description of the Related Art Conventionally, as a prior art document related to an on-vehicle control device, one disclosed in Japanese Patent Laid-Open No. 173846/1988 is known. In this, in order not to erroneously determine electrical noise due to voltage fluctuation during starter operation when starting the internal combustion engine as an engine rotation signal,
A technique is disclosed in which the detection of the engine rotation speed is stopped for a predetermined time immediately after the starter is turned on, and the internal combustion engine can be reliably started.

As a related prior art document, the one disclosed in Japanese Patent Application Laid-Open No. 57-59057 is known. In this one, while the internal combustion engine is in the starting state and when the high rotation speed operating state is detected until a predetermined period elapses after completion of the starting, the fixed ignition timing control is stopped,
Ignition timing control is performed based on the calculated ignition timing.

[0004]

By the way, in the former case, the detection of the rotation speed is stopped for a predetermined period of time required for starting the internal combustion engine from the start of the internal combustion engine. Therefore, if the starter is erroneously operated when the engine speed is high after the internal combustion engine is started, detection of the engine speed will be stopped, and engine stall due to misfire may occur, as in normal starter operation. There is.

In the latter case, the starter signal and the engine rotation signal are directly taken into the RAM in the control circuit.
Further, an output signal to the igniter is generated based on the engine speed NE. Here, if the driver mistakenly operates the starter at the time of idling or when the engine speed is higher than that at the time of idling, as in the normal starter operation, R
The engine rotation signal is masked by AM. In such a case, the engine rotation signal is temporarily ignored, so an appropriate output signal to the igniter is not generated, and there is a risk of engine stall due to misfire.

Therefore, the present invention has been made in order to solve such a problem, and the internal combustion engine is surely started up, and even if the starter is operated by mistake when it is driven at a predetermined speed or more. It is an object to provide an in-vehicle control device that does not generate engine stall.

[0007]

According to a first aspect of the present invention, there is provided an in-vehicle control device, an input means for taking in various signals representing an operating state of an internal combustion engine, and a central processing means for executing arithmetic processing based on the various signals (hereinafter, referred to as central processing means). , Simply referred to as "CPU") and a storage means for storing and holding various data backed up by a battery, and energizing a starter which gives a rotational force for changing the internal combustion engine from a stopped state to a started state among the various signals. A starter signal from the switch, which indicates that the starter is being driven, is output from the input means to the C
A control circuit having a signal path directly to the storage means without passing through a PU, and when the engine rotation speed based on the rotation signal of the internal combustion engine among the various signals exceeds a preset predetermined rotation speed. And a propagation preventing means for preventing the starter signal on the signal path from reaching the storage means.

According to a second aspect of the present invention, the storage means of the control circuit of the vehicle-mounted control device has, in addition to the means provided in the first aspect, after the starter signal from the input means changes from on to off. An ignition switching circuit for switching the ignition timing of the internal combustion engine from a preset fixed hard ignition until then to a soft ignition set based on the calculation of the CPU after a predetermined crank angle position after a preset top dead center. It is equipped with.

According to a third aspect of the present invention, in addition to the means provided in the first aspect, the propagation preventing means of the vehicle-mounted control device sets the voltage level in the middle of the signal path of the control circuit to the CP level.
The starter signal is prevented from reaching the storage means by switching based on the signal state of U.

An on-vehicle control device according to a fourth aspect of the present invention stores an input means for taking in various signals representing an operating state of an internal combustion engine, a CPU for executing arithmetic processing based on the various signals, a battery backed-up and holding various data. A starter signal from the starter switch that energizes the starter that gives a rotational force for changing the internal combustion engine from the stopped state to the started state among the various signals. Means to the CP
A control circuit having a signal path directly to the storage means without passing through U is provided, and the storage means of the control circuit has an engine speed based on a rotation signal of the internal combustion engine among the various signals in advance. When the set number of revolutions is exceeded, the starter signal is masked and invalidated.

[0011]

According to the first aspect of the present invention, the control circuit determines whether or not the number of revolutions of the internal combustion engine taken into the input means out of various signals representing the operating state of the internal combustion engine exceeds a preset number of revolutions. It is determined by the CPU. If the engine speed based on the rotation signal of the internal combustion engine among the various signals exceeds the predetermined speed, the starter signal on the signal path directly from the input means to the storage means without passing through the CPU is stored in the storage means. It is prevented from reaching.

In addition to the function of claim 1, the storage means of the control circuit of the vehicle-mounted control device according to claim 2 is, when the starter signal is input from the input means by the ignition switching circuit, only when the internal combustion engine is being started. The ignition timing is set to a preset fixed hard ignition, and is set based on the calculation of the CPU after the preset crank angle position after the preset top dead center after the starter signal STA is turned from ON to OFF. Switch to soft ignition. Therefore, reliable ignition is performed at the time of starting the internal combustion engine, and the ignition timing corresponding to various adaptive controls does not deviate after the internal combustion engine exceeds a predetermined rotation speed.

In addition to the operation of the first aspect, the propagation preventing means of the vehicle-mounted control device of the third aspect switches the voltage level of the signal path based on the signal state of the CPU. Therefore, when the engine speed exceeds the predetermined speed, the starter signal on the signal path is prevented from reaching the storage means. Therefore, the starter signal based on the incorrect starter operation is adopted, and the rotation of the internal combustion engine does not become unstable.

According to another aspect of the present invention, the starter signal and the engine speed, which are taken in by the input means, are directly input to the storage means in the control circuit among various signals representing the operating state of the internal combustion engine. Then, it is determined inside the storage means whether or not the preset number of revolutions exceeds a predetermined number of revolutions. When the number of revolutions exceeds the predetermined number of revolutions, the starter signal is masked. Therefore, the starter signal based on the incorrect starter operation is adopted, and the rotation of the internal combustion engine does not become unstable.

[0015]

EXAMPLES The present invention will be described below based on specific examples.

<First Embodiment> FIG. 1 is a block diagram showing an internal configuration of peripheral equipment and an ECU (Electronic Control Unit) used in a vehicle-mounted control device according to a first embodiment of the present invention. Is.

In FIG. 1, as peripheral equipment, 1 is a water temperature sensor for detecting a cooling water temperature of an internal combustion engine (not shown) and generating a voltage signal THW corresponding to the detected value, 2 is an intake air amount. An air flow sensor 3 for generating a voltage signal Qa corresponding to the detected value, a throttle sensor 3 for detecting an opening of a throttle valve opened / closed by an accelerator pedal operation, and a signal TP corresponding to the detected value, 4 are internal combustion engines. An ignition switch 5 for generating a signal IGSW for controlling the start / stop of the engine is a starter switch 5 for generating a starter signal STA which is closed when the starter motor is driven. Further, 6 is a reference angular position (signal) G1 based on a rotation signal every time the distributor converts into a predetermined angle, for example, a crank angle of 360 ° CA.
, G2 for generating a rotation angle sensor, and 7 for a distributor, which is a predetermined angle, for example, 30 ° converted into a crank angle.
Engine rotation speed (signal) based on the rotation signal for each CA rotation
A rotation angle sensor 8 for generating NE, and an ignition device 8 for supplying a high voltage to an ignition plug (not shown) of an internal combustion engine to explode it.

Reference numeral 10 denotes an ECU. The internal structure of the ECU 10 includes a CPU 11, a clock generation circuit 12, and a ROM 1.
3, RAM14, B / U-RAM (backup IC)
15, A / D converter 16, interface (input I
C) 17, a timing signal forming circuit 18, a speed signal forming circuit 19, an ignition control circuit 20, and a bus 21. A
The / D converter 16, the interface 17, the speed signal forming circuit 19, and the ignition control circuit 20 include a CPU 11, a clock generation circuit 12, a ROM 13, a RAM 14, and a B / U-R.
It is connected to the AM 15 via a bus 21, and input / output data is transferred via this bus 21.

The voltage signals THW and Qa from the water temperature sensor 1 and the air flow sensor 2 are input to an A / D converter 16 including an analog multiplexer of the ECU 10 and sequentially converted into binary signals at a predetermined conversion cycle. . Further, the signals TP, IGSW, and STA from the throttle sensor 3, the ignition switch 4, and the starter switch 5 are input to the interface 17. The reference angular positions G1 and G2 and the engine speed NE from the rotation angle sensor 6 and the rotation angle sensor 7 are input to the timing signal forming circuit 18. The speed signal forming circuit 19 opens and closes a gate controlled by a gate control signal having a pulse width corresponding to a crank angle of 30 degrees from the timing signal forming circuit 18 and the number of clock pulses passing through this gate every time the gate is opened. It has a well-known configuration including a counter that counts the number of times, and forms a binary speed signal having a value corresponding to the rotational speed of the engine. The ignition control circuit 20 is a circuit that forms the ignition signals IGT1 and IGT2 from the output data regarding the energization start timing and the energization end timing of the ignition coil (not shown) calculated by the CPU 11, that is, the output data regarding the ignition timing. The generated ignition signals IGT1 and IGT2 are output to the ignition device 8.

Starter signal S from starter switch 5
TA is the CPU 11 and B via the interface 17 and the bus 21, and the reference angular positions G1 and G2 from the rotation angle sensor 6 and the engine speed NE from the rotation angle sensor 7 are both via the timing signal forming circuit 18. / U-
It is directly input to the RAM 15. Furthermore, the starter signal S from the starter switch 4 via the interface 17
The signal line of TA is connected to the port 11STA of the CPU 11 via the resistor 22 and the diode 23, and branched from the intermediate point between the resistor 22 and the diode 23 and connected to the input port 15STA of the B / U-RAM 15. ing.

Next, referring to FIG. 2, B / U-of the present embodiment.
The internal structure of the RAM 15 will be described. B / U-RAM15
The internal configuration of is mainly inputting the starter signal STA, and when the starter signal is Hi, the reference angular position G
STA-ON that outputs the judgment signal that masks 1 and G2
/ OFF mask determination circuit 151, reference angular positions G1 and G2 from the timing signal forming circuit 18, and engine speed N
A crank counter 152 that inputs E and outputs a signal converted into a crank angle and also inputs a determination signal from the STA-ON / OFF mask determination circuit 151, a signal of the crank counter 152, and a first signal from the timing signal forming circuit 18. IGT monitor circuit 153 for inputting the ignition timing IGT1 and the second ignition timing IGT2 to monitor the ignition timing.
, The signal from the IGT monitor circuit 153 and the WDC (Watch
The CPU 11 from the (Dog Counter) port inputs a signal indicating normality / abnormality and executes a fail determination, a fail determination circuit 154, a starter signal STA and an engine speed N.
An injection control circuit 155 that inputs E and a signal from an IDL (Idling) port to generate an injection control signal, a signal from the injection control circuit 155 and an injection amount signal TAU, and a hard ignition circuit 157 described later. The injection switching circuit 156 for executing the injection switching, the hard ignition circuit 157 for calculating the hard ignition timing based on the signal from the crank counter 152 and the switching signal from the injection switching circuit 156, and the signal from the fail determination circuit 154 are input. IGT1 switching circuit 158 for switching between the first ignition timing IGT1 and the hard ignition timing from the hard ignition circuit 157, the signal from the fail determination circuit 154 is also inputted, and the second ignition timing IGT2 and the hard ignition circuit 157 are fed. IGT2 switching circuit for switching between hard ignition timing 159 and.

Next, the processing procedure of the CPU 11 used in the vehicle-mounted control device according to the first embodiment of the present invention will be described with reference to FIG.
This will be described with reference to the timing chart of FIG. Note that this flow chart is always executed at the timing of reading the engine speed NE from the rotation angle sensor 7.

First, after the engine speed NE is read in step S1, the process proceeds to step S2, and the read engine speed NE is the predetermined engine speed K (for example, 5).
00 rpm) or less is determined. Here, when the internal combustion engine is being started and the STA signal from the starter switch 5 is input (time t0 in FIG. 4), the engine speed NE
Is not generated or has not exceeded the predetermined rotation speed K, the process proceeds to step S3. In step S3, the port 11STA of the CPU 11 is fixed at Hi (5V). Therefore, the diode 23 is fixed in the off state, and the STA signal input from the starter switch 5 is transferred to the interface 1
7 and the resistor 22 to reach the port 15STA of the B / U-RAM 15. As a result, the B / U-RAM1
The determination of the STA-ON / OFF mask determination circuit 151 in 5 is turned on (Hi), and the STA-ON / OFF mask determination circuit 151 causes the crank counter 152 to
A G mask signal for canceling the reference angular positions G1 and G2 for 150 ms is output (time t1 in FIG. 4). Therefore, the reference angular position G1 (G2) when the G mask signal is being output (time t1 to t2 in FIG. 4) is invalid. At the same time, the hard ignition circuit 157 sets the ignition timing to the preset hard ignition. Therefore, the starting of the internal combustion engine is reliable and stable.

On the other hand, when it is determined in step S2 that the engine speed NE read in step S1 exceeds the predetermined speed K set in advance and the inequality sign does not hold (after time t3 in FIG. 4), step S4 Move to CP
The port 11STA of U11 is fixed at Lo (0V).
Therefore, the diode 23 is fixed from the off state to the on state, and the STA signal input from the starter switch 5 is input to the port 11STA of the CPU 11 via the interface 17, the resistor 22 and the diode 23, and B / It is prevented that the port 15STA of the U-RAM 15 is reached. As a result, the S in the B / U-RAM 15
The determination of the TA-ON / OFF mask determination circuit 151 is off (Lo), and the G mask signal is not output from the STA-ON / OFF mask determination circuit 151 to the crank counter 152. Therefore, the STA signal input from the starter switch 5 by mistakenly activating the starter at the time of idling or running when the engine speed exceeds the predetermined speed K is input to the CPU 11, and the B / U-RAM 15
The STA signal is not input to the terminal (time t4 in FIG. 4). In other words, after the time t3 in FIG. 4 in which the CPU port 11STA becomes Lo, the reference angular position G1 (G2) is not invalidated and all are valid, and an appropriate output signal to the igniter is generated. Will never occur.

As described above, the vehicle-mounted control apparatus according to the present embodiment has the input means achieved by the interface 17 for taking in various signals representing the operating state of the internal combustion engine and the CPU 11 for executing the arithmetic processing based on the various signals. B / U-RAM1 that is backed up with a battery and stores and holds various data
5, the starter is driven from a starter switch 5 that energizes a starter that gives a rotational force for changing the internal combustion engine from a stopped state to a started state among the various signals. The ECU 10 having a signal path from the input means to the storage means directly without going through the CPU 11 from the input means.
When the engine speed NE based on the rotation signal of the internal combustion engine among the various signals exceeds a preset predetermined speed K, the starter signal STA on the signal path is stored in the storage means. And a propagation preventing means that is achieved by a diode 23 that prevents the voltage level in the middle of the signal path of the control circuit from changing to the signal state of the CPU 11. The starter signal STA is prevented from reaching the storage means by switching on the basis of this, and this embodiment can be defined as claim 3.

Therefore, of the various signals representing the operating state of the internal combustion engine, is the engine speed NE based on the rotation signal of the internal combustion engine taken into the timing signal forming circuit 18 exceeded the preset predetermined speed K? Whether or not it is determined by the CPU 11 in the ECU 10 that constitutes the control circuit. Then, the voltage level of the port 11STA of the CPU 11 is switched. Then, the diode 23 connected to the port 11STA of the CPU 11 is ON / OFF controlled, and the voltage level in the middle of the signal path of the starter signal STA is switched. That is, when the port 11STA of the CPU 11 becomes Lo, the diode 23 is turned on, and even if the starter signal STA of the signal path reaches the port 11STA side of the CPU 11, B
It does not reach the / U-RAM15 side.

Therefore, a misfire may occur even when the driver mistakenly operates the starter when the engine speed exceeds a predetermined speed when the engine is started or when the engine is started, as well as when the starter is operated for starting the internal combustion engine. Instead, stable ignition control of the internal combustion engine is performed.

In the above embodiment, the propagation preventing means is the CPU 1
This is achieved by switching the voltage level in the middle of the signal path based on the signal state of the port 1 1STA of No. 1 but the present invention is not limited to this, and the engine speed NE is set in advance. When the specified rotational speed K is exceeded, the starter signal STA on the signal path is B / U-R.
Any means can be used as long as it can prevent the storage means achieved by the AM 15, and this embodiment can be defined as claim 1.

Therefore, the control circuit is configured to determine whether or not the number of revolutions of the internal combustion engine taken into the timing signal forming circuit 18, which receives various signals indicating the operating state of the internal combustion engine, exceeds a predetermined number of revolutions set in advance. CPU 1 in ECU 10
It is judged in 1. Then, in order to prevent the starter signal STA on the signal path from reaching the B / U-RAM 15, for example, the CPU 1 is provided on the signal path only when the internal combustion engine is started.
A normally-closed switch that is opened by the signal from 1 may be arranged in series.

Further, a B / U-RAM that realizes a storage means in the ECU 10 which constitutes the control circuit in the above embodiment.
Reference numeral 15 is a preset ignition timing of the internal combustion engine after the predetermined crank angle position after the preset top dead center after the starter signal STA from the interface 17 for achieving the input means is turned from ON to OFF. The present invention is provided with an IGT1 switching circuit 158 and an IGT2 switching circuit 159 which constitute an ignition switching circuit for switching the fixed fixed hard ignition to the soft ignition set based on the calculation of the CPU 11. It can be term 2.

Therefore, only when the starter signal is input from the interface 17 by the ignition switching circuit and the internal combustion engine is being started, the ignition timing is set to a fixed hard ignition, and the starter signal STA changes from on to off. After that, after a predetermined crank angle position after the preset top dead center, the ignition is switched to the soft ignition set based on the calculation of the CPU 11.

Therefore, the ignition timing is hard ignition only when the internal combustion engine is started, and hard ignition occurs even if the driver mistakenly operates the starter when the engine speed exceeds a predetermined speed during idling or running. Therefore, stable ignition control for the internal combustion engine is performed.

<Second Embodiment> FIG. 5 is a block diagram showing the configuration of a vehicle-mounted control device according to a second embodiment of the present invention. The B / U-RAM 15 in the first embodiment is a B / U-RAM.
A configuration is shown in which the RAM 15R is replaced and the starter signal STA is masked in the B / U-RAM 15R. The signal path in the internal configuration of the ECU in this case is as shown in the block diagram of FIG.
The diode 23 is eliminated and the starter signal STA from the starter switch 5 always reaches the B / U-RAM 15R directly through the interface 17. In addition, this embodiment corresponds to the embodiment of claim 4, and those having the same configurations or corresponding portions as those of the above-mentioned first embodiment shown in FIG. Is omitted.

In FIG. 5, the engine speed NE is STA-ON.
The only difference from FIG. 2 is that it is also input to the / OFF mask determination circuit 151R. Thus, the engine speed N
E directly to STA-ON / OFF mask determination circuit 151R
, The engine speed NE and the level of the starter signal STA are judged internally, and when the engine speed NE exceeds the predetermined speed K, masking of the reference angular position G1 (G2) is prohibited. As a result, similarly to the above-described embodiment, an appropriate output signal to the igniter is generated, so it is possible to prevent an engine stall due to a misfire.

As described above, the vehicle-mounted control apparatus of this embodiment has the input means achieved by the interface 17 for fetching various signals representing the operating state of the internal combustion engine and the CPU 11 for executing the arithmetic processing based on the various signals. B / U-RAM1 that is backed up with a battery and stores and holds various data
5R is a storage means, and the starter is driven from a starter switch 5 that energizes a starter that gives a rotational force for changing the internal combustion engine from a stopped state to a started state among the various signals. ECU 1 having a signal path from the input means to the storage means directly without going through the CPU 11 from the input means
0 of the control circuit, and B / U-of the control circuit
The RAM 15R masks and invalidates the starter signal STA when the engine speed based on the internal combustion engine speed signal among the various signals exceeds a preset predetermined speed. Can be claim 4.

Therefore, the ECU 1 constituting the control circuit
To the B / U-RAM 15R in 0, the starter signal STA and the engine speed NE taken into the interface 17 among various signals representing the operating state of the internal combustion engine are directly input. Then, the STA-ON / OFF mask determination circuit 151R determines whether or not the preset number of revolutions is exceeded. When the number of revolutions exceeds the predetermined number, the starter signal STA is masked.

Therefore, not only when the starter is operated for starting the internal combustion engine, but also when the engine speed exceeds the predetermined speed when the engine is idle or running, misfire may occur even if the driver mistakenly operates the starter. Instead, stable ignition control of the internal combustion engine is performed.

[0038]

As described above, the on-vehicle control device according to the first aspect of the invention has the input means for taking in various signals representing the operating state of the internal combustion engine, the CPU for executing arithmetic processing based on these various signals, and the battery backup. The storage means for storing and holding various data indicates that the starter from the starter switch that energizes the starter that gives the rotational force for changing the internal combustion engine from the stopped state to the started state among various signals is being driven. The starter signal is C from the input means.
A control circuit having a signal path directly to the storage means without passing through the PU, and a signal path when the engine speed based on the rotation signal of the internal combustion engine among various signals exceeds a preset predetermined speed. Propagation prevention means for preventing the above starter signal from reaching the storage means,
It is possible to prevent the starter signal on the signal path of the control circuit from reaching the storage means when the engine speed taken into the input means out of the various signals exceeds the preset predetermined speed. As a result, even if the driver mistakenly operates the starter at the time of operating the starter for starting the internal combustion engine, or at the time of idling or running, there is an effect that a stable ignition control is performed on the internal combustion engine without causing misfire. .

In addition to the effect of the first aspect, the vehicle-mounted control device according to the second aspect is preset with the storage means of the control circuit and after the starter signal from the input means is switched from ON to OFF. After the predetermined crank angle position after the top dead center, an ignition switching circuit is provided for switching the ignition timing of the internal combustion engine from the fixed hard ignition set up to then to the soft ignition set based on the calculation of the CPU. Only when the starter signal is input from the input means by the ignition switching circuit and the internal combustion engine is being started, the ignition timing is set to a fixed hard ignition, and the starter signal is set from ON to OFF. After the predetermined crank angle position after the above-described top dead center, the soft ignition is set based on the calculation of the CPU. As a result, the ignition timing will be hard ignition only when the internal combustion engine is started, and hard ignition will occur even if the driver mistakenly operates the starter when the engine speed exceeds the predetermined speed during idling or running. Therefore, there is an effect that stable ignition control is executed for the internal combustion engine.

In addition to the effect of the first aspect, the vehicle-mounted control device according to the third aspect provides the starter signal by switching the voltage level in the middle of the signal path of the control circuit based on the signal state of the CPU. In order to prevent reaching the storage means, the starter signal on the signal path of the control circuit is output when the number of revolutions of the internal combustion engine taken into the input means exceeds the predetermined number of revolutions among various signals. Reaching the storage means is prevented. As a result, even if the driver mistakenly operates the starter at the time of operating the starter for starting the internal combustion engine, or at the time of idling or running, there is an effect that a stable ignition control is performed on the internal combustion engine without causing misfire. .

According to another aspect of the present invention, there is provided an on-vehicle control device, an input means for taking in various signals representing an operating state of an internal combustion engine, a CPU for executing arithmetic processing based on these various signals, and a memory for storing and holding various data backed up by a battery. A starter signal from a starter switch that energizes a starter that gives a rotational force for changing the internal combustion engine from a stopped state to a start state among various signals, and a starter signal indicating that the starter signal is driving the CPU from the input means. A control circuit having a signal path directly to the storage means without any intervention, and when the engine speed among various signals based on the rotation signal of the internal combustion engine exceeds a preset predetermined speed, on the signal path The storage means of the control circuit is provided with a propagation prevention means for preventing the starter signal from reaching the storage means.
When the engine speed exceeds a preset predetermined speed, the starter signal is masked and invalidated. As a result, even if the driver mistakenly operates the starter at the time of operating the starter for starting the internal combustion engine, or at the time of idling or running, there is an effect that a stable ignition control is performed on the internal combustion engine without causing misfire. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal configuration of a peripheral device and an ECU used in a vehicle-mounted control device according to a first embodiment of the present invention.

FIG. 2 is a B / U-RAM constituting an ECU used in the vehicle-mounted control device according to the first embodiment of the present invention.
It is a block diagram showing.

FIG. 3 is a flowchart showing a processing procedure of starter signal input permission control of a CPU used in the vehicle-mounted control device according to the first embodiment of the present invention.

FIG. 4 is a timing chart showing various signal states of the vehicle-mounted control device according to the first embodiment of the present invention.

FIG. 5 is a B / U-RAM constituting an ECU used in a vehicle-mounted control device according to a second embodiment of the present invention.
It is a block diagram showing.

[Explanation of symbols]

 1 Water Temperature Sensor 2 Air Flow Sensor 3 Throttle Sensor 4 Ignition Switch 5 Starter Switch 6, 7 Rotation Angle Sensor 8 Ignition Device 10 ECU (Control Circuit) 11 CPU 15 B / U-RAM 17 Interface 22 Resistor 23 Diode

Claims (4)

[Claims] 1. An input means for taking in various signals representing an operating state of an internal combustion engine, a central processing means for executing arithmetic processing based on the various signals, and a storage means for storing and holding various data backed up by a battery, Of the various signals, the starter signal from the starter switch that energizes the starter that gives the rotational force for changing the internal combustion engine from the stopped state to the started state is driven directly from the input means by the storage means. A control circuit having a signal path to the means, when the engine speed based on the rotation signal of the internal combustion engine of the various signals exceeds a preset predetermined speed, the starter signal on the signal path is An in-vehicle control device comprising: a propagation preventing unit that prevents the storage unit from reaching the storage unit. 2. The internal combustion engine after the preset crank angle position after a preset top dead center after the starter signal from the input means is turned off from the storage means of the control circuit. 2. The vehicle-mounted device according to claim 1, further comprising an ignition switching circuit for switching the ignition timing of the vehicle from a preset fixed hard ignition to a soft ignition set based on the calculation of the central processing means. Control device. 3. The propagation preventing means prevents the starter signal from reaching the storage means by switching a voltage level in the middle of the signal path of the control circuit based on a signal state of the central processing means. The in-vehicle control device according to claim 1, wherein 4. An input means for receiving various signals representing an operating state of the internal combustion engine, a central processing means for executing arithmetic processing based on the various signals, and a storage means for storing and holding various data backed up by a battery, Of the various signals, the starter signal from the starter switch that energizes the starter that gives the rotational force for changing the internal combustion engine from the stopped state to the started state is driven directly from the input means by the storage means. The storage means of the control circuit includes a control circuit having a signal path leading to the means, and the engine speed based on the rotation signal of the internal combustion engine among the various signals exceeds a predetermined speed. At times, the on-vehicle control device is characterized by masking the starter signal to invalidate it.