JPS6018561Y2 - Starting device for internal combustion engines for motorcycles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a starting device for an internal combustion engine for a motorcycle, and more specifically, it includes a starter motor that rotates a crankshaft when a power switch is turned on, a generator that generates electricity by the rotation of the crankshaft, and a combustion engine. The present invention relates to an improvement in an internal combustion engine equipped with a pressure reducing device consisting of a communication path that communicates the inside of a room with the outside world, and a valve provided in the communication path.

Generally, as the displacement of an internal combustion engine increases, the torque required for the starter motor increases, which requires a high-output starter motor, as well as a large-capacity battery to drive the starter motor and a large generator to charge it. This increases the size of the starting device.

This increase in the size of the starter device poses a serious problem for motorcycles.

In other words, motorcycles have many devices installed in a limited space, so if the starting device becomes larger, it becomes extremely difficult to secure the installation space. This results in a problem of placing a large burden on the operator.

In order to eliminate the above-mentioned problems, the present invention reduces the engine compression pressure by automatically controlling the opening and closing of the valve of the pressure reducing device when starting the engine, thereby reducing the torque required for the starter motor, and reducing the size of the device. The purpose of the present invention is to provide a starting device that can be applied to large displacement engines while maintaining the same.

An example of the implementation of the present invention will be described with reference to the drawings. In the figure, 10 is a battery as a power source, E is the engine body, D is a pressure reducing device, M is a starter motor, and G is a generator for charging the battery 10.

The starter motor M is connected to the crankshaft 1 and rotates the crankshaft 1 when starting the engine.
is attached to the crankshaft 1 and generates electricity as the crankshaft 1 rotates.

The pressure reduction device is operated through a communication passage 3 that communicates the inside of the combustion chamber 5 with the outside world, and a valve 2 provided within this communication passage 3.

Further, the valve 2 is provided with an actuation lever 4, and by pulling this actuation lever 4, the valve 2 is opened.

The starting circuit connects the battery 10 and the starter motor M via a starter switch contact 12, and also includes a contact drive coil 1 that opens and closes the starter switch contact 12.
3 is connected to a battery 10 via a bundle switch 11 as a power switch to start and stop the starter motor M, and from the battery 10 via a bundle switch 11 to a solenoid 7 which is a valve opening/closing means of the pressure reducing device. It consists of a connecting circuit ■.

A relay contact 8 serving as means for stopping the operation of the solenoid 7 is inserted into the circuit H, and the relay contact 8 is opened by the operation of the relay coil 9.

The relay coil 9 is connected to the generator G, detects the electromotive voltage of the generator G, and operates to open the relay contact 8 when a voltage above a certain level is applied.

The operating lever 4 is connected to the solenoid 7, and when the solenoid 7 is energized, the operating lever 4 is pulled and the valve 2 is opened.

When the bundle switch 11 is turned on when starting the engine, the circuit I energizes the contact drive coil 13 and closes the starter switch contact 12, causing the starter motor M
starts and rotates the crankshaft 1.

At the same time, circuit (2) energizes solenoid 7 via relay contact 8, actuating lever 4 is pulled, and valve 2 is opened.

By opening the valve 2, the air-fuel mixture in the combustion chamber 5 is discharged from the combustion chamber 5 to the outside through the communication passage 3, and the compression pressure in the combustion chamber 5 is reduced.

Further, the generator G generates electricity by the rotation of the crankshaft 1,
When the battery 10 is charged and the relay coil 9 is energized, when the rotation of the crankshaft 1 reaches a rotation speed sufficient for starting the engine and a voltage corresponding to the rotation speed is applied to the relay coil 9, the relay coil 9 is energized. 9 is activated, relay contact 8
Open and cut off the circuit ■.

When the circuit (2) is cut off, the solenoid 7 automatically returns to its original state and the valve is closed.

At this time, the rotational speed of the engine is increasing, or the rotation can be sustained sufficiently by the inertia of the stopper wheel, so the required torque of the engine is small, and the rotational speed necessary for starting can be maintained.

As mentioned above, in this invention, the valve opening/closing means, Tsuremade, operates at the same time as the starter motor is activated to open the valve of the pressure reducing device, so the torque required to the starter motor of the engine is reduced, and the starter motor The burden is small.

In addition, when the crankshaft reaches a predetermined rotational speed, the electromotive force of the generator corresponding to the rotational speed is detected, and the stopping means consisting of a relay contact is activated, stopping the operation of the solenoid that is the valve opening/closing means. Since the engine was closed, there will be no problem in starting the engine thereafter.

Therefore, it is possible to start the engine with a small capacity battery and a low output small starter motor, and since the above-mentioned opening/closing means and stopping means are electrical, they are less likely to protrude outside the engine, and the starting device can be used. It is possible to reduce the size and weight and reduce the burden on motorcycles.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawing is a circuit diagram of the device of the present invention. In the figure, D: pressure reducing device, E: engine body, G: generator, M: starter motor, 1:・Crankshaft, 2...Valve, 3...Communication path, 7...Solenoid,
a...Relay contact, 9...Relay coil.

Claims (1)

[Scope of utility model registration request] A pressure reducing system that is equipped with a starter motor that rotates the crankshaft when a power switch is turned on, and a generator that generates electricity through the rotation of the crankshaft, as well as a communication path that communicates the inside of the combustion chamber with the outside world, and a valve installed in this communication path. In an internal combustion engine for a motorcycle equipped with a device, a valve opening/closing means comprising a solenoid that opens a valve of the pressure reducing device when the power switch is turned on, and a valve opening/closing means operated by an electromotive force of a certain level or more from the generator. A starting device for an internal combustion engine for a motorcycle, comprising a stopping means comprising a relay contact for stopping the operation of the pressure reducing device and closing the valve of the pressure reducing device.