JPS63116958A - Driver for prime mover - Google Patents

Abstract

PURPOSE:To aim at an antitheft measure, by making a relay, opening or closing a starter circuit part, and a control circuit, operating an electronic governor driving part, both being free operation by a code input unit, and setting a starter and a governor down to nonoperation unless the preregistered code is inputted. CONSTITUTION:A starter circuit 2 is made to be freely driven via a battery 1 and a battery relay 4, and operation and nonoperation of the starter circuit are carried out by opening or closing a relay 5. Separately there is provided with an electronic governor 6 as an injection quantity controlling device for adjusting a fuel injection quantity. The relay 5 and the electronic governor 6 of the starter circuit 2 perform their operation or nonoperation with a controller 7, and the control is carried out by a code input unit 8. When the preregistered code is inputted, the starter circuit is driven, the electronic governor 6 is operated, thus drive of a prime mover takes place. So far as there is no input of the preregistered code, the prime mover is made undrivable, thus an antitheft measure is well promotable.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a driving device for a prime mover provided in a vehicle such as a construction machine.

<Prior Art> FIG. 2 is a diagram showing the principle circuit of a conventional driving device for a prime mover, and this driving device is installed in, for example, a hydraulic excavator. In this figure, 1 is a battery, 2 is a starter circuit, 3 is a key switch, and 4 is a battery relay. In this drive device, when the key switch 3 is turned on, the battery relay 4 is driven, an electric circuit including the battery 1, starter circuit 2, key switch 3, and battery relay 4 is closed, and the starter circuit 2 is activated. Then, the prime mover (not shown) starts, and fuel is supplied to the prime mover via a throttle lever (not shown), etc., so that the prime mover is driven.

In addition, the hydraulic pump operates in conjunction with the drive of this prime mover,
Pressure oil from this hydraulic pump is supplied to the boom cylinder, arm cylinder, packet cylinder, travel motor, swing motor, etc. In addition to traveling and swinging, the front attachment consisting of the boom, arm, and packet is driven to excavate earth and sand. Perform work, etc.

<Problems to be Solved by the Invention> Incidentally, a hydraulic excavator equipped with a prime mover drive device configured as described above is often left at a work site for a long period of time due to the nature of the work.

Conventionally, for hydraulic excavators that have been abandoned in this way, the conductors before and after the key switch 3 of the drive device described above are cut, and the thus cut conductors are connected to each other to require the key to be turned on. There has been a problem in that the starter circuit 2 is operated without the hydraulic excavator being activated to drive the prime mover, and as a result, the hydraulic excavator runs and is stolen.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and its purpose is to provide a driving device for a prime mover in which the prime mover cannot be driven by cutting or connecting conductive wires, etc.

Means for Solving Problems〉 An injection amount control means for controlling the injection amount of fuel supplied to an electronically controlled prime mover, a starter circuit for starting the electronically controlled prime mover, and an injection amount control means and a starter circuit for starting the electronically controlled prime mover. Both of the circuits are connected to each other, and include a control device capable of outputting a drive signal for driving the injection amount control means and an operation signal for activating the starter circuit, and a code input device connected to this control device. It includes a determining means for determining whether the code signal outputted from the code input device matches a code set in advance, and if they match, a drive signal for driving the injection amount control means and an actuation signal for operating the starter circuit. This is a configuration that outputs .

Since the present invention is configured as described above, the determination means of the control device uses the electronically controlled system only when the code signal output from the code input device matches the code set in advance. If the injection amount control means that controls the injection amount of fuel supplied to the prime mover is driven, and therefore the code signal is not input to the control device, or if the code signal is not input to the predetermined degree.
If the codes do not match, and even if the starter circuit is activated by cutting and connecting the conductor, fuel will not be supplied to the prime mover, and as a result, the prime mover will not be driven, and the drive device of this prime mover will not be activated. It is not possible to drive a vehicle equipped with

<Embodiment> Hereinafter, a driving device for a prime mover according to the present invention will be explained based on the drawings.

FIG. 1 is a diagram showing the principle circuit of one embodiment of the present invention.

A driving device for a prime mover constituting this embodiment is provided in, for example, a hydraulic excavator. In this diagram,
1 is a battery, 2 is a starter circuit, and 4 is a battery relay, which are the same as those described above. Further, 5 is a relay interposed between conductive wires connecting the starter circuit 2 and the battery relay 4, and 6 is an injection amount control means for controlling the injection amount of fuel supplied to an electronically controlled prime mover (not shown), such as a fuel injection An electronic governor 7 that electronically controls the flow rate of the valve outputs a drive signal to drive the electronic governor 6 and an actuation signal that activates the starter circuit 2.
That is, it is a control device capable of outputting a signal to drive the relay 5, and has a memory function and a logical operation function. Reference numeral 8 denotes a code input device, such as a keyboard input device, which is connected to the control device 7, and outputs a code signal to the control device 7 by pressing the keyboard.

Note that the above-mentioned control device 7 includes a determining means for determining whether the cipher signal outputted from the keyboard input device 8 matches a preset cipher.

In the embodiment configured in this way, the encrypted signal from the keyboard input device 8 is input to the control device 7, and the determination means of the control device 7 determines in advance the encrypted signal output from the keyboard input device 8. It is determined whether it matches the set code, and if it matches, a signal is output to the relay 5, which is driven, and the starter circuit 2 is activated, as well as a lever (not shown) that controls the rotation speed of the prime mover. A drive signal is output to the electronic governor 6 in response to the amount of operation, and fuel is injected into the prime mover (not shown) to drive the prime mover, and as described above, the vehicle travels, turns, drives the front attachment, etc. .

If someone intends to steal the hydraulic excavator equipped with this embodiment, they can cut the lead wires before and after the relay 5.
When these conductors are connected, the starter circuit 2 operates, but unless the codes in the discrimination means of the control device 7 match, a drive signal is not output to the electronic governor 6, that is, the drive signal is not output to the prime mover (not shown). Fuel is not supplied, the prime mover is not driven, and the hydraulic excavator cannot run.

In the above embodiment, a keyboard input device 8 is provided as a code input device, but this keyboard input device 8 can also be used as another monitor device provided in the hydraulic excavator.

Further, in the above embodiment, the keyboard input device 8 is provided as a code input device, but the present invention is not limited to this. It may also be configured by

<Effects of the Invention> Since the prime mover drive device of the present invention is configured as described above, the prime mover cannot be driven by cutting or connecting conductors unless the codes in the control device match. Therefore, the vehicle equipped with this prime mover drive device cannot be driven, which has the effect of preventing the vehicle from being stolen.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a circuit principle of an embodiment of a driving device for a prime mover according to the present invention, and FIG. 2 is a diagram showing a circuit principle of a conventional driving device for a prime mover. 1...Battery, 2...Starter circuit, 4...Battery relay, 5...
Relay, 6...Electronic governor (injection amount control means)
, 7... Control device, 8... Keyboard input device (cipher input device). Figure 1 (B sound 1 manual effort and A U) Figure 2

Claims (1)

[Claims] (1) An injection amount control means that controls the injection amount of fuel supplied to the electronically controlled prime mover, a starter circuit that starts the electronically controlled prime mover, and both of these injection amount control means and the starter circuit are connected. , a control device capable of outputting a drive signal for driving the injection amount control means and an operation signal for activating the starter circuit, and a code input device connected to the control device, and a code input device connected to the control device. and a determination means for determining whether the code signal matches a preset code, and if they match, outputs a drive signal for driving the injection amount control means and an actuation signal for operating the starter circuit. A prime mover drive device characterized by: