JP2002322929A - Drive control device for fuel pump for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start an engine in such a manner that a fuel pump is actuated at early stage and fuel pressure is sufficiently increased. SOLUTION: The drive control device is provided with the first pump relay 5 controlled to be opened and closed by the ECM 2 on the basis of a signal of an ignition switch 4 and the second pump relay 6 interlocked with the device switch 7 such as a key insertion switch operated without regard to the state in which an ignition switch is in the ON or OFF position. The second pump relay 6 is in the ON position, even though the ignition switch is in the OFF position, whereby a fuel pump 1 is started before the ignition switch 4 is in the ON position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a vehicle fuel pump, and more particularly to a technique for starting a fuel pump.

[0002]

2. Description of the Related Art Conventionally, an ignition switch has been
A configuration is known in which the fuel pump is started when N is reached, and the fuel pump is stopped if the engine is not started within a predetermined time thereafter (see JP-A-8-061755).

[0003]

By the way, when the ignition key is moved from the ignition ON position to the starter O,
The time for operating to the position N is not constant due to individual differences, and if the key operation time is short, the time from starting the fuel pump to starting the supply of fuel to the engine becomes short. I will.

[0004] If the operation time of the fuel pump before the fuel supply to the engine is started is short, the fuel supply will be started before the fuel pressure is sufficiently increased, and the fuel injection becomes unstable. There is a problem that the exhaust properties may deteriorate. The present invention has been made in view of the above problems, and enables the fuel pump to be started before the ignition switch is turned on, so that even if the ignition key is operated in a short time. It is another object of the present invention to provide a drive control device for a vehicle fuel pump that can secure an operation time of a fuel pump capable of sufficiently increasing a fuel pressure before starting an engine.

[0005]

Therefore, the invention according to claim 1 is configured to start the electric fuel pump in conjunction with a switch of a device that operates independently of the ON / OFF state of an ignition switch. According to such a configuration, by energizing the fuel pump in conjunction with a switch of a device that operates independently of turning on / off the ignition switch by operating the ignition key, the fuel pump is triggered by a trigger different from the operation of the ignition key. Start.

The device switch includes a door lock switch, a door open / close switch, a brake pedal switch, an accelerator pedal switch, a trunk open / close switch, a light switch, an AT position switch, a key insertion switch, a horn switch, a door mirror operation switch, It is possible to use a seat belt insertion switch, an electric seat switch, or the like.

[0007] In the invention according to claim 2, the device switch is configured to be a switch that operates earlier than the ignition switch when the engine is started.
According to such a configuration, the device switch is operated before the ignition switch is turned on, so that the fuel pump is started before the ignition switch is turned on.

According to the third aspect of the invention, when the engine is stopped, the operation time of the fuel pump linked to the device switch is limited. According to this configuration, if the engine is still stopped at the time when a predetermined time has elapsed after the fuel pump is started in conjunction with the device switch, the fuel pump is stopped and the fuel in the engine stopped state is stopped. Limit the operating time of the pump.

According to a fourth aspect of the present invention, when the engine is stopped, the operation of the fuel pump linked to the device switch is stopped when the fuel pressure reaches a predetermined value. According to this configuration, after the fuel pump is started in conjunction with the device switch, if the engine is still stopped when the fuel pressure reaches a predetermined value, the fuel pump is stopped.

According to a fifth aspect of the present invention, as the pump relay for switching the energization of the fuel pump, a first pump relay whose contacts are opened and closed based on an ON / OFF signal of the ignition switch is interlocked with the device switch. And a second pump relay that opens and closes the contacts. According to such a configuration,
Even when the ignition switch is OFF and the contact of the first pump relay is open, the fuel pump can be energized by closing the contact of the second pump relay in conjunction with the device switch. .

According to a sixth aspect of the present invention, the contact of one pump relay for switching the energization of the fuel pump is opened and closed based on signals from the ignition switch and the device switch. According to such a configuration, before the ignition switch is operated,
If the contact of the pump relay is closed in conjunction with the device switch and the ignition switch is turned on, the contact of the pump relay is closed based on the ON state of the ignition switch regardless of the signal of the device switch.

According to a seventh aspect of the present invention, the opening and closing of the contacts based on the signals of the ignition switch and the device switch are performed via a vehicle anti-theft device. According to this configuration, when the anti-theft device determines that there is a risk of theft, the fuel pump is stopped by opening the contact of the pump relay prior to the signals of the ignition switch and the device switch.

[0013]

According to the first aspect of the present invention, the fuel pump can be started regardless of the ON / OFF of the ignition switch, so that the operating time of the fuel pump before the start of fuel injection to the engine is secured. This makes it possible to stabilize the fuel injection at the time of starting the engine, thereby improving the exhaust properties at the time of starting.

According to the second aspect of the present invention, the fuel pump is started before the ignition switch is turned on, so that the operating time of the fuel pump for sufficiently increasing the fuel pressure can be secured, and the fuel at the time of starting can be secured. There is an effect that the injection is stabilized and the exhaust properties are improved. According to the third aspect of the present invention, when the fuel pump started based on the device switch is operated for a long time while the engine is stopped, the battery goes up or a large operating noise of the fuel pump is generated. There is an effect that can be avoided.

According to the fourth aspect of the present invention, the fuel pressure can be raised to the required level in advance by starting the fuel pump based on the device switch, and the fuel pressure can be increased after reaching the required level. Operation can be avoided, and it is possible to avoid running out of the battery and generating a loud operating noise of the fuel pump. According to the fifth aspect of the invention, there is an effect that the control function of the fuel pump linked to the device switch can be easily added to the drive control of the fuel pump linked to the normal ignition switch.

According to the present invention, the drive control function of the fuel pump in conjunction with the device switch can be realized at low cost, and the operating conditions of the fuel pump can be finely set. . Claim 7
According to the described invention, it is possible to judge the danger of theft from the operation state of the device switch, forcibly stop the fuel pump as a theft prevention measure, and to forcibly stop the engine. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a drive circuit diagram of the fuel pump according to the first embodiment. The fuel pump 1 shown in FIG.
Sucks the fuel in the fuel tank provided in the vehicle,
This is an electric pump that feeds pressure to a fuel injection valve (not shown).

The fuel injection valve is opened by an injection drive signal from an engine control module 2 (hereinafter referred to as ECM2) to inject and supply fuel to the engine. The ECM 2 receives an engine speed signal, an intake air amount signal, a coolant temperature signal, and the like from various sensors.

The voltage of the battery 3 is applied to the fuel pump 1 through an ignition switch (IGN SW) 4 and a first pump relay 5, and the ignition switch 4 is turned on by operating an ignition key. A switch that switches between ON and OFF.
The first pump relay 5 is an electromagnetic relay whose opening and closing is controlled by the ECM 2, and the energization of the electromagnetic coil 5a is controlled by the ECM 2, so that the contact 5b is opened and closed.

The ECM 2 controls energization of the electromagnetic coil 5a based on a signal from the ignition switch 4. Specifically, when the ignition switch 4 is turned on, the energization of the electromagnetic coil 5a is started, the contact 5b of the first pump relay 5 is closed, the voltage of the battery 3 is applied, and the fuel pump 1 is started. .

Thereafter, if the engine has not been started even after the lapse of a predetermined time, the power supply to the electromagnetic coil 5a is cut off to stop the fuel pump 1, but the engine has been started within the predetermined time. Then, the power supply to the electromagnetic coil 5a is continued until the engine is stopped, and the fuel pump 1 is operated. The state of the relay control by the ECM 2 is shown in the flowchart of FIG.

In the flowchart of FIG. 2, in step S1, it is determined whether the ignition switch 4 is ON or OFF, and if the ignition switch 4 is OFF,
Proceeding to step S5, the first pump relay 5 is turned off. If it is determined in step S1 that the ignition switch 4 is ON, the process proceeds to step S2, and it is determined whether a predetermined time has elapsed since the ignition switch 4 was turned ON.

If it is within the predetermined time, the process proceeds to step S4, where the first pump relay 5 is turned on. On the other hand, if the predetermined time has elapsed, the routine proceeds to step S3, where it is determined whether or not the engine is rotating. If the engine is rotating, the process proceeds to step S4, and the first pump relay 5 is turned on even after a predetermined time has elapsed. If the engine is stopped, the process proceeds to step S5, where the first pump relay 5 is turned off. The fuel pump 1 is turned off to prevent the fuel pump 1 from being operated for more than the predetermined time in the engine stopped state.

Here, in the circuit configuration shown in FIG. 1, a second pump relay 6 for applying the voltage of the battery 2 to the fuel pump 1 is provided independently of the first pump relay 5. The electromagnetic coil 6 of the second pump relay 6
a, a device switch 7 that operates independently of the ON / OFF of the ignition switch 4 is arranged between the battery switch 3 and the ON / OFF of the device switch 7.
The power supply to the electromagnetic coil 6a is intermittently intermittently linked with the FF.

Although the power supply of the device switch 7 is described as the battery 3 in the present application, a device switch 7 using a power supply other than the battery 3 may be used.
According to the above configuration, when the device switch 7 is turned on, the electromagnetic coil 6a is energized and the contact 6b is closed, and even if the first pump relay 5 is in the OFF state, the second pump relay 6 is turned off. The battery 3 is connected to the fuel pump 1 via the battery.

The device switch 7 includes a door lock switch, a door open / close switch, a brake pedal switch, an accelerator pedal switch, a trunk open / close switch, a light switch, an AT position switch, a key insertion switch, a horn switch, a door mirror operation switch, and a seat. A belt insertion switch, an electric seat switch, or the like is used.

For example, when a key insertion switch for detecting the insertion of an ignition key into an ignition key cylinder is used as the device switch 7, when the driver inserts the ignition key into the cylinder in order to start the engine, an electromagnetic force is generated. The coil 6a is energized, the contact 6b is closed, and the fuel pump 1 is energized via the second pump relay 6, regardless of the opening and closing of the first pump relay 5, and the fuel pump 1 is started.

Since the start of the fuel pump 1 via the first pump relay 5 is performed after the ignition key is inserted into the cylinder and the key is operated to the ON position of the ignition switch 4, the second pump relay 6 is started. Starting of the fuel pump 1 via the first pump relay 5 is always performed earlier than starting via the first pump relay 5.

Therefore, the ignition switch 4 is turned on.
The operation time of the fuel pump 1 from the start of the fuel pump 1 to the start of the engine (starter ON) can be secured longer than when the fuel pump 1 is started after the start. Therefore, the fuel pressure can be sufficiently increased before the engine is started (until fuel injection is started), whereby the fuel injection is stabilized and the exhaust properties at the time of starting can be improved.

When the device switch 7 is, for example, configured to use a seat belt insertion switch, after the driver gets into the vehicle, first fasten the seat belt, and then connect the ignition key to the cylinder. If you perform the operation of plugging in and starting the engine,
The fuel pump 1 can be started earlier than when the first pump relay 6 is opened and closed in conjunction with the key insertion switch.

When a door opening / closing switch is used as the device switch 7, when the driver opens the door to get into the vehicle and turns on the door opening / closing switch,
The fuel pump 1 is started, and the fuel pump is started at a point in time before the ignition key is inserted into the cylinder. Here, if the door is closed before the ignition switch 4 is turned on, the door opening / closing switch is turned off and the fuel pump 1 is temporarily stopped. Since the fuel pressure is increased in advance by the operation of, the fuel pressure increases in a short time after the ignition switch 4 is turned on and the fuel pump 1 is restarted. Even if the operation speed of the ignition key is high, the position of the ignition ON is increased. The engine can be started with a high fuel pressure even if the time from the operation to the start position is short.

The position of the device switch 7 is not only between the electromagnetic coil 6a and the battery 2 shown in FIG. 1 but also between the electromagnetic coil 6a and the ground as shown in the second embodiment in FIG. The configuration shown in FIG. 3 also has the same operation and effect as the first embodiment shown in FIG. By the way, as described above, when the power supply to the fuel pump 1 is controlled independently in conjunction with the ON / OFF of the device switch 7 that operates independently of the ON / OFF of the ignition switch 3, the device switch 7 Is ON, the fuel pump 1 is continuously operated even if the engine is not started.

Therefore, ON / OF of the device switch 7
If there is no restriction on the operation of the fuel pump 1 linked to F,
The pump operation with the engine stopped may take a long time, causing the battery 3 to run out or generating a large pump operation noise. Therefore, it is preferable to limit the operation time of the fuel pump 1 in conjunction with the device switch 7, and a third embodiment having such a configuration is shown in FIG.

In the drive circuit of the fuel pump shown in FIG. 4, a relay control unit 8 for controlling the energizing time of the electromagnetic coil 6b is provided between the device switch 7 and the electromagnetic coil 6b in the circuit configuration of FIG. There is an added configuration.
The relay control unit 8 is connected to the O
N to the electromagnetic coil 6a (fuel pump 1
If the device switch 7 is ON, the power supply to the electromagnetic coil 6a is interrupted when the time exceeds the predetermined time.

FIG. 5 is a flow chart showing the control function of the relay control unit 8 in step S1.
In step 1, ON / OFF of the device switch 7 is determined. When the device switch 7 is off, the process proceeds to step S14, and the second pump relay 6 is turned off.
When the device switch 7 is ON, step S
Proceeding to 12, it is determined whether a predetermined time has elapsed since the device switch 7 was turned on.

If within the predetermined time, step S13
Then, the second pump relay 6 is turned on. If the predetermined time has elapsed, the process proceeds to step S14, where the second pump relay 6 is turned off. The predetermined time is, as shown in FIG. 6, a time for delivering to the target pressure even when the fuel pressure rises slowly, in consideration of the variation of the fuel pressure rise with respect to the elapsed time from the start of the fuel pump 1. (Time (2)) is preferable.

Incidentally, as in the fourth embodiment shown in FIG.
The device switch 7 and the relay control unit 8 may be interposed between the electromagnetic coil 6b of the second pump relay 6 and the ground. Also, the device switch 7
As a method for restricting the operation time of the fuel pump 1 based on the above, the relay control unit 8 may have a function as shown in the flowchart of FIG.

The control function shown in the flowchart of FIG. 8 is based on the signal change (OFF → ON, O
N → OFF), and energize the electromagnetic coil 6a (energize the fuel pump 1) for an arbitrary time from the signal change. In step S31, it is determined whether or not the signal of the device switch 7 has changed.

If there is a change in the signal, the flow advances to step S32 to set 1 to the flag F. In the next step S33, the timer TIM for measuring the elapsed time is counted up. In step S34, the timer TI
It is determined whether or not the time measured by M is equal to or longer than a predetermined time. If it is within the predetermined time, the process proceeds to step S37, where the second pump relay 6 is turned on.

Until the time measured by the timer TIM becomes equal to or longer than a predetermined time, the flag F is kept at 1. Therefore, when it is determined that there is no signal change in step S31 at the next execution of this routine, step S35 is performed. And the flag F
Is determined to be 1, the process proceeds to step S33, and the second pump relay 6 is maintained in the ON state until the time measured by the timer TIM exceeds a predetermined time.

In step S34, the timer TIM
If it is determined that the measurement time is longer than the predetermined time, the process proceeds to step S36 to reset the timer TIM and the flag F to 0, and further proceeds to step S38 to turn off the second pump relay 6. . According to the above configuration, the operation time of the fuel pump 1 linked to the device switch 7 can be limited, and a switch that returns the signal state to the original state in a short time can be reliably used as the device switch 7. In each of the above embodiments in which the fuel pump 1 can be operated for a certain period of time, the first pump relay 5 that operates the fuel pump 1 in conjunction with the ignition switch 4 and the ignition switch 3
And the second pump relay 6 that operates the fuel pump 1 in conjunction with the device switch 7 that operates independently of the ON / OFF state of the switch. However, the second pump relay 6 may be configured with only one pump relay.

FIG. 9 shows a fifth embodiment composed of only one pump relay. In the circuit configuration shown in FIG. 9, a circuit in which an ignition switch 4 and an ECM 2 are connected in series between an electromagnetic coil 10a of a pump relay 10 for controlling energization of the fuel pump 1 and a battery 3, a device switch 7 and a relay A circuit in which the control units 8 are connected in series is provided in parallel.

In the configuration shown in FIG. 9, even when the pump relay 10 is not turned on by the ECM 2, the pump relay 10 is turned on by the device switch 7 and the relay control unit 8 to start the fuel pump 1.
The flowchart of FIG. 10 shows the drive control (control of the pump relay 10) of the fuel pump 1 in the circuit configuration of FIG.

In the flowchart of FIG. 10, the control by the ECM 2 and the control by the relay control unit 8 are not distinguished for convenience. Step S2
At 1, it is determined whether or not the ignition switch 4 is ON. If it is determined in step S21 that the ignition switch 4 is ON, the process proceeds to step S22.
Then, it is determined whether or not a predetermined time has elapsed since the ignition switch 4 was turned on. If it is within the predetermined time, the flow proceeds to step S26 to turn on the pump relay 10.
I do.

On the other hand, when the predetermined time has elapsed,
Proceeding to step S23, it is determined whether or not the engine is rotating. If the engine is rotating, the process proceeds to step S26.
If so, the process proceeds to step S27, where the pump relay 10 is turned off. On the other hand, if it is determined in step S21 that the ignition switch 4 is OFF, the process proceeds to step S24, where the ON / OFF of the device switch 7 is performed.
Is determined.

If the device switch 7 is off, the process proceeds to step S27, where the pump relay 10 is turned off.
If the device switch 7 is ON, step 2
The program proceeds to step S5, where it is determined whether or not a predetermined time has elapsed since the device switch 7 was turned on.

When the device switch 7 is OFF,
If it is ON but the predetermined time has elapsed, the process proceeds to step S27, and the pump relay 10 is turned OFF.
In the flowchart of FIG. 10, it is clear that the control based on the device switch 7 may be changed to the control shown in FIG. Further, in the configuration of FIG. 9, the relay control unit 8 can be omitted,
As described above, in order to avoid the rise of the battery 3 and the generation of the operation noise, it is preferable to include the relay control unit 8 that limits the operation of the fuel pump 1 in conjunction with the device switch 7 in time.

Further, as in the sixth embodiment shown in FIG. 11, the ECM 2, the device switch 7, and the relay control unit 8 may be provided in parallel between the electromagnetic coil 10a and the ground. FIG. 12 shows that the function of the relay control unit 8 is provided to the ECM 2 and the control unit is
7 shows a seventh embodiment.

In FIG. 12, the signals of the ignition switch 4 and the device switch 7 are respectively input to the ECM 2, and the ECM 2 performs the arithmetic processing shown in the flowchart of FIG.
・ Control OFF. As described above, if one unit controls the pump relay 10 (startup control of the fuel pump 1) in conjunction with the ignition switch 4 and the device switch 7, the fuel pressure is controlled based on the terminal voltage of the fuel pump 1. It is possible to control the operating conditions of the fuel pump 1 more finely, for example, by controlling it or linking it with a vehicle anti-theft device.

FIG. 13 shows an eighth embodiment in which a vehicle anti-theft device is combined. In FIG. 13, a vehicle antitheft device 12 is arranged between the electromagnetic coil 10a of the pump relay 10 and the ground, and the power supply to the electromagnetic coil 10a is controlled by switching means in the vehicle antitheft device 12. . The vehicle anti-theft device 12 receives a signal from the ECM 2 and a signal from the device switch 7. When the device switch 7 is turned on prior to turning on the ignition switch 4, the electromagnetic coil 10 is turned on.
The configuration for starting the fuel pump 1 by energizing a is the same as in the above embodiments, but when the vehicle anti-theft device 12 determines that there is a danger of theft, a signal from the ECM 2 or the device switch 7 is output. Irrespective of this, the power supply to the electromagnetic coil 10a is forcibly cut off.

For example, when the key insertion switch is the device switch 13, if the ECM 2 is started in a state where the key insertion switch is not operated, it is determined that there is a risk of theft. The power supply to the coil 10a is forcibly cut off. By the way, in the above embodiment, the operation of the fuel pump 1 linked to the device switch 7 is limited by time. However, it is possible to limit the operation based on the fuel pressure instead of the time.

The flowchart of FIG. 14 shows a ninth embodiment in which a restriction is made based on the fuel pressure. The flowchart of FIG. 14 is different from the flowchart of FIG. 10 only in step S25. In step S25 ', it is determined whether the fuel pressure detected by a fuel pressure sensor (not shown) is equal to or higher than a predetermined pressure. Then, even if the device switch 7 is in the ON state, when the fuel pressure becomes equal to or higher than the predetermined pressure, the pump relay is turned off and the operation of the fuel pump 1 is stopped.

According to this configuration, when the fuel pressure rises to a sufficient level for starting the engine, the operation of the fuel pump 1 linked to the device switch 7 is stopped. It can be operated, and the rise of the battery 3 and the generation of a loud operation sound can be more effectively prevented. Here, it is also possible to combine the restriction based on the elapsed time and the restriction based on the fuel pressure, and a tenth embodiment having such a configuration is shown in the flowchart of FIG.

In step S25a, it is determined whether or not the fuel pressure is equal to or higher than a predetermined pressure. If the fuel pressure has not reached the predetermined pressure, the process proceeds to step S25b. Step S
25b, the fuel pump 1 based on the device switch 7
It is determined whether a predetermined time has elapsed since the start of the fuel pump. If the predetermined time has elapsed even if the fuel pressure has not reached the predetermined pressure, the routine proceeds to step S27, where the fuel pump 1
Stop the operation of.

Therefore, it is possible to prevent the fuel pump 1 from being operated for a long time in a state where the fuel pressure does not rise normally for some reason. In the configuration in which the fuel pump 1 is started in conjunction with the device switch, a logical sum or a logical product of a plurality of device switches may be calculated, and the fuel pump 1 may be started based on a result of the logical calculation. .

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram showing a first embodiment.

FIG. 2 is a flowchart illustrating first pump relay control according to the first embodiment.

FIG. 3 is a circuit configuration diagram showing a second embodiment.

FIG. 4 is a circuit configuration diagram showing a third embodiment.

FIG. 5 is a flowchart illustrating a second pump relay control according to the third embodiment.

FIG. 6 is a graph showing an increase characteristic of a fuel pressure after starting a fuel pump.

FIG. 7 is a circuit configuration diagram showing a fourth embodiment.

FIG. 8 is a flowchart showing control for limiting a fuel pump operation time by using a signal change of a device switch as a trigger.

FIG. 9 is a circuit diagram showing a fifth embodiment.

FIG. 10 is a flowchart illustrating pump relay control according to a fifth embodiment.

FIG. 11 is a circuit diagram showing a sixth embodiment.

FIG. 12 is a circuit diagram showing a seventh embodiment.

FIG. 13 is a circuit diagram showing an eighth embodiment.

FIG. 14 is a flowchart showing a restriction by a fuel pressure of a pump operation interlocked with a device switch.

FIG. 15 is a flowchart showing a restriction by a fuel pressure and a time of a pump operation interlocked with a device switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fuel pump 2 ... Engine control module (ECM) 3 ... Battery 4 ... Ignition switch 5 ... 1st pump relay 6 ... 2nd pump relay 7 ... Device switch 8 ... Relay control unit 10 ... Pump relay

Claims (7)

[Claims] 1. A drive control apparatus for a vehicle fuel pump, wherein an electric fuel pump is started in conjunction with a switch of a device which operates independently of ON / OFF of an ignition switch. 2. The drive control device for a vehicle fuel pump according to claim 1, wherein the device switch is a switch that operates earlier than the ignition switch when the engine is started. 3. The drive control device for a vehicle fuel pump according to claim 1, wherein an operation time of the fuel pump in conjunction with the device switch is limited when the engine is stopped. 4. The vehicle fuel according to claim 1, wherein the operation of the fuel pump in conjunction with the device switch is stopped when the fuel pressure reaches a predetermined value when the engine is stopped. Drive control device for the pump. 5. An on / off switch of said ignition switch as a pump relay for switching energization of said fuel pump.
5. The device according to claim 1, further comprising a first pump relay that opens and closes contacts based on an OFF signal, and a second pump relay that opens and closes contacts in conjunction with the device switch. A drive control device for a vehicle fuel pump according to any one of the preceding claims. 6. A switch according to claim 1, wherein a contact of one of the pump relays for switching energization of the fuel pump is opened and closed based on signals from the ignition switch and the device switch. A drive control device for a vehicle fuel pump according to any one of the preceding claims. 7. The vehicle according to claim 6, wherein the opening and closing of the contact based on the signals of the ignition switch and the device switch is performed via a vehicle anti-theft device.
A drive control device for a vehicle fuel pump according to any one of the preceding claims.