JP2005264901A - Power supply control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply control device for preventing the run-out of a battery when an operator moves apart from a machine for a long time with an engine starting switch remained in an on-position without starting an engine. <P>SOLUTION: A relay circuit 24 is provided between the battery 21 and a controller 23, and the engine starting switch 25 is provided on the relay circuit 24. The engine starting switch 25 switches from an off-position into the on-position to close the relay circuit 24 and supply a current from the battery 21 to the controller 23, and it switches from the on-position into a start-position to start the engine 22. A condition determining part 26 is connected to the relay circuit 24. The condition determining part 26 opens the relay circuit 24 when the engine is not started in spite that the engine starting switch 25 is in the on-position and the condition that a monitor 30 is not used is kept on for a preset time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a power supply control device including an engine start switch having an off position, an on position, and a start position.

  In a road paving machine such as an asphalt finisher, electric power is supplied from a power source to an engine start circuit via an engine start switch or the like (for example, see Patent Document 1).

FIG. 4 shows a conventional engine start switch 1, which is a switch for selecting each position by adjusting a knob 3 provided on the rotating body 2 to any one of an off position, an on position, and a start position. When starting the engine, the engine start switch 1 is turned from the off position to the on position so that current is supplied from the battery to the controller (electronic control unit), and then the engine start switch 1 is moved from the on position to the start position. The engine is started by rotating the wheel.
Utility Model Registration No. 2568498 (page 4, Fig. 1)

  In such a road paving machine, the work performed by the operator with the engine start switch 1 in the ON position is limited. The hydraulic excavator can use an air conditioner, radio, etc., but the road paving machine has no function.

  For this reason, carelessness has been observed such as the operator leaving the engine start switch 1 in the on position for a long time without starting the engine, or leaving the engine start switch 1 in the on position during transportation. In these cases, there is a problem in that the battery is raised because current is continuously supplied to the controller or the like.

  The present invention has been made in view of these points, and an object of the present invention is to provide a power supply control device that prevents a battery from being raised due to carelessness of an operator.

  The invention according to claim 1 supplies a current from the battery to the controller via the relay circuit by switching from an off position to an on position by a relay circuit provided between the battery mounted on the fuselage and the controller, An engine start switch for starting the engine by switching from the on position to the start position, and a relay circuit is opened at least when the engine has not been started for a predetermined time despite the engine start switch being in the on position. A power control device including a condition determination unit, and the engine start switch when the operator leaves the aircraft for a long time without starting the engine and the engine start switch is in the ON position, or when the aircraft is transported Is in the on position, at least the engine has not been started for a predetermined time To come, the condition judging section, will open the relay circuit between the battery and the controller, to prevent inadvertently operator, the battery is increased by the power consumption, such as the controller.

  According to a second aspect of the present invention, the condition determination unit in the power supply control device according to the first aspect of the invention is a monitor that displays the state of the fuselage without starting the engine even though the engine start switch is in the on position. If the relay circuit is opened when the engine is not used for a predetermined time, and the engine does not start and the monitor is not used, the engine start switch is in the ON position. Since it is difficult to notice this, the condition determination unit forcibly opens the relay circuit between the battery and the controller after a predetermined time has elapsed, thereby preventing the battery from rising due to power consumption by the controller or the like. .

  According to a third aspect of the present invention, the condition determination unit in the power supply control device according to the first or second aspect has no output signal from the engine speed sensor for detecting the engine rotation speed and is driven by the engine to generate electric power. Is detected and the engine oil pressure switch for detecting the engine oil pressure is detected to be off, and it is determined that the engine is not started. It detects that there is no output signal from the sensor or a signal from the alternator and the engine oil pressure switch is off, and after accurately grasping the state where the engine is not started, the power is turned off.

  According to a fourth aspect of the present invention, after the condition determination unit in the power supply control device according to any one of the first to third aspects opens the relay circuit, the engine start switch is turned off, and then the engine start switch is turned on. If the relay circuit closes and the engine start switch is in the ON position, but the relay circuit opens and the power is turned off, the engine start switch is temporarily turned off. The power is turned on by turning on after returning to the position.

  According to the first aspect of the present invention, when the operator leaves the aircraft for a long time without starting the engine and the engine start switch is in the ON position, or when the engine is being transported, the engine start switch is in the ON position. In this case, the condition determination unit opens the relay circuit between the battery and the controller at least when the engine has not been started for a predetermined period of time. Can prevent the battery from going up.

  According to the second aspect of the present invention, when the engine does not start and the monitor is not used, it is difficult to notice even if the engine start switch is in the ON position. However, by forcibly opening the relay circuit between the battery and the controller after elapse of a predetermined time, it is possible to effectively prevent the battery from being raised due to power consumption by the controller or the like.

  According to the third aspect of the present invention, the condition determination unit detects that the engine oil pressure switch is off by detecting that there is no output signal from the engine speed sensor or a signal from the alternator, and the engine is not started. It is possible to turn off the power after accurately grasping.

  According to the fourth aspect of the present invention, when the relay circuit is opened and the power is turned off even though the engine start switch is in the on position, the engine start switch is once returned to the off position and then turned on. By doing so, the power supply can be turned on.

  The present invention will be described below with reference to the embodiment shown in FIGS.

  FIG. 3 shows a fuselage 11 of an asphalt finisher as a road paving machine, and a hopper 13 for accommodating a composite material is provided at the front of the vehicle main body 12, and the rear of the vehicle main body 12 from the lower side of the hopper 13. A feeder conveyor 14 for transferring the mixture is provided, a screed device 15 is connected to the rear portion of the vehicle body 12, and a screw conveyor device 16 is provided in the vehicle width direction between the vehicle body 12 and the screed device 15, Then, the composite material transferred from the hopper 13 to the rear portion of the vehicle main body 12 by the feeder conveyor 14 is diffused in the screed width direction by the screw conveyor device 16, and is formed into a predetermined road width and pavement thickness by the screed device 15.

  FIG. 1 shows a power supply control device mounted on a body 11 of this asphalt finisher, and a relay circuit 24 is provided between a battery 21 mounted on the body 11 and a controller 23 that electronically controls the body 11 or the engine 22. An engine start switch 25 is provided for the relay circuit 24.

  This engine start switch 25 closes the relay circuit 24 by switching from the off position to the on position and supplies current from the battery 21 to the controller 23. Also, the engine start switch 25 energizes the engine start circuit by switching from the on position to the start position. Thus, the engine 22 is started.

  In addition, with respect to the relay circuit 24, a condition determination for opening the relay circuit 24 when at least a state where the engine 22 is not started despite the engine start switch 25 being in the ON position continues for a set predetermined time. Part 26 is connected.

  The condition determination unit 26 detects an engine speed sensor 27 that detects the engine rotation speed, an alternator 28 that is driven by the engine 22 to generate electric power, and an engine oil pressure discharged from an engine oil pump (not shown). An engine oil pressure switch 29 and a monitor 30 for displaying the state of the airframe 11 are connected.

  The condition determination unit 26 uses the monitor 30 even when the engine start switch 25 is in the ON position (YES in step 1) and the engine 22 has not started (YES in step 2). When the state of not being used (YES in step 3) continues for a predetermined time (YES in step 4), the relay circuit 24 is opened to turn off the power of the controller 23 and the like (step 5).

  Thereby, for example, when the operator does not start the engine 22 and leaves the engine start switch 25 in the ON position for a long time, or the engine start switch 25 is in the ON position during transport of the aircraft. In this case, the condition determination unit 26 opens the relay circuit 24 between the battery 21 and the controller 23 when the engine 22 has not been started for a predetermined time. It is possible to prevent the battery 21 from going up.

  In particular, when the engine 22 does not start and the monitor 30 is not used, even if the engine start switch 25 is in the ON position, it is difficult to notice that, so the condition determination unit 26 is By forcibly opening the relay circuit 24 between the battery 21 and the controller 23 after the elapse of time, it is possible to effectively prevent the battery 21 from rising due to power consumption by the controller 23 or the like.

  Next, FIG. 2 is a flowchart showing in more detail the control procedure processed by the condition determination unit 26. The condition determination unit 26 is in spite of the engine start switch 25 being in the ON position (YES in step 11). ) There is no output signal from the engine speed sensor 27 for detecting the engine speed (YES in step 12), and there is no signal from the alternator 28 driven by the engine 22 to generate electric power, that is, no pulse signal (YES in step 13). Further, it is detected that the engine oil pressure switch 29 for detecting the engine oil pressure is OFF (YES in step 14), and from this, it is accurately determined that the engine 22 has not been started, and the monitor When 30 is not used (YES in step 15) and continues for the set time (YES in step 16), Turning off such as a controller 23 opens the 24 (step 17).

  Further, when power is restored, the engine start switch 25 is turned off (YES in step 18), and then the engine start switch 25 is turned on (YES in step 19). Closes the relay circuit 24 and turns on the power (YES in step 20).

  In this way, the condition determination unit 26 detects that there is no output signal from the engine speed sensor 27 or a signal from the alternator 28, and that the engine oil pressure switch 29 is off, and the engine 22 has not started. It is possible to turn off the power after accurately grasping.

  Furthermore, when the relay circuit 24 is opened and the power is turned off even though the engine start switch 25 is in the ON position, the engine start switch 25 is temporarily returned to the OFF position, and then the engine start switch 25 is turned on. By turning on again, the power can be returned to the on state.

  As described above, in the road paving machine, when the engine start switch 25 is in the ON position, that is, when the engine 22 is left untreated for a long time or when the engine start switch 25 is being transported. If the machine 11 is forgotten to be turned off, the power of the airframe 11 is automatically turned off, thereby enabling battery protection that prevents the battery 21 from rising due to carelessness of the operator.

  The present invention is not limited to road paving machines, and can be applied to other vehicles.

It is a block diagram which shows one Embodiment of the power supply control apparatus which concerns on this invention. It is a flowchart which shows the control procedure of a power supply control apparatus same as the above. It is a side view of the road paving machine equipped with the same power supply control device. It is a front view which shows an engine start switch.

Explanation of symbols

11 Aircraft
21 battery
22 engine
23 Controller
24 Relay circuit
25 Engine start switch
26 Condition judgment part
27 Engine speed sensor
28 Alternator
29 Engine oil pressure switch
30 monitors

Claims (4)

A relay circuit provided between the battery mounted on the aircraft and the controller;
An engine start switch for supplying current from the battery to the controller via the relay circuit by switching from the off position to the on position, and starting the engine by switching from the on position to the start position;
And a condition determination unit that opens a relay circuit when at least a state in which the engine has not started continues for a predetermined time despite the engine start switch being in the ON position. The condition determination unit
The relay circuit is opened when the engine does not start and the monitor that displays the state of the aircraft is not used for a predetermined period of time despite the engine start switch being in the ON position. The power supply control device according to claim 1. The condition determination unit
There is no output signal from the engine speed sensor that detects the engine speed.
And there is no signal from the alternator driven by the engine to generate electricity,
And detecting that the engine oil pressure switch that detects the engine oil pressure is off,
The power supply control device according to claim 1, wherein it is determined that the engine is not started. The condition determination unit
After opening the relay circuit,
The engine start switch is turned off,
After that, when the engine start switch is turned on,
The power supply control device according to claim 1, wherein the relay circuit is closed.

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