JPH09264166A - Electronic governor of electronic fuel injection device for specially equipped vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of the switching operation of a manual changeover switch and to improve operability for operating equipment added to a specially equipped vehicle regarding the electronic fuel injection device of the specially equipped vehicle such as a concrete mixer vehicle or the like. SOLUTION: A specially equipped vehicle includes an axle sensor 8A connected to the input side of a control unit 11, an all speed sensor 9A connected to the input side of the control unit 11 and the driving room of a cab 2A connected to the input side of the control unit 11. The vehicle further includes a manual changeover switch for sending a selection signal for turning ON the axle sensor 8A or OFF the all speed sensor 9A or a selection signal for turning OFF the axle sensor 8A or ON the all speed sensor 9A to the control unit 11 and a seat load switch 21 provided side by side with the manual changeover switch 13 for detecting an occupant seating state as an OFF condition and an occupant non-seating state as an ON condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic governor for an electronic fuel injection device in a specially equipped vehicle such as a mixer-only vehicle.

[0002]

2. Description of the Related Art For example, as a fuel injection device for a diesel engine, one having a mechanical governor as shown in Japanese Utility Model Laid-Open No. 62-40239 is used, but in recent years, an electronic device has been used instead of the mechanical governor. Those with governors are used. Here, in the electronic fuel injection device, the electronic governor inputs a load signal from the accelerator sensor that senses the accelerator opening of the accelerator pedal as a change in voltage, a signal from the engine rotation sensor, etc. A load signal is sent to a governor section having a DC linear motor, and the governor section moves the control rack.

In a truck or the like which is driven by a diesel engine using such an electronic fuel injection device, when the power of the diesel engine is used for traveling, a cab for controlling the rotation of the diesel engine during traveling is used. It is sufficient to install only the accelerator sensor in the cab. However, in a specially equipped vehicle such as a mixer-only vehicle or a vehicle for construction machinery, the power of the diesel engine is used to drive the bodywork of the specially equipped vehicle during work, so that, for example, not only the accelerator sensor but also the accelerator opening degree of the operating lever is used. An all-speed sensor that senses as a voltage change is attached to the bodywork.

In a specially equipped vehicle such as a mixer-only vehicle equipped with a diesel engine having the above-mentioned electronic fuel injection device,
A manual changeover switch is required to switch between the accelerator sensor used during traveling and the all speed sensor used during work, and the manual changeover switch is connected to the control unit. According to FIG. 5 to FIG.
The electronic governor of the electronic fuel injection device in the mixer-only vehicle will be described.

5 and 6, reference numeral 1 is a mixer-only vehicle, and the mixer-only vehicle 1 is composed of a chassis body 2 and a mixer 3 mounted on the chassis body 2. A diesel engine 4 is mounted on the front of the chassis body 2. The diesel engine 4 includes an electronic fuel injection device 5, and the electronic fuel injection device 5 includes a fuel injection pump 6 and
It has an electronic governor 7 that controls the amount of movement of the control rack 6A of the fuel injection pump 6.

The electronic governor 7 has an accelerator sensor 8 for detecting the accelerator opening of the accelerator pedal 8 as a change in voltage.
A, an all-speed sensor 9A that senses the accelerator opening of the operating lever 9 for work as a change in voltage, an engine rotation sensor 10, and a control unit 11 to which an accelerator sensor 8A and an all-speed sensor 9A are connected on the input side. And DC for moving the control rack 6A of the fuel injection pump 6 by the control unit 11.
Governor 12 having a linear motor (not shown)
And a manual changeover switch 13, and the accelerator sensor 8
The load signal of A, the signal of the engine rotation sensor 10 and the like are input to the control unit 11, the load signal is sent from the control unit 11 to the governor section 12, and the governor section 12 controls the control rack 6 of the fuel injection pump 6.
A is moved and the fuel injection amount in the fuel injection pump 6 is increased or decreased.

The accelerator sensor 8A is the chassis body 2
Is provided on the accelerator pedal 8 arranged in the driver's cab 2B of the cab 2A, and the all-speed sensor 9A is provided on the operation lever 9 arranged at the rear of the mixer 3. A manual changeover switch 13 is connected to the input side of the control unit 11, and the manual changeover switch 13 is provided on an instrument panel (not shown) in the operator's cab 2B of the cab 2A.

By the switching operation of the manual selector switch 13,
As shown in FIG. 7, when the manual selector switch 13 is in the OFF state, the accelerator sensor 8A is connected to the control unit 11 and is in the ON state, and at the same time, the all speed sensor 9A is cut off from the control unit 11 and is in the OFF state. Is in the state, and the accelerator sensor 8A is running.
Is used.

On the other hand, when the manual changeover switch 13 is changed over, the manual changeover switch 13 is turned on as shown in FIG.
In this state, the accelerator sensor 8A is cut off by the control unit 11 and is in the OFF state, and at the same time, the all-speed sensor 9A is in the control unit 11
Is connected to the ON state, and the all-speed sensor 9A is used during work.

In the mixer-only vehicle 1, the mixer 3
Governor map when rotating the engine (the horizontal axis is the engine speed,
The control map shown by taking the injection amount on the vertical axis is the same when the mixer-only vehicle 1 is running and when it is working.

[0011]

However, when an occupant leaves the cab 2A of the cab 2A to go to the rear of the mixer-only vehicle 1 and operates the operating lever 9 to drive the mixer 3 of the mixer-only vehicle 1, The occupant goes to the rear side of the mixer-only vehicle 1 and operates the operation lever 9 to operate the all-speed sensor 9
It is necessary to transmit the load signal to the control unit 11 via A. In this case, if the occupant forgets to perform the switching operation of the manual changeover switch 13 in the traveling state (OFF state) shown in FIG. 7 (the manual changeover switch 13 remains in the state of FIG. 7 and is not in the state of FIG. 8). ), Accelerator sensor 8
Since A remains connected to the control unit 11 and the all-speed sensor 9A remains disconnected from the control unit 11, the occupant drives the diesel engine 4 to operate the mixer 3. No signal is transmitted from the all-speed sensor 9A to the control unit 11 even when trying to drive.

Therefore, the occupant is forced to return from the rear portion of the mixer-dedicated vehicle 1 to the driver's cab 2B of the cab 2A to switch the manual changeover switch 13 from the OFF state to the ON state, and drive the mixer 3 of the mixer-dedicated vehicle 1. The workability when operating was poor. The present invention has been made to solve the above-described problems, and an object thereof is to manually switch a vehicle when an occupant operates a vehicle body of a specially-equipped vehicle via an all speed sensor away from the cab cab. It is an object of the present invention to provide an electronic governor for an electronic fuel injection device in a specially-equipped vehicle that does not require the switching operation of No. 1 and can improve the workability when operating the bodywork of the specially-equipped vehicle.

[0013]

SUMMARY OF THE INVENTION The present invention provides an accelerator sensor connected to the input side of a control unit, which is provided in a cab cab and sends a load signal to a governor section for moving a control rack, and an cab of the cab. An all-speed sensor that is provided externally and is connected to the input side of the control unit, and an all-speed sensor that is connected to the input side of the control unit and is provided in the cabin of the cab and that turns the accelerator sensor ON O
Select signal to put in FF state or set accelerator sensor to O
A manual changeover switch that sends a selection signal to the control unit to set the FF state and the all speed sensor to the ON state is provided in parallel with the manual changeover switch to detect the seated state of the occupant as the OFF state and to detect the non-occupancy of the occupant. And a seat load switch for detecting the seated state as an ON state.

(Operation) In the present invention, the seat load switch is in the OFF state when the occupant is sitting on the seat in the cab cab and is not working (when the specially equipped vehicle is running or stopped). In this state, if the manual changeover switch is in the ON state, the all speed sensor is selected in the ON state.

On the other hand, when the occupant is operating away from the cabin of the cab through the all-speed sensor to drive the bodywork of the specially equipped vehicle (at work), the seat load switch is in the ON state. Therefore, regardless of whether the manual selector switch is OFF or ON, the accelerator sensor is OF
In the F state, the all speed sensor is in the ON state.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4, an electronic governor of an electronic fuel injection device in a specially equipped vehicle according to an embodiment of the present invention will be described. In the embodiment of the present invention, the same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. Further, a mixer-only vehicle will be described as an example of the specially equipped vehicle. 1 and 2, a seat load switch 21 is provided in parallel with the manual changeover switch 13. The seat load switch 21 is arranged on the seat 22 and detects the seated state of the occupant as an OFF state and the non-seated state of the occupant as an ON state according to the weight of the occupant. The seated state of the occupant is a binary signal. Detected as. That is, seat load switch 2
1 is OF when the passenger is sitting on the seat 22 in the cab 2B.
In the F state, it becomes the ON state when separated. Examples of the seat load switch 21 include a limit switch provided on the floor surface (not shown) of the cab 2A.

Therefore, in the embodiment of the present invention, as shown in FIG. 3, when the occupant is not sitting on the seat 22 of the cab 2A in the driver's cab 2B (when the mixer-only vehicle 1 is running or stopped). Further, the seat load switch 21 is automatically turned off. OF of the manual changeover switch 13
The ON state or the OFF state of the accelerator sensor 8A is selected according to the switching between the F state and the ON state. That is,
When the manual change-over switch 13 is operated, the seat load switch 21 does not affect the command to the control unit 11 by the manual change-over switch 13.

On the other hand, the occupant moves away from the cab 2A of the cab 2A and operates the operating lever 9 to operate the all speed sensor 9A.
When the mixer 3 of the mixer-only vehicle 1 is driven via the vehicle, the seat load switch 21 is automatically turned on as shown in FIG. Therefore, the OF of the manual selector switch 13
Accelerator sensor 8 regardless of the presence or absence of F state and ON state
A is in the OFF state, and the all speed sensor 9A is in the ON state. When the occupant operates the operation lever 9, a signal is transmitted from the all speed sensor 9A to the control unit 11 to drive the diesel engine 4,
The mixer 3 is operated.

According to the above-mentioned structure, the occupant moves away from the operator's cab 2B of the cab 2A and the all speed sensor 9A
When operating the mixer 3 of the mixer-only vehicle 1 via the, it is necessary to return to the driver's cab 2A of the cab 2A and switch the manual selector switch 13 even if the manual selector switch 13 is forgotten to be switched (even in the OFF state). In addition, the workability in driving the mixer 3 can be improved.

In the embodiment of the present invention, the seat load switch 21 is, for example, a limit switch. However, the seat load switch 21 is not limited to this and may be, for example, a pressure sensor. Further, in the embodiment of the present invention, the operation lever 9 and the all-speed sensor 9A are arranged at the rear part of the mixer 3, but the operator's cab 2B
It may be another part located outside of.

Further, in the embodiment of the present invention,
Although a mixer-only vehicle has been described as an example of a specially-equipped vehicle, the present invention is not limited to this, and a governor map of a diesel engine when driving the body of the specially-equipped vehicle (engine speed on the horizontal axis, injection on the vertical axis) It can be applied if the control map shown by taking the quantity is the same as when driving,
For example, a power generation vehicle equipped with a power generation device can be mentioned.

[0023]

According to the present invention, when an occupant separates from the cab cab and operates the bodywork of a specially-equipped vehicle through the all speed sensor, the cab cab may be forgotten even if the manual changeover switch is forgotten. It is not necessary to switch back to the manual changeover switch, and it is possible to improve the workability when operating the bodywork.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an electronic governor of an electronic fuel injection device in a specially equipped vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the seat load switch of FIG.

FIG. 3 is a diagram illustrating a usage state of the electronic governor when the mixer-only vehicle is not in operation.

FIG. 4 is an explanatory view of a usage state of the electronic governor during the operation of the mixer-only vehicle.

FIG. 5 is an explanatory diagram of an electronic governor of a conventional electronic fuel injection device for a mixer-only vehicle.

FIG. 6 is an external view showing a mixer-only vehicle.

FIG. 7 is a diagram illustrating a conventional usage state of the electronic governor when the mixer-only vehicle is not working.

FIG. 8 is an explanatory view of the usage state of the electronic governor during the operation of the conventional mixer-only vehicle.

[Explanation of symbols]

 1 Mixer-only vehicle (specially equipped vehicle) 2A Cab 2B Driver's cab 5 Electronic fuel injection device 6A Control rack 7 Electronic governor 8A Accelerator sensor 9A All speed sensor 11 Control unit 12 Governor part 13 Manual changeover switch 21 Seat load switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location F02D 11/02 F02D 11/02 C 29/00 29/00 B 41/04 380 41/04 380G

Claims (1)

[Claims] 1. An accelerator sensor provided in the cab cab and connected to an input side of a control unit for sending a load signal to a governor section for moving a control rack; and the control provided outside the cab. An all-speed sensor connected to the input side of the unit and a selection signal that is connected to the input side of the control unit and is provided in the cab of the cab to turn on the accelerator sensor and turn off the all-speed sensor, or , A manual changeover switch that sends a selection signal to the control unit to turn off the accelerator sensor and the all speed sensor to the control unit, and is provided in parallel with the manual changeover switch to detect the seated state of the occupant as the OFF state. And the non-seated state of the occupant is detected as the ON state. An electronic governor for an electronic fuel injection device in a specially equipped vehicle, comprising: a seat load switch.