JPH0118219Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine control device for a chemical spray vehicle that sprays chemical solutions using a chemical spray fan connected to a fan drive output shaft of a diesel engine.

The object of the present invention is to provide an engine control device with a simple structure suitable for smoothly starting a chemical spray fan when a chemical spray switch is turned on during high-speed engine operation.

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows the basic configuration of a chemical spraying vehicle, in which the output of a diesel engine 1 is transmitted via a main clutch 2, an intermediate transmission 3 to drive wheels 4, 4, and a chemical spraying fan 5. Reference numeral 6 represents a traveling mission, and reference numeral 7 represents an electromagnetic clutch that connects the fan drive output shaft 8 of the diesel engine 1 and the chemical liquid spraying fan 5.

As is well known, the injection pump 9 of the diesel engine 1 includes a fly weight, a tension lever,
It has a governor consisting of a swivel lever, a control lever, a guide lever, an adjusting lever 10, etc., and is configured to control the position of the control rack to adjust the amount of fuel injection.

As shown in FIG. 2, the adjusting lever 10 is connected to a rotation control lever 14 via an extensible elastic connecting member 12 containing a compression spring 11 and a rod (which may be a wire) 13. Normally, the force of the compression spring 11 overcomes the external force, and the elastic connecting member 12 is in a contracted state, and both levers 10 and 14 are connected in an integral interlocking relationship, and the rotation control lever 14 is moved to the left in FIG. When the rotation control lever 14 is rotated to the high speed position shown in FIG. Along with this, the adjuster steering lever 10 also moves to the right and rotates to the low speed position. The adjuster steering lever 10 is always biased toward the low speed position, and as shown in FIG.
For example, 2500 rpm,
The engine speed positions are 1200rpm and 800rpm.

The adjuster steering lever 10 has a long hole 1.
5, the end engaging portion 17a of the operating rod 17 of the solenoid 16 is loosely engaged. As shown in FIG. 4, this solenoid 16 is energized and activated when the chemical spray start switch 18 is turned ON (shown as ON in FIG. 4), and then operates for a predetermined period of time (T ₁ +T ₂ ).
(for example, 4 to 10 seconds). FIG. 2 shows the solenoid 16 in its inoperative state, but when it is activated, the third
As shown in the figure, the operating rod 17 moves to the right to rotate the adjuster steering lever 10 from the high speed position shown by , to the low speed position shown by . At this time, since the rotation control lever 14 is restrained in its original position, the compression spring 11 of the elastic connecting member 12 is compressed by the tensile force caused by the rightward movement of the adjusting lever 10, and as a result, the elastic connecting member 12 is expanded. , allowing the adjuster steering lever 10 to rotate independently to the low speed position.

When the solenoid 16 stops operating and moves back to the left, the compression spring 11 is restored,
As a result of the elastic connecting member 12 being compressed to its original state, the adjusting lever 10 is rotated back to its original high speed position. The size and shape of the elongated hole 15 are determined so as to enable the solenoid 16 to perform the above-mentioned action and not to restrict the rotation of the adjuster steering lever 10 when the solenoid 16 is not in operation.

As shown in FIG. 4, the electromagnetic clutch 7 connecting the fan drive output shaft 8 and the chemical liquid spraying fan 5 operates for a predetermined time (T ₁ ) (for example, 3 to 7 seconds) from the time when the start switch 18 is turned on. After a certain period of time, it is energized and enters the connected state (shown as ON in FIG. 4). In other words, the solenoid 16
The electromagnetic clutch 7 is brought into the connected state at a proper time while the start switch 18 is in operation, and the electromagnetic clutch 7 is released (the fourth
Shown as OFF in the figure. ). The time (T ₂ ) from when the electromagnetic clutch 7 becomes connected to when the solenoid 16 switches to a non-operating state (shown as OFF in FIG. 4) should be 1 second or more. is desirable. Further, the time control can be performed by a well-known method using a relay circuit, a microcomputer, or the like.

Next, the operation of the above configuration will be explained.

While the diesel engine 1 is rotating at high speed (e.g.
2,500 rpm), when the start switch 18 is turned on, the solenoid 16 is activated and the adjuster steering lever 10 is rotated from the high speed position shown by to the low speed position shown by . At this time, the rotation control lever 14 is held at the original high speed position.

When the adjuster steering lever 10 moves to the low speed position indicated by , the fuel injection amount decreases,
The rotation speed of the engine 1 is set to a predetermined rotation speed (for example,
1200rpm).

Then, after a predetermined time (T ₁ ) (for example, 5 seconds) has elapsed, the electromagnetic clutch 7 is energized to connect the fan drive output shaft 8 and the chemical spraying fan 5. Therefore, the rotation of the engine 1 is transmitted to the chemical liquid spraying fan 5.

When this electromagnetic clutch 7 is in the connected state,
Since the rotational speed of the engine 1 is lowered to a predetermined rotational speed, the connection can be made smoothly.

After that, when a predetermined time (T ₂ ) (for example, 1 second) has elapsed, the solenoid 16 is switched to a non-operating state, and the adjuster steering lever 10 is rotated back to the high speed position shown by .
The number of revolutions increases, and the chemical liquid spraying fan 5 becomes able to spray the chemical liquid.

After an arbitrary period of time has passed, turn on the start switch 18.
When the OFF operation is performed, the electromagnetic clutch 7 is switched to the open state, the chemical solution spraying fan 5 is stopped, and the chemical solution spraying is completed.

As shown in the above embodiment, the present invention connects the chemical spraying fan 5 to the fan drive output shaft 8 of the diesel engine 1 via the clutch (electromagnetic clutch in the above embodiment) 7, and connects the chemical spray fan 5 to the fan drive output shaft 8 of the diesel engine 1. To the edge steering lever 10,
An actuator (a solenoid, an operating rod, and a long hole in the above embodiment) 1 that operates to rotate this lever 10 to a low speed position when it is in a high speed position, and does not restrict the rotation of the lever 10 when it is not activated.
6, 17, and 15 are loosely engaged, and the lever 10
The rotation control lever 14 is connected via a stretchable elastic connecting member 12 that extends in response to the tensile force only when the lever 10 rotates from a high speed position to a low speed position due to the actuation of the actuators 16, 17, and 15. and further the actuator 16,1
7, 15 is activated by the chemical liquid spraying start switch 18.
is set at a predetermined time ₍ T ₁ + T ₂ ) from the ON operation of
The starting point is at an appropriate time during the operation period of the actuators 16, 17, 15, and the chemical liquid spray starting switch 1 is activated.
It is characterized in that the engine control device of the chemical liquid spraying vehicle is configured with the end point at the time of OFF operation in step 8.
It goes without saying that the embodiments are not limited to those shown in the above embodiments.

The present invention has the above configuration and can control the engine as detailed in the operation description, so when the chemical spray start switch is turned on while the engine is running at high speed, the chemical spray fan can be started smoothly. A device suitable for this purpose can be provided.

Further, the present invention has a structure in which an actuator and an elastic connecting member are attached to the adjuster steering lever, and a simple operation time control circuit is disposed between the chemical liquid spray starting switch and the actuator and the clutch. Since the device can be configured, the complexity of the structure can be minimized, and the increase in manufacturing costs can also be kept low.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic diagram of its drive system, FIGS. 2 and 3 are side views of its engine control system, and FIG. 4 is an operating mode diagram. DESCRIPTION OF SYMBOLS 1... Diesel engine, 5... Chemical liquid spraying fan, 7... Clutch, 8... Fan drive output shaft, 9... Injection pump, 10... Asia steering lever, 12... Elastic connection member, 14... Rotation Control lever, 15, 16, 17... Actuator, 18... Chemical liquid spraying start switch.

Claims (1)

[Scope of utility model registration request] A chemical spraying fan is connected to the fan drive output shaft of the diesel engine via a clutch, and is actuated to rotate the gear steering lever of the injection pump of the diesel engine to the low speed position when this lever is in the high speed position. and an actuator that does not restrict rotation of the lever when not in operation is loosely engaged, and the lever receives a tensile force only when the lever rotates from a high speed position to a low speed position due to the operation of the actuator. A rotation control lever is connected via an extendable and retractable elastic connecting member, and furthermore, the operating period of the actuator is determined to be a predetermined time from the ON operation of the chemical spray start switch, and the period of the engaged state of the clutch is set to An engine control device for a chemical liquid spraying vehicle, characterized in that the starting point is at an appropriate time during the operation period, and the ending point is when a chemical liquid spraying start switch is turned OFF.