JP2001254625A - Self-supercharging principle of four-cycle engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a four-cycle engine having a new supercharger which is optimum for meeting the requirements such a small size, light weight, high output, cleanliness and easiness of handling toward an internal combustion engine. SOLUTION: When a straight engine is divided by the respective cylinders and V-engine (using a crankshaft where opposite pistons simultaneously come to the top dead center) of a horizontal opposed type is divided taking opposed cylinders as one set, and a crank case is fitted with an intake valve 1 and a discharge valve 2 in each cylinder, in the crank case on the back of the piston, the intake and discharge process is enabled for each one rotation of the crankshaft. The air is double the exhaust amount, and introduced into the combustion chamber to always enable about doubled supercharging. The intake/discharge valve can be fitted to a pipe connecting the crank case and the intake manifold.

Description

DETAILED DESCRIPTION OF THE INVENTION

Even if a crankcase portion (a space formed by an engine block and an oil pan) of a currently used engine is partitioned, airtightness cannot be ensured due to a space such as an oil passage timing chain and a timing gear.
Think of it as a cause. Review the entire engine to ensure airtightness. A 4-cycle engine refers to both gasoline and diesel. In the present invention, the terms used for the crankcase part use the intake and exhaust, and the terms used for the combustion chamber part use the intake and exhaust.

According to the present invention, when a suction valve discharge valve is attached to a crankcase in a four-cycle engine, suction and discharge can be performed at every degree by vertical movement of a piston for one rotation of a crankshaft, and this air is sent to a combustion chamber. And the intake volume was about twice as large as that of the displacement, and we focused on a self-charging high-power engine. In a two-stroke engine, air taken into a crankcase is sent into a combustion chamber from a scavenging port, but this is done in a short time and surely so that supercharging is not performed.

1. An in-line four-cylinder ignition sequence 1342 in which a crankcase portion is divided for each cylinder to secure airtightness.
When the first cylinder is in the compression stroke, air is drawn into the crankcase of the first and fourth cylinders, and when the fourth cylinder is in the suction stroke, the first and fourth cylinders are discharged from the crankcase. Two cylinders of air are supercharged into the combustion chamber of the fourth cylinder. In each of the intake strokes of the second and third cylinders, air for two cylinders is always supercharged from the crankcase of the second and third cylinders, and a high output is obtained. In the case of a V-type horizontally opposed engine in which a pair of cylinders facing each other and a crankcase is separated to ensure airtightness (a facing piston uses a crankshaft having a top dead center at the same time), a crank 1
With respect to the air that is always drawn into the crankcase for each rotation and discharged, the air for the two cylinders is supercharged in each of the left and right cylinders in one suction stroke per rotation, and a high output is obtained.

Conventionally, a turbocharged engine utilizing exhaust gas and a supercharger in which a pump is rotated by a belt from a crankshaft have been put to practical use, but each has advantages and disadvantages. The present invention makes it possible to always supercharge the intake air, which is about twice the displacement, by using the crankcase portion on the rear side of the piston, which has not been used in a four-stroke engine until now. Naturally, it is not affected by the rotational speed, regardless of the size of the displacement. If it is a 4-cycle engine, it can be used for gasoline and diesel engines, and the present invention can be used for motorcycles and huge vessels.

[0004]

In claim 2, the intake valve discharge valve is not attached directly to the crankcase portion of the engine block, but is attached externally. . The drive system is not written on the intake / exhaust valve in the drawing. Only the valve position necessary to explain the principle of self-charging has been entered. This is because the valve type and drive method will be determined according to the application when it is put into practical use.

[Brief description of the drawings]

Fig. 1 Schematic of a self-charging inline 4-cylinder engine

FIG. 2 is a sectional view of a self-charging V-type engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake valve 2 Exhaust valve 3 Intake valve 4 Exhaust valve 5 Intake manifold

Claims (2)

[Claims] An in-line engine includes a crankcase portion,
V-type with separated airtightness for each cylinder (opposite pistons use crankshafts that have top dead center at the same time)
In the horizontally opposed engine, a pair of cylinders facing each other are paired to separate a crankcase portion to ensure airtightness. The crankshaft 1 is attached to the crankcase of this airtight engine.
A suction valve and a discharge valve are attached to each cylinder so that the suction stroke and the discharge stroke are performed continuously by the vertical movement of the rotating piston. This air is then led to the intake manifold and sent to the combustion chamber. As a result, the crankshaft 1
With air sent out of the crankcase for each revolution, in the intake stroke of once every two revolutions, about twice the amount of exhaust air can be supercharged. 2. An in-line engine includes a crankcase portion,
V-type with separated airtightness for each cylinder (opposite pistons use crankshafts that have top dead center at the same time)
The horizontally opposed engine has a pair of cylinders that face each other and separates the crankcase to ensure airtightness. A pipe is attached to each cylinder in the crankcase of this airtight engine and connected to the intake manifold. And in the middle of the pipe, the piston moves up and down one revolution of the crankshaft,
Attach suction and discharge valves so that the suction and discharge strokes are performed continuously. This air is led to the intake manifold and sent to the combustion chamber. With this, the air sent out of the crankcase every one revolution is 2
In the intake stroke once per revolution, the air can be supercharged about twice as much as the displacement.