JPH0370697A - Speed control device for plurality of marine engines - Google Patents

Abstract

PURPOSE:To substantially improve turning performance of a ship by detecting its turning angle and determining a control quantity so as to selectively adjust a speed of any of a plurality of engines in accordance with a detection result of the turning angle. CONSTITUTION:In the case of a small ship in which driving gears 6, 7, turnably provided about a vertical shaft in an external part of the stern, are interlocking- connected through drive shafts 4, 5 to the first and second engines 2, 3 mounted in a ship body l, turning action is performed by turning each driving gear 6, 7 to right and left through a steering lever or the like by controlling a control handle. Here by mounting an angle sensor 60 for detecting a steering angle alphaof the driving gears 6, 7, a detection signal of the sensor 6c is input to a control circuit 40. In the control circuit 40, a control, such as decreasing an opening of an air control valve in the engine 2 or 3 in a turn inner side in accordance with the detected turn angle, is performed, and turning performance is improved by decreasing propulsion force by the engine in the turn inner side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotation speed control device for a plurality of engines mounted on a ship.

(Prior Art) Conventionally, a ship equipped with a plurality of engines is turned by simultaneously rotating a plurality of drive devices left and right using a steering rod linked to an operating handle.

That is, conventionally, the turning operation of a ship was performed only by operating the rudder, and the turning operation was not performed by controlling the left and right engines.

(Problem to be Solved by the Invention) In such a conventional ship, the rotational speed of the plurality of engines is kept almost constant when turning, so the driving force of each engine is maintained equally on the left and right sides. There is a problem in that the propulsion force of the ship acts equally on the inside and outside of the turning direction, resulting in poor turning performance.

The problem to be solved by the present invention is to improve the turning performance of a ship by making the engine rotation speed on the inner side in the turning direction of the ship relatively smaller than the engine rotation speed on the outside in the turning direction when the ship turns.

(Means for Solving the Problems) For this purpose, the engine rotation speed control device for multiple engines for ships according to the present invention is an engine rotation speed control device for a ship equipped with a plurality of engines. a detection means, a control means for determining a control amount to selectively increase or decrease the rotation speed of one of the engines according to the detected turning angle detected by the turning angle detection means; The present invention is characterized by comprising a drive means for adjusting the rotation speed of a specific engine based on a control amount signal.

(Function) According to the rotation speed control device for multiple marine engines of the present invention, the turning angle of the ship, for example, the turning angle with respect to the hull of the drive device mounted on the ship is detected, and the turning angle of the plurality of engines is detected according to this turning angle. The turning performance of the ship is improved by controlling the rotation speeds between the engines and reducing the propulsive force of the engines on the inner side of the turning direction relative to the propulsive force of the engines on the outer side of the turning direction.

(Example) Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 2(A) and 2(B), a first engine 2 and a second engine 3 are mounted inside the hull 1 of an inboard/outboard engine of a small boat, and these engines are installed outside the stern. 1 engine 2
, and the second engine 3 via drive shafts 4.5, respectively, are rotatably mounted.

The first engine 2 and the second engine 3, as shown in FIG. The intake pipes are each connected to an intake manifold 14.15, to which a fuel injection valve 16.17 is respectively attached. Combustion chambers 22.23 are formed in the upper portions of the pistons 20 and 21 that reciprocally slide in contact with the engine cylinders 18 and 19, and these combustion chambers 22.23 are connected to exhaust pipes 24 and 25, respectively. .

Distributor 2 that sends a high voltage signal to spark plugs 26 and 27 at predetermined ignition timing according to the engine crank angle
8.29 is equipped with a rotation speed sensor 30.31,
The rotational position signal detected by the zero rotational speed sensor 30.31, which detects the rotational position of each engine by the rotational speed sensor 30.31, is input to the control circuit 40.

Bypass intake passages 32.33 that bypass the throttle valve 12.13 of the intake pipe 10.11 are configured to adjust the amount of intake air supplied from these bypass intake passages 32.33 to the downstream side of the throttle valve 12.13. Air control valve 3
4.35 is provided. These air control valves 34.
Reference numeral 35 denotes an am valve whose opening degree is determined by the duty ratio, and whose opening degree is adjusted by a drive amount signal from the control circuit 40.

The drive devices 6.7 attached to the stern of the hull 1 are a first engine (right engine) 2 and a second engine (right side engine), respectively.
It receives driving power from the left engine (engine) 3. In FIG. 1, only the drive device 6 to which the driving force of the first engine 2 is transmitted is illustrated, and the drive device 7
The structure of is similar to that of the drive device 6, so its explanation will be omitted.

The drive device 6 is connected from a drive shaft 4 connected to the crankshaft of the first engine 2 to a reduction gear 50 via a universal joint 44, a clutch 46, and a vertical shaft 48. The driving force from the reduction gear 50 is transmitted to the screw 54 via the propeller shaft 52.

A wire (not shown) interlocked with the steering handle of the hull l is connected to a steering lever 58, and the drive device 6 is rotated left and right in response to rotation of the steering lever 58. A drive device 6 is located near the steering lever 58.
An angle sensor 60 is attached to detect the cutting angle α. Turning angle α of the drive device 6 detected by the angle sensor 60
The detection signal is input to the control circuit 40. Note that the drive device 6 can be flipped upward by removing the hook 64 from the tilt pin 62.

Next, a control routine for the engine air control valve when the ship is turning will be described.

As shown in FIG. 3, first, in step 101, the angle sensor 60 detects the turning angle α of the drive device 6 or 7 shown in FIG.
It is determined whether α1 is larger than a predetermined value A. 1α1≦
If it is determined to be A, this routine ends and returns. This is to prevent hunting, which will occur if it is determined that the vehicle is turning when the turning angle α is a very small value. If it is determined that 1αl>A, the process proceeds to step 103 and it is determined whether or not it is a left turn. If it is determined that it is a left turn, the process proceeds to step 104 and the air control valve of the left engine is adjusted according to the value of the turning angle α. Reduce the opening degree of 35. In this case, the opening degree of the air control valve 35 is set so that the duty ratio corresponding to the turning angle α is determined as shown in FIG.
The amount of drive is determined. If it is determined in step 103 that the vehicle is turning to the right, the process proceeds to step 105 and the opening degree of the air control valve 34 of the right engine is reduced in accordance with the turning angle α. Regarding the opening degree of the air control valve 34 in this case, the amount of drive of the air control valve 34 of the right engine is determined based on the graph shown in FIG.

In this way, the opening degree of the air control valve is adjusted according to the turning angle α depending on whether the vehicle is turning left or turning right.

Therefore, for example, when it is determined that the turning is to the left, the larger the turning angle α is, the smaller the opening degree of the air control valve 35 of the left engine is, the intake air amount is reduced, and the propulsive force by the left engine 3 is reduced. This improves the ability of the hull to turn left. When it is determined that the vehicle is turning to the right, the ability to turn to the right is improved.

In the embodiment described above, the opening degree of the air control valve of the engine on the inside of the turning direction is controlled to be small depending on the turning direction, but in another embodiment of the present invention, the opening of the air control valve of the engine on the outside of the turning direction is The opening degree of the control valve may be increased. Furthermore, in the above embodiment, the amount of intake air is adjusted by controlling the drive amount of the air control valve provided in the bypass intake passage that bypasses the throttle valve, but in the present invention, the drive amount of the throttle valve itself as the air control valve is adjusted. It is also possible to control

In addition to the rotational speed control using the air control valve, the present invention also provides fuel injection amount control, for example, by adjusting the fuel injection amount of the engine on the inner side of the turning direction, cutting the fuel of the engine on the inner side of the turning direction, and controlling the fuel injection amount of the engine on the inner side of the turning direction. It is also possible to adopt a method of switching to reduced-cylinder operation, a method of retarding the ignition timing of the engine on the inner side in the turning direction, etc. as ignition advance control. Further, in the embodiment, the case of a gasoline engine has been described, but it is also applicable to a case of a diesel engine. The types of ships include inboard and outboard motors,
The present invention can also be applied to inboard motors and outboard motors.

(Effects of the Invention) As explained above, according to the rotation speed control device for a plurality of marine engines of the present invention, the turning angle detecting means for detecting the turning angle of the ship, and the detected turning angle detected by the turning angle detecting means control means for determining a control amount to selectively increase or decrease the rotational speed of one of the engines according to the control means; or a driving means that selectively drives either the ignition advance device or the ignition advance device, the turning performance of the ship can be greatly improved by combining operation using the rudder and engine speed control when the ship is turning. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment to which the present invention is applied;
FIG. 2(A) is a schematic side view of a ship to which an embodiment of the present invention is applied, FIG. 2(B) is a schematic plan view of the structure,
FIG. 3 is a flowchart showing a control routine for the air control valve in the embodiment of the present invention, and FIG. 4 is a graph showing the relationship between the turning angle of the drive device and the opening degree of the air control valve of the present invention. 4 5 ... Hull, ... First engine, ... Second engine, ... Air control valve (driving means), ... Air control valve (driving means), 40 ... Control (Sum circuit (control means) 0...Angle sensor (turning angle detection means)

Claims (1)

[Claims] (1) In an engine speed control device for a ship equipped with multiple engines, there is a turning angle detection means for detecting the turning angle of the ship, and a turning angle detection means for detecting the turning angle of one of the engines according to the detected turning angle detected by the turning angle detection means. A control means for determining a control amount to selectively increase or decrease the rotation speed, and a drive means for adjusting the rotation speed of a specific engine based on a control amount signal from the control means. A rotation speed control device for multiple marine engines.