JP4344301B2 - Vehicle power supply control device and work machine - Google Patents

Description

  The present invention relates to a vehicle power supply control device having a key switch capable of switching at least a stop of an engine and electrical components and a start of the engine and electrical components, and a work machine including the same.

  2. Description of the Related Art Conventionally, a hydraulic excavator as a work machine includes a machine body on which a cab that divides a cab is mounted, a work device provided in the machine body, a hydraulic actuator provided in each of the machine body and the work device, The engine includes an engine that drives a hydraulic pump that supplies and discharges hydraulic oil to and from the hydraulic actuator, various electrical components such as a light, a radio, and an air conditioner, and a battery that supplies power to the starter motor and various electrical components of the engine. And an operator starts or stops an electrical component and an engine with the key switch provided in the cab. The key switch is provided with, for example, an off position for stopping the electrical component and the engine, an on position for supplying power to the electrical component, and a star position for starting the engine.

  Particularly in a hydraulic excavator, there are situations where various electrical components are in an operating state and the engine of the work machine is stopped. In this situation, since the charging of the battery by the power generation of the alternator, which is a generator driven by the operation of the engine, is stopped, the capacity of the battery is reduced.

  However, when restarting the engine, the key switch is changed from the off position to the start position via the on position, so that when the key switch is in the on position, current is supplied to the electrical components, and the key switch When the start position is reached, power is supplied to the starter motor of the engine, and power for various electrical components and power for starting the engine are sequentially required for the battery. When the electrical component is turned on and the capacity of the battery is reduced, the power supply load from the battery temporarily increases. And there is a problem that the life of the battery is reduced by increasing the load of power supply from the battery.

  On the other hand, there is a case where the radio is listened to without turning on the engine or the light is turned on, and the power supply from the battery cannot be generally stopped when the key switch is on.

Therefore, when the control means determines that the engine is operating by detecting the engine sound, noise, vibration, etc. that are generated when the engine is started by various sensors, the control means determines that the engine is operating. A power supply control device that supplies power from a battery to an electrical component is known (for example, see Patent Document 1).
JP 2003-154905 A (page 4-7, FIG. 1)

  However, engine noise, noise, or vibration detected by the sensor in the power supply control device described above is generated when the engine is started, that is, when the starter motor is rotating, and then the engine is fully operated. The above-mentioned power supply control device does not determine whether or not the power supply control device, for example, even if the engine stalls immediately after starting, the power is supplied to the electrical components. There is a problem that there is a risk of reducing.

  SUMMARY An advantage of some aspects of the invention is that it provides a vehicular power supply control device and a work machine that can alleviate a reduction in battery life.

The invention according to claim 1 is a key switch capable of switching between stop and start of an engine and electrical components mounted on a vehicle, an energy saving mode switch for turning on / off an energy saving mode , and starting the engine and electrical components by the key switch. When the energy saving mode switch is turned on, only the power for starting the engine and the power for a predetermined electrical component specified in advance are supplied from the battery, and the battery is driven by starting the engine. After the operation of the generator for charging the battery is started, the supply of power from a battery for a predetermined electrical component other than the predetermined electrical component specified in advance is started , and the energy saving mode is turned off by the energy saving mode switch. If it is, the power source for starting the engine from the battery and the power source for the specified electrical components and electrical components other than the specified electrical components The a power supply control apparatus for a vehicle and a control means for supplying respectively, when the engine is started and electric equipment by the key switch, when the energy saving mode is turned on in the energy saving mode switch, the control means However, until the operation of the generator is started by starting the engine, power is not supplied from the battery to predetermined electrical components other than the predetermined electrical components specified in advance. When the energy saving mode is turned off by the energy saving mode switch, the control means supplies the power for starting the engine and the power of the electrical components from the battery. By using the energy-saving mode switch to turn on / off the energy-saving mode by making it compatible with normal operation Easily it is can be switched.

The invention described in claim 2 supplies a vehicle, a working device operably provided in the vehicle, an engine mounted on the vehicle, an electrical component, a power source for starting the engine, and a power source for the electrical component, respectively. A vehicle power supply control that mitigates a reduction in battery life, comprising a working battery, a generator driven by an engine to charge the battery, and the vehicle power supply control device according to claim 1. By providing the device, the number of times of battery replacement or the like is reduced, maintenance on the work machine including the work device is facilitated, and work interruption due to battery consumption is eliminated.

According to the first aspect of the present invention, when the engine and electrical components are started by the key switch, when the energy saving mode is on, the control means starts the operation of the generator by starting the engine. Until the battery power is not supplied to the specified electrical components other than the specified electrical components specified in advance, the battery is not overloaded, reducing battery life and reducing energy consumption. When is turned off, the control means turns on and off the energy saving mode with the energy saving mode switch by supplying the power for starting the engine and the power of the electrical equipment from the battery to correspond to the normal operation. Thus, the battery usage can be easily switched.

According to the second aspect of the present invention, the vehicle power supply control device that mitigates the reduction in battery life can be provided, so that the number of times of battery replacement can be reduced, and maintenance on the work machine equipped with the work device is easy. And no interruption of work due to battery exhaustion.

  Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.

  FIG. 2 shows a hydraulic excavator as a working machine, and an upper swing body 13 is turnably provided via a swing bearing portion 12 of the lower traveling body 11. A cab 14 that divides a cab with a monitor and a seat that are not used is mounted. A work device 15 for excavating work is operatively mounted on the front other side of the upper swing body 13, and an engine and the engine are driven on the rear portion of the upper swing body 13. A power device such as a hydraulic pump is mounted and covered with a power device cover 16. The lower traveling body 11 and the upper turning body 13 constitute a machine body 17 as a vehicle.

  Further, the working device 15 is supported by the upper swing body 13 so that the base end portion of the boom 21 can be pivoted in the vertical direction, and the proximal end portion of the arm 22 can be pivoted inward and outward in the tip portion of the boom 21. A bucket 23 is pivotally supported at the tip of the arm 22 so as to be rotatable in the opening / closing direction.

  The boom 21 is rotated in the vertical direction by a boom cylinder 24 provided between the upper swing body 13 and the arm 22 is rotated inward and outward by an arm cylinder 25 provided between the boom 21 and The bucket 23 is rotated in the opening / closing direction by a bucket cylinder 26 and a linkage 27 provided between the bucket 23 and the arm 22.

  FIG. 1 shows the internal structure of a hydraulic excavator. A key switch 31, an engine 32, an alternator 33 as a generator, a battery 34, a controller 35 as a control means, an energy saving mode switch 36, an interlock switch 37, and an electrical component 38 are shown. A vehicle power supply control device 39 is configured by the key switch 31, the controller 35, and the like.

  The key switch 31 is provided around the driver's seat in the driver's cab, and can be sequentially switched between the off position, the on position, and the start position by rotating in the circumferential direction with the key inserted.

  The off position is a position where each of the engine 32 and a part of the electrical component 38 is stopped.

  The on position is a position where each of the engine 32 and the electrical component 38 is in an operating state.

  The start position is a position where each of the engine 32 and a part of the electrical component 38 is started. Then, the key switch 31 rotated to the start position automatically returns to the on position when the operator releases the key.

  The engine 32 includes a starter motor (not shown) for starting. The engine 32 is started by supplying power to the engine starter from the battery 34 and driving the starter motor. The engine 32 drives a hydraulic pump (not shown) to supply and discharge hydraulic oil stored in the hydraulic oil tank to and from the cylinders 24, 25, and 26, and to drive the alternator 33.

  The alternator 33 is driven by the engine 32 and charges the battery 34.

  The battery 34 supplies power for starting to the engine 32 and power to the electrical component 38.

  The controller 35 has a circuit board including various ICs and controls the drive of the engine 32 and various electrical components 38.

  The energy saving mode switch 36 is connected to the controller 35 and sets the energy saving mode on / off by an external operation of the operator.

  The interlock switch 37 is turned on / off by the controller 35, and turns on / off the supply of power from the battery 34 to a part of the electrical component 38.

  The electrical component 38 includes an air conditioner 38a, a light 38b, a radio 38c, a neutral start circuit 38d, a monitor 38e, a horn 38f, and the like.

  When the energy saving mode switch 36 is off, the air conditioner 38a, the light 38b, and the radio 38c are supplied with power from the battery 34 with the key switch 31 in the on position, and when the energy saving mode switch 36 is on, the alternator 33 is supplied. The power is not supplied from the battery 34 until the power is generated.

  Furthermore, the neutral start circuit 38d can start the engine 32 only when the operation of a hydraulic circuit (not shown) using the engine 32 as a power source is locked and a lock lever (not shown) that can be released is locked. Therefore, the monitor 38e is designated in advance so that power is supplied from the battery 34 and energized with the key switch 31 in the on position regardless of whether the energy saving mode switch 36 is on or off.

  Further, the horn 38f is designated in advance so that power is supplied from the battery 34 regardless of the position of the key switch 31.

  Next, the control of the embodiment will be described in detail with reference to the flowchart shown in FIG.

  First, when the operator rotates the key switch 31 from the off position to the start position in order to start the engine 32, the controller 35 determines whether or not the key switch 31 is in the on position (step 1). The process returns to step 1 until the controller 35 determines that the key switch 31 has entered the ON position.

  If the controller 35 determines that the key switch 31 has entered the on position, the controller 35 supplies power from the battery 34 to the neutral start circuit 38d and the monitor 38e, and the energy saving mode switch 36 is turned on or off. That is, whether the energy saving mode or the normal mode is selected by the energy saving mode switch 36 is determined (step 2).

  In this step 2, when the controller 35 determines that the energy saving mode switch 36 is off, the controller 35 turns on the interlock switch 37 to turn on the power from the battery 34 to the air conditioner 38a, the light 38b, the radio 38c, and the like. Supplied (step 3).

  Further, the controller 35 determines whether or not the key switch 31 has entered the start position (step 4), and returns to step 4 until the controller 35 determines that the key switch 31 has entered the start position. When the controller 35 determines that the engine has entered, the starting power is supplied from the battery 34 to the starter motor of the engine 32, the engine 32 is started by driving the starter motor (step 5), and the key switch 31 is turned on. Automatically return to position.

  On the other hand, when the controller 35 determines in step 2 that the energy saving mode switch 36 is on, the controller 35 determines whether the key switch 31 has entered the start position (step 6), and the key switch 31 starts. The controller 35 returns to step 6 until the controller 35 determines that it has entered the position, and when the controller 35 determines that the key switch 31 has entered the start position, the starter motor is supplied with power for starting the engine from the battery 34. The engine 32 is started by driving the starter motor (step 7).

  Thereafter, the controller 35 detects whether or not the power generation of the alternator 33 has been started (step 8). If the controller 35 determines that there is no power generation of the alternator 33, it is determined that the engine 32 has failed to start. Then, power is not supplied to the air conditioner 38a, the light 38b, the radio 38c, etc., and the process returns to step 2.

  On the other hand, if the controller 35 determines in step 8 that power generation by the alternator 33 has started, the controller 35 determines whether or not a predetermined time has elapsed (step 9), and step 9 is continued until the predetermined time has elapsed. After the repetition, the controller 35 turns on the interlock switch 37, power is supplied from the battery 34 to the air conditioner 38a, the light 38b, the radio 38c, etc., and the air conditioner 38a, the light 38b, the radio 38c, etc. are started (steps). Ten). Note that the predetermined time in step 9 can be arbitrarily set.

  Next, the function and effect of the embodiment will be described.

  In the above-described embodiment, when the energy saving mode is turned on by the energy saving mode switch 36, the battery 34 is charged when the engine 32, the air conditioner 38a, the light 38b, the radio 38c, and the like are started by the key switch 31. The configuration is such that power is not supplied from the battery 34 to the air conditioner 38a, the light 38b, the radio 38c, and the like until the operation of the alternator 33 is started by the start of the engine 32, that is, until the engine 32 is completely started.

  For this reason, power is supplied from the battery 34 to the air conditioner 38a, the light 38b, the radio 38c, etc. in a state where the battery 34 is not charged by the alternator 33 regardless of the energization state of the electrical component 38 when the engine 32 is stopped. And the battery 34 is not subjected to an unnecessarily heavy load, and the reduction in the life of the battery 34 can be mitigated.

  In particular, when the engine 32 is stopped, the power generation of the alternator 33 is also stopped, so when the air conditioner 38a, the light 38b, the radio 38c, etc. are energized while the engine 32 is stopped, the discharge becomes relatively large while the battery 34 is not charged. Therefore, since the capacity of the battery 34 is reduced, even if the battery 34 is used when the engine 32 is stopped by providing the energy saving mode as in the above embodiment, the engine 32 is restarted. The load on the battery 34 can be minimized.

  In addition, since the power from the battery 34 is most needed when the engine 32 is started, when the energy saving mode is on, power is supplied from the battery 34 to the air conditioner 38a, the light 38b, the radio 38c, etc. when the engine 32 is started. By not supplying power, the power of the battery 34 can be secured and the engine 32 can be started reliably.

  Further, by turning on / off the energy saving mode by the energy saving mode switch 36, when the energy saving mode is turned on, the battery 34 starts to charge the air conditioner 38a, the light until the battery 34 starts to be charged by driving the alternator 33 by starting the engine 32. 38b and radio 38c, etc. are not supplied with power, and when the energy saving mode is off, the power for starting engine 32 and the air conditioner 38a, light 38b, radio 38c, etc. are supplied from battery 34 for normal operation. Accordingly, the usage method of the battery 34 can be easily switched only by turning on / off the energy saving mode switch 36. For example, a monitor display before starting the engine can be performed by turning off the energy saving mode.

  When the engine 32 is frequently turned on and off, such as when a so-called auto idle stop circuit is provided that automatically stops idling of the engine 32, the load on the battery 34 increases. By adopting the power supply control device 39 and turning on the energy saving mode, the reduction in the life of the battery 34 can be reliably mitigated.

  In addition, by providing the vehicle power supply control device 39 in the work machine, it is not necessary to frequently charge or replace the battery 34, and maintenance in the work machine including the work device 15 can be facilitated. There is no interruption of work due to the battery 34 being consumed.

In the above embodiment, the vehicle power supply control device 39 is provided in the hydraulic excavator. However, the vehicle power supply control device 39 is provided in a vehicle such as an automobile other than various other work machines or work machines. It is also possible.

  Furthermore, the electrical component 38 that is energized regardless of the position of the key switch 31, the electrical component 38 that is energized when the key switch 31 is in the on position regardless of whether the energy saving mode is on, or the engine 32 is completely activated when the energy saving mode is on. In addition to the above, the electrical component 38 that is not supplied with power from the battery 34 until the start can be arbitrarily designated in advance.

1 is a block diagram illustrating an embodiment of a vehicle power supply control device according to the present invention. It is a side view which shows the working machine provided with the power supply control apparatus for vehicles same as the above. It is a flowchart which shows control of the power supply control apparatus for vehicles same as the above.

15 Work equipment
17 Machine body as a vehicle
31 Key switch
32 engine
33 Alternator as generator
34 battery
35 Controller as control means
36 Energy saving mode switch
38 Electrical components
39 Vehicle power supply controller

Claims (2)

A key switch capable of switching between stopping and starting the engine and electrical components mounted on the vehicle;
An energy saving mode switch for turning the energy saving mode on and off; and
When the engine and electrical components are started with the key switch, if the energy-saving mode is turned on with the energy-saving mode switch, only the power for starting the engine and the power for the predetermined electrical components specified in advance are supplied from the battery. After starting the operation of the generator that is driven by the engine start and charges the battery, the supply of power from a battery for a predetermined electrical component other than the predetermined electrical component that is specified in advance is started to save energy. When the energy saving mode is turned off by the mode switch, a control means is provided for supplying a power source for starting the engine and a power source for predetermined electrical components and electrical components other than the predetermined electrical components from the battery. A power supply control device for a vehicle characterized by the above. A vehicle,
A working device operably provided in the vehicle;
An engine mounted on the vehicle,
With electrical components,
A battery for supplying a power source for starting the engine and a power source for electrical components;
A generator driven by the engine to charge the battery;
A work machine comprising the vehicle power supply control device according to claim 1 .

Images