JPH0578937U - Control device for internal combustion engine with supercharger - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a control device for an internal combustion engine with a supercharger, which is capable of restarting operation even before a certain period of time has elapsed. [Structure] When a predetermined time is measured by a timer T, a first-b contact T-1b of the timer T opens, and a motor M2
Is stopped and the connection by the electromagnetic clutch 24 is disconnected. If it is set to the "START" position during timing,
The starter motor is rotated, the internal combustion engine is started, and the coil R3 of the third relay is excited. Therefore, the second b contact R3-2b is opened, and the coil R1 of the first relay is demagnetized. The 1a contact R1-1a and the 2a contact R1-2a are opened, the rotation of the motor M2 is stopped, and the connection by the electromagnetic clutch 24 is disconnected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control device for an internal combustion engine with a supercharger, which operates the supercharger for a certain time when the operation of the internal combustion engine equipped with the supercharger is stopped.

[0002]

[Prior Art]

 Conventionally, when stopping the operation of an internal combustion engine equipped with a supercharger, the supercharger is exposed to high-temperature exhaust gas and is at a high temperature. It is known that the operation of the supercharger is continued for a certain period of time because it may cause a failure of the supercharger.

[0003]

[Problems to be solved by the device]

 However, in such a conventional type, the operation of the supercharger is continued until a certain time has elapsed. If the vehicle is restarted before the elapse of a certain period of time, there is a problem that the vehicle may not be able to be operated because the operation of the supercharger is continued until the certain period of time elapses.

Therefore, the present invention has an object to solve the above-mentioned problems, and it is an object of the present invention to provide a control device for an internal combustion engine with a supercharger, which is capable of restarting operation even before a certain period of time elapses.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention has the following configuration as means for solving the problems. That is, when stopping the operation, in a control device for an internal combustion engine with a supercharger, which comprises a supercharger timing control means for operating the supercharger for a certain period of time, the operation of the internal combustion engine is stopped before the certain period of time elapses. This is the configuration of a control device for an internal combustion engine with a supercharger, characterized by comprising restart control means for releasing control by the supercharger timing control means when restarting.

[0006]

[Action]

 In the control device for an internal combustion engine with a supercharger having the above configuration, the supercharger timing control means operates the supercharger for a certain period of time when the operation is stopped. Then, when the restart control means restarts the operation of the internal combustion engine before the elapse of the fixed time, the control by the supercharger timing control means is released.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of an internal combustion engine which is an embodiment of the present invention. Reference numeral 1 is an internal combustion engine, and an intake system of the internal combustion engine 1 is configured to guide the air sucked through a cleaner 2 to the internal combustion engine 1 through an intake pipe 4. The intake pipe 4 is provided with a throttle valve 6, and the opening of the throttle valve 6 is detected by a throttle sensor 8.

Further, the intake pipe 4 is provided with a fuel injection valve 10 for injecting fuel sucked into the internal combustion engine 1. The fuel injection amount of the fuel injection valve 10 is controlled by the control device 11 according to the opening degree of the throttle valve 6 detected by the throttle sensor 8.

Further, the exhaust system of the internal combustion engine 1 guides the exhaust gas to the three-way catalytic converter 14 via the exhaust pipe 12, purifies the exhaust gas, and then exhausts it. An igniter 18 is connected to the spark plug 16 provided in the internal combustion engine 1, and the ignition timing is controlled by the control device 11.

The intake pipe 4 and the exhaust pipe 12 are provided with a supercharger 20 which is rotationally driven by exhaust gas and compresses and supplies air that is taken in. The rotating shaft 22 of the supercharger 20 is connected to the rotating shaft of the motor M2 via an electromagnetic clutch 24.

When the supercharging pressure by the supercharger 20 exceeds a predetermined value, the actuator 28 operates, the waste gate valve 30 opens, and part of the exhaust gas bypasses the supercharger 20 and is exhausted. It flows into the pipe 12 to reduce the rotation speed of the supercharger 20 to reach the set pressure.

In this embodiment, the key switch KSW can be switched to four positions of “LOCK”, “ACC”, “ON”, and “START”, and at the position of “LOC K”, The handle is locked and the key (not shown) can be inserted and removed. Further, at the position of "ACC", an accessory device such as a lamp or a radio (not shown) and the battery 34 are connected.

Further, at the “ON” position, the control device 11 and the battery 34 are connected together with the lamp, the radio, and the like. Further, at the position "START", the starter motor 36 and the battery 34 are connected together with the control device 11. Then, while being held at the "START" position, the starter motor 36 rotates to rotationally drive a crankshaft (not shown) of the internal combustion engine 1 to start the internal combustion engine 1.

Moreover, the contacts corresponding to the “LOCK”, “ACC”, and “START” positions of the key switch KSW are connected to the restart control device 38. As shown in FIG. 2, the restart control device 38 is composed of a relay circuit in this embodiment, and includes a timer T and first to fourth relays. In this embodiment, the timer T functions as a supercharger timing control means, and is of a timed operation type in which contacts are opened when a certain time has passed since the voltage was applied, for example, 10 minutes.

The timer T is connected in series between both control buses PN together with the “ACC” contact of the key switch KSW and the 1b contact R2-1b of the second relay, and the “ACC” contact of the key switch K SW. The second relay contact R3-2b of the third relay, the first relay contact R1-1a of the first relay, and the second relay contact T-2b of the timer T are connected in parallel with each other.

Further, the first-a contact R1-1a of the first relay, the first-b contact T-1b of the timer T, and the motor M2 are connected in series, and the motor M2, the electromagnetic clutch 24, and the coil R4 of the fourth relay are connected. Each is connected in parallel. On the other hand, the "LOCK" contact of the key switch KSW, the 1b contact R4-1b of the fourth relay, and the coil R2 of the second relay are connected in series between both control buses PN. Further, the "LOCK" contact of the key switch KSW is connected in parallel with the 1b contact R3-1b of the third relay and the 1a contact R2-1a of the second relay. Further, the "START" contact of the key switch KSW and the coil R3 of the third relay are connected in series between both control buses PN.

Next, the operation of the control device for the internal combustion engine with a supercharger of this embodiment will be described. First, at the time of starting, a key (not shown) is inserted into the key switch KSW, and the “LOCK” contact point is closed. As a result, the coil R2 of the second relay is excited, the first-a contact R2-1a of the second relay is closed, and the excitation of the coil R2 of the first relay is self-maintained. Further, the first-b contact R2-1b of the second relay is opened.

When the key (not shown) is further rotated and the handle (not shown) is unlocked to the “ACC” position, the “ACC” contact closes. However, since the 1b-contact R2-1b of the second relay is open, no voltage is applied to the timer T and the timer T does not operate.

By further rotating and rotating to the “ON” position, the lamp or the control device 11 and the battery 34 are connected. When it is rotated to the "START" position, the starter motor 36 is rotated and the internal combustion engine 1 is started. At this time, the "START" contact is closed, the coil R3 of the third relay is excited, and the 1b-th contact R3-1b of the third relay is opened. Therefore, the coil R2 of the second relay is de-excited, the first-a contact R2-1a of the second relay is opened, and the first-b contact R2-1b is closed.

After the start-up is completed, the control device 11 is set to the “ON” position and the operation of the internal combustion engine 1 is controlled. Then, when the key switch KSW is rotated from the “ON” position to the “ACC” position due to the end of the operation of the internal combustion engine 1, the control device 11 stops the control of the fuel injection valve 10 and the ignition plug 16. The rotation of the internal combustion engine 1 stops.

As shown in FIG. 2, when the “ACC” contact of the key switch KSW is closed, the first-b contact R2-1b of the second relay is closed, so the timer T starts counting time. Further, the coil R1 of the first relay is excited, whereby the 2a contact R1-2a of the first relay is closed, and the excitation of the coil R1 of the first relay is self-maintained.

Then, the first-a contact R1-1a of the first relay is also closed, the motor M2 is rotationally driven, the electromagnetic clutch 24 is connected, and the supercharger 20 is rotated by the motor M2. At the same time, the coil R4 of the fourth relay is excited, the first b contact R4-1b of the fourth relay is opened, and the excitation of the coil R2 of the second relay is restricted.

Further, when the key switch KSW is rotated to the “LOCK” position and the key is removed, the first-b contact R4-1b of the fourth relay is open, so the coil R2 of the second relay is excited. Without, the key is removed. In this state, when the elapse of a certain time is measured by the timer T, the first-b contact T-1b of the timer T is opened, the rotation of the motor M2 is stopped, the connection by the electromagnetic clutch 24 is disconnected, and the fourth The coil R4 of the relay is demagnetized, and the first-b contact R4-1b is closed.

At the same time, the second-b contact T-2b of the timer T is opened, and the coil R 1 of the first relay is demagnetized. Therefore, the 1a contact R1-1a and the 2a contact R1-2a of the first relay are also opened. On the other hand, if a key (not shown) is inserted to restart the operation of the internal combustion engine 1 before the timer T finishes measuring the fixed time, the "LOCK" contact is closed first. During the timekeeping, the coil R4 of the fourth relay is excited and the first-b contact R4-1b thereof is open, so the coil R2 of the second relay is not excited.

Therefore, the first-b contact R2-1b of the second relay remains closed, and the operation of the motor M2 is continued. The same is true when rotated to the “ON” position and the “ACC” position, and when it is rotated to the “START” position, the starter motor 36 is rotated to start the internal combustion engine 1. At the same time, the coil R3 of the third relay is excited.

As a result, the second-b contact R3-2b is opened, and the coil R1 of the first relay is demagnetized. Therefore, the 1a contact R1-1a and the 2a contact R1-2a are opened, the rotation of the motor M2 is stopped, and the connection by the electromagnetic clutch 24 is disconnected. Further, the coil R4 of the fourth relay is demagnetized, and the first-b contact R4-1b is closed.

As described above, even during the time counting by the timer T, the rotation of the motor M2 is stopped, the connection by the electromagnetic clutch 24 is disconnected, and the internal combustion engine 1 can be started. On the other hand, when the key switch KSW is rotated from the "ON" position to the "ACC" position to stop the operation of the internal combustion engine 1, the vehicle is left with the key kept in the "ACC" position, as described above. Similarly, when the "ACC" contact is closed, the timer T starts time counting since the first b contact R2-1b of the second relay is closed. Further, the coil R1 of the first relay is excited, whereby the second-a contact R1-2a of the first relay is closed, and the excitation of the coil R1 of the first relay is self-maintained.

Then, the first-a contact R1-1a of the first relay is also closed, the motor M2 is rotationally driven, the electromagnetic clutch 24 is connected, and the supercharger 20 is rotated by the motor M2. When the elapse of a certain time is measured by the timer T, the first-b contact T-1b of the timer T is opened, the rotation of the motor M2 is stopped, and the connection by the electromagnetic clutch 24 is disconnected.

On the other hand, in order to restart the operation of the internal combustion engine 1 before the timer T finishes measuring the fixed time, the key switch KSW is rotated to rotate to the “ON” position and the “STAR T” position. Then, the starter motor 36 is rotated, the internal combustion engine 1 is started, and the coil R3 of the third relay is excited.

As a result, the second-b contact R3-2b is opened, and the coil R1 of the first relay is demagnetized. Therefore, the 1a contact R1-1a and the 2a contact R1-2a are opened, the rotation of the motor M2 is stopped, and the connection by the electromagnetic clutch 24 is disconnected. Further, the coil R4 of the fourth relay is demagnetized, and the first-b contact R4-1b is closed.

As described above, even during the time counting by the timer T, the rotation of the motor M2 is stopped, the connection by the electromagnetic clutch 24 is disconnected, and the internal combustion engine 1 can be started. In this embodiment, after the operation of the internal combustion engine 1 is stopped, the supercharger 20 is rotated by the motor M2 for a certain period of time, but instead of this, the operation of the internal combustion engine 1 is continued for a certain period of time. You can also In that case, instead of connecting the motor M2 and the electromagnetic clutch 24, the control device 11 is connected and the control device 11 operates the internal combustion engine 1 under a predetermined operating condition until the timer T measures a certain time. The driving may be controlled.

The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the scope of the present invention.

[0033]

[Effect of the device]

 As described in detail above, the control device for an internal combustion engine with a supercharger of the present invention can resume the operation of the internal combustion engine by canceling the control by the supercharger timing control means even during the time counting. Has the effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a control device for an internal combustion engine with a supercharger as an embodiment of the present invention.

FIG. 2 is a sequence circuit diagram in the restart control device of the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine 4 ... Intake pipe 6 ... Throttle valve 11 ... Control device 12 ... Exhaust pipe 20 ...
Supercharger 38 ... Restart control device KSW ... Key switch M1 ... Starter motor M2 ... Motor T ... Timer

Claims (1)

[Scope of utility model registration request] 1. A control device for an internal combustion engine with a supercharger, comprising: a supercharger timing control means for operating a supercharger for a certain period of time when the engine is stopped. The control device for an internal combustion engine with a supercharger, comprising: a restart control means for canceling the control by the supercharger timing control means when restarting the operation.