JPH0769291A - Navigation state automatic changeover device - Google Patents

Abstract

PURPOSE:To easily perform changeover between ordinary navigation and crawling navigation by providing a control device automatically changing to ordinary navigation rotating speed and crawling navigation rotating speed according to increase and decrease of engine speed due to an engine speed adjusting means by ON of a crawling speed-ordinary speed automatic changeover switch. CONSTITUTION:When an engine is started and a regulator handle is operated so as to rotate the engine at high speed through a governor, a fisher boat is moved to a fishing ground at high speed in 'ordinary navigation'. When the fisher boat reaches the fishing ground and the regulator handle is operated so as to decrease the engine speed, the engine speed is compared with the speed set by a crawling speed setting device 13, and a crawling speed-ordinary speed automatic changeover switch 26 is made ON when the engine speed becomes under the set speed. Hereby through a detection/command circuit 28 and then PWM control circuits 17, 18, a proportional solenoid valve 14 and an ON/OFF solenoid 15 are actuated, a hydraulic clutch is slipped so as to be in 'crawling navigation' state, and hence trawling fishery in crawling navigation is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic navigation state switching device for a marine engine equipped with a marine gear engine.

[0002]

2. Description of the Related Art For example, small fishing boats, recreational fishing boats, etc. are equipped with marine gear-equipped marine engines, and can be switched between normal (high-speed) navigation for reciprocating and moving to fishing grounds and slow-speed navigation for fishing. It is equipped with a manual operation switch to manually switch so that when "normal navigation" is set, the clutch operating clutch hydraulic pressure in the marine gear is increased to the specified maximum value to transmit the full torque of the engine to the propeller, Further, when the mode is set to "slow speed navigation", the clutch hydraulic pressure is lowered to a specified minimum value to allow the clutch to slip.

[0003]

However, in the above-mentioned conventional means, since the manual operation switch is used, it is necessary for the user of the fishing boat or the like to switch between "normal navigation" and "slow speed navigation" one by one. Not only is it very troublesome when it is frequently performed, but if the navigation speed can be selected in multiple stages, erroneous switching operations can lead to malfunctions and serious clutch damage.

Therefore, as in the automatic control device for a two-stage speed reduction clutch for a ship disclosed in Japanese Patent Laid-Open No. 2-51623,
Engine speed detection means, propeller speed detection means, engine speed adjustment means, deceleration clutch switching means, and engine speed reaches a specified speed during use in one speed reduction stage. In this case, there is also known a device which outputs a switching signal of the clutch switching means and a control means, but the device is complicated and expensive, and a failure is likely to occur. In view of the above, the present invention has a simple structure and high reliability,
The invention was devised for the purpose of providing an automatic navigation state switching device which is easy to operate and inexpensive.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, an automatic navigation state switching device of the present invention comprises an engine speed detector, a propeller speed detector, an engine speed adjusting means, and a clutch hydraulic pressure adjusting means. And a fine speed revolution setting device,
A slow speed-normal automatic switch, and a normal sailing rotation according to an increase or decrease in the engine speed by the engine speed adjusting means when the slow speed-normal automatic switch is turned on.
It is characterized by comprising a control device that outputs a clutch hydraulic pressure control signal so as to automatically switch to the slow speed set by the slow speed setting device.

[0006]

[Operation] With the navigation state automatic switching device of the present invention having the above-described structure, the engine is started and the engine key switch, which will be described later, which is the main switch is ON (step 1), and the engine is operated at high speed by operating the regulator handle. Then, move to a fishing ground, for example, by "normal navigation" (step 2). When arriving at the fishing ground, the regulator handle is operated to decelerate the engine (step 3), the engine speed is compared with the predetermined speed (step 4), and when the speed becomes lower than the predetermined speed, the slow speed / normal automatic switch is operated. ON
(Step 5), which causes the proportional solenoid valve and ON / OF to pass through the detection / command circuit and the PWM control circuit.
The F solenoid is actuated, and the hydraulic clutch is slipped to set to "slow speed navigation" (step 6). When the regulator handle is operated to increase the engine speed for moving to another fishing ground (step 7), the engine speed is compared with the predetermined speed (step 4), and this speed is set to the predetermined speed. When the number of revolutions is exceeded, the slow speed / normal automatic switch is turned off (step 8), which causes the proportional solenoid valve and the ON state via the detection / command circuit.
The operation instruction to the ON / OFF solenoid is released, the hydraulic clutch is securely contacted to make "normal navigation", and the process returns to step 2.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Explaining the embodiments shown in FIGS. 1 to 3, FIG. 1 shows an operation control device for a marine engine equipped with a marine gear equipped with an automatic navigation state switching device according to the present invention, which is installed in an engine room. The governor 4 for controlling the fuel system 3 of the marine engine 1 with 2 and the forward / reverse switching mechanism 5 of the marine gear 2 are connected to the regulator handle 6 and the forward / reverse switching handle 7 which are respectively installed in the cockpit by cables 8 and 9. Has been done. Reference numeral 10 denotes a control device provided in the engine room, which includes an engine rotation pulse signal from an engine rotation speed sensor 11, a propeller rotation pulse signal from a propeller rotation speed sensor 12, and a clutch front / rear from a clutch forward / rearward movement position sensor (not shown). The forward position and the slip (slow speed) operation electric signal set by the fine speed rotation speed setting device 13 are respectively input, and the proportional electromagnetic provided in the marine gear 2 is based on the fine speed rotation speed set by the rotation setting device 13. The clutch hydraulic pressure is controlled via the valve 14 to perform a predetermined slip (slow speed) operation. Although the manual operation switch for switching between the normal (high speed) navigation and the slow speed navigation is not shown, it is provided in the cockpit integrally with or separately from the rotation setting device 13, and it is manually turned on when necessary. However, in the present invention, it is provided in the rotation setting device 13 and the control device 10. .

That is, FIG. 2 is a circuit diagram of the control device 10, in which the rotation setting device 13 is a P.I. I. It is connected to the D control circuit 16, and is directly connected to the proportional solenoid valve 14 through one circuit 17 of the PWM control circuits 17 and 18. The propeller rotation speed sensor 12 is connected to the P.P.P. through the waveform shaping circuit 19 and the F / V circuit 20. I. It is connected to the D control circuit 16. The engine speed sensor 1
1 is connected to the Ne detection circuit 21 and is connected to each of the comparators 22, 2
3 and is connected to each of the PWM control circuits 17 and 18. The PWM control circuit 18 uses the PW
The power supply circuit 24 is connected to the M control circuit 17 and the ON / OFF solenoid 15 of the marine gear 2, and 24 is an electric power circuit having an engine key switch 25. Reference numeral 26 denotes a fine speed-normal automatic changeover switch which is turned on at a predetermined rotation speed of the engine 1 or lower, for example, a rotation speed slightly higher than the idling speed), and 27 is a cancel switch for canceling the action of the slow speed-normal automatic changeover switch 26 Both are connected to the detection / command circuit 28, and the circuit 28 is interposed between the comparator 23 and the PWM control circuit 18.

The operation of the automatic navigation state switching device of the present invention having the above-described structure will be described with reference to FIG. 3. First, the engine is started and the engine key switch 2 which is the main switch.
When 5 is ON (step 1), the regulator handle 6 is operated to increase the speed of the engine, and the vehicle moves to, for example, a fishing ground in "normal navigation" (step 2). When the vehicle arrives at the fishing ground, the regulator handle 6 is operated to decelerate the engine (step 3), and the engine speed is compared with the predetermined speed (step 4). 26 is turned on (step 5), which causes PWM through the detection / command circuit 28.
The proportional solenoid valve 14 and ON via the control circuits 17 and 18.
The / OFF solenoid 15 is operated and the hydraulic clutch is slipped to set to "slow cruising", which enables trolling fishing depending on the slow cruising (step 6). When the regulator handle 6 is operated to increase the engine speed for moving to another fishing ground (step 7), the engine speed is compared with the predetermined speed (step 4), and this speed is set to the predetermined speed. When the number of rotations exceeds
The slow-speed / normal automatic changeover switch 26 is turned off (step 8), which causes the proportional solenoid valve 14 and the ON / OFF solenoid 15 via the detection / command circuit 28.
The operation instruction to is released, the hydraulic clutch is surely contacted, and "normal sailing" is performed, and the process returns to step 2.

[0010]

According to the automatic navigation state switching device of the present invention, an engine speed detector, a propeller speed detector, an engine speed adjusting means, a clutch hydraulic pressure adjusting means, a fine speed revolution setting device, and a fine speed- Normal automatic changeover switch,
When the normal automatic changeover switch is turned on, the clutch hydraulic pressure is automatically switched between the normal navigation speed and the fine speed rotation set by the fine speed rotation speed setting device according to the increase or decrease of the engine speed by the engine speed adjustment means. Since it is characterized by a control device that outputs a control signal, it is not necessary for the user of a fishing boat to switch between "normal sailing" and "slow speed sailing" one by one, and even when frequently moving the fishing ground, etc. Not only is it trouble-free, but there is also no risk of malfunctions or serious clutch damage due to incorrect manual switching operations. Further, according to the present invention, there is also an effect to provide an automatic navigation state switching device having a simple structure, high reliability, and low cost.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an operation control device for a marine engine equipped with a marine gear, which is equipped with an automatic navigation state switching device according to the present invention.

FIG. 2 is a circuit diagram showing an electrical connection state between a control device, each sensor, a rotation speed setting device, and a proportional solenoid valve.

FIG. 3 is a flow chart showing the operation of the automatic navigation state switching device of the present invention 1; engine 2; marine gear 3; fuel device 4; control governor 5; forward / reverse switching mechanism 6; regulator handle 7; forward / reverse switching handle 8, 9 Cable 10; control device 11; engine speed sensor 12; propeller speed sensor 13; slow speed speed setter 14; proportional solenoid valve 15; ON / OFF solenoid 16; PID control circuit 17, 18; PWM Control circuit 19; waveform shaping circuit 20; F / V circuit 21; Ne detection circuit 22, 23; comparator 24; power supply circuit 25; engine key switch 26; slow speed / normal automatic changeover switch 27; cancel switch 28; Detection / command circuit.

Claims (1)

[Claims] 1. An engine speed detector, a propeller speed detector, an engine speed adjusting means, a clutch hydraulic pressure adjusting means, a fine speed revolution setting device, a fine speed-normal automatic switch, and the fine speed- When the normal automatic changeover switch is turned on, the clutch hydraulic pressure is automatically switched between the normal navigation speed and the fine speed rotation set by the fine speed rotation speed setting device according to the increase or decrease of the engine speed by the engine speed adjustment means. An automatic navigation state switching device comprising a control device that outputs a control signal.