JPH0312652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a governor device for a vertical shaft internal combustion engine.

[Prior art] Conventionally, the conditions for application as an internal combustion engine for an outboard motor are:
Being lightweight and compact is an absolute requirement, and the internal combustion engine for outboard motors is built into the lower cowling and atsupa cowling, making maintenance and inspection easy by simply removing the atsupa cowling. This is also a necessary condition.

On the other hand, due to the remarkable rise in the price of gasoline fuel in recent years, diesel engines are being adopted as internal combustion engines for outboard motors.

Conventionally, when a diesel engine is used as an internal combustion engine for an outboard motor, a mechanical governor device (for example, a floating lever governor device) has the disadvantage of requiring a complicated mechanism when reliably controlling the fuel injection. It was hot.

[Problem to be solved by the invention]

The present invention incorporates a mechanical governor device that is compact and performs reliable control into a diesel engine,
The purpose of this invention is to facilitate not only its assembly but also its maintenance and inspection.

[Means to solve the problem]

In a vertical shaft type internal combustion engine having a governor device and in which a plurality of horizontally oriented cylinders are arranged vertically in parallel and a crankshaft is arranged in a vertical direction, a concave governor chamber is provided at the top of the cylinder block, Two openings are formed in the governor chamber, and a lid member is removably attached to each opening, and one lid member is driven by a timing belt disposed at the top of the cylinder block. Attach a governor device having a rotating member, a governor weight that is attached to the rotating member and opens and closes by centrifugal force, and a governor spindle that converts the opening and closing of the governor weight into axial displacement on the center of the rotating shaft, and then close the other lid. The members include an output member that inputs the displacement of the governor spindle of the governor device and provides displacement to the injection amount increase/decrease member of the fuel injection device, and a regulator handle that allows the output displacement of the output member to be changed from the outside. A governor device for a vertical shaft internal combustion engine is provided with a regulator handle device having a regulator handle device.

〔Example〕

The schematic side view of FIG. 1 shows an outboard motor consisting of a diesel engine 2 and a drive unit 3 mounted on the stern 1 of a small boat in this embodiment.
The diesel engine 2, which is an internal combustion engine for the outboard motor, rotates a propeller screw 4 provided at the bottom of the drive unit 3, propelling the small boat in the traveling direction of arrow A, and moving forward of the outboard motor. The ship is operated by moving a steering handle 5 that protrudes from side to side on the ship.

Next, FIG. 2 shows an enlarged side sectional view of the inside of the diesel engine 2 shown in FIG. The propeller screw 4 is rotated via the drive unit 3 by rotating the crankshaft 11 provided in the vertical direction.

Normally, in the overhead cam type diesel engine 2 as described above, the camshaft 12 can be positioned directly above the cylinder center, but in the present invention, the overall length of the engine is shortened as an internal combustion engine 2 for an outboard motor. The camshaft 12 is located as low as possible in the cylinder head 7, and the unit injector 9, which is inclined toward the side where the camshaft 12 is provided, is operated via a swing arm.

Further, each unit injector 9 of the diesel engine 2 is provided with a lever for controlling the fuel injection amount, which is fixed to a plunger (not shown), and these levers are connected to arrows D parallel to the crankshaft 11, It is rotated by a fork 42 shown in FIG. 3 fixed to the control rod 16, which is an injection amount increasing/decreasing member that moves up and down in the E direction, and moves in the direction of the arrow E.
The fuel injection amount is increased by arrow D and the fuel injection amount is decreased by arrow D.

Next, in the upper part of this diesel engine 2, a governor pulley is rotated by this crankshaft 11 via a timing belt 17 shown in FIG. 18
is rotatably supported by a bearing 19, and a governor shaft 23 rotates together with the governor pulley 18.
A mechanical governor device (for example, a floating lever type governor device) is provided at the bottom of the governor weight 44, a governor spring 41, and a governor spindle 45 that is slidable up and down.

When the governor device operates as the diesel engine 2 rotates and the governor weight 44 opens, the governor spindle 45 moves downward, and the floating lever 46, which is an output member that rotates about the shaft 47, moves downward. The control is provided on the cylinder head 7 on the left side of FIG. 3 via a link member 48 rotatably connected to one end of the floating lever 46, and rotates around a shaft 40. Through the lever 49, the vertical movement of the governor spindle 45 can be changed in the direction D of decreasing the fuel injection amount of the control rod 16.

In FIG. 2, the diesel engine 2 is surrounded by a lower cowling 28 and an atsupa cowling 29. The lower cowling 28 is fixed to the outboard motor body, but the atsupa cowling 29 is It can be easily removed by turning the handle 27, and maintenance and inspection can be performed from above in the removed state.

In the floating lever type governor device having the above configuration, the spring force of the governor spring 41 supported by the spring presser 21 integrated with the governor housing 22 and the centrifugal force of the governor weight 44 act as internal forces. The amount of movement of the governor spindle 45 increases or decreases in proportion to the number of rotations of the diesel engine 2, and by simply adjusting the gap H between the governor spring 41 and the spring retainer 21 in FIG. The assembly of the pre-assembled governor device is completed, and such a governor device assembly can be easily installed on the top surface of the cylinder block 6 of this diesel engine 2.

Next, the shaft 47 supporting the floating lever 46 is attached to the regulator lever 31 as shown in FIG. 4, which is a plan sectional view in the - direction of FIG.
The regulator lever 31 is rotatably attached to the regulator lever shaft 30, and the regulator handle 26 is attached to the regulator lever shaft 30.

The regulator lever 31 has a pin 32.
is attached, and the regulator lever shaft 30
A pin 33 is also attached to the pin 33, and a torsion spring 34 is provided between these pins.
The regulator handle 26 acts as a return spring to return the regulator handle 26 in the direction of deceleration.

Therefore, by the action of this torsion spring 34, the pins 32 and 33 are brought into close contact with each other at point P in FIG. , is attached in advance to the lid member of the regulator handle base 25 shown in FIG. 4, and attached to the upper side of the cylinder block 6 as an assembly.

Furthermore, the regulator handle 26 is connected to the steering handle 5 located on the stern 1 side shown in FIG. By rotating the regulator handle 26 as shown in FIG.
Or it's starting to slow down.

Therefore, if the governor device of the present invention is adopted, there is an advantage that the governor device and the regulator handle device, which have complicated structures, can be preset in their respective lid members and then assembled as an assembly onto the upper part of the cylinder block. This has the advantage that the number of assembly steps can be reduced, and the adjustment can be performed easily and accurately.

Furthermore, since the governor device of the present invention is located on the top surface of the engine, when used as an internal combustion engine for an outboard motor, simply removing the atsupaka cowling of the outboard motor will allow the engine to flow as described above. Maintenance and inspection of the steering lever type governor device can be easily performed, and operability is also improved.

Furthermore, since the governor device of the present invention is compactly formed by being incorporated into a cylinder block, it can be particularly effectively applied to internal combustion engines for outboard motors.

[Brief explanation of the drawing]

1 is a schematic side view of the main part of the stern of a small boat equipped with an outboard motor according to an embodiment of the present invention; FIG. 2 is an enlarged side sectional view of the main part showing the inside of the diesel engine shown in FIG. 1; 3 is an enlarged side sectional view of the main parts of the floating lever type governor device seen from the back side of FIG. 2, and FIG. 4 is a plan sectional view of the main parts in the - direction of FIG. 3. 2... Diesel engine, 6... Cylinder block, 12... Camshaft, 17... Timing belt, 20... Lid member, 25... Regulator handle base, 26... Regulator handle, 41
...Governor spring, 44...Governor weight, 45...Governor spindle, 46...Floating lever.

Claims (1)

[Claims] 1. In a vertical shaft type internal combustion engine having a governor device and having a plurality of horizontally oriented cylinders arranged vertically in parallel and a crankshaft arranged vertically, a concave governor chamber is provided at the top of the cylinder block. Two openings are formed in the governor chamber, and a lid member is removably attached to each opening, and one lid member is driven by a timing belt disposed on the top side of the cylinder block. A governor device is installed, which has a rotating member, a governor weight attached to the rotating member that opens and closes by centrifugal force, and a governor spindle that converts the opening and closing of the governor weight into axial displacement on the center of the rotating shaft. The lid member includes an output member that receives the displacement of the governor spindle of the governor device as an input and provides displacement to the injection amount adjustment member of the fuel injection device, and a regulator that allows the output displacement of the output member to be changed from the outside. A governor device for a vertical shaft internal combustion engine, which is equipped with a regulator handle device having a handle.