JP2000064850A - Eccentric circular rotary diesel engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lengthen an explosion exhaust stroke so as to improve combustion efficiency by combining an outer cylinder and an inner cylinder eccentrically, and providing fixed partition walls in the suitable places of the outer cylinder while providing movable rotating vanes in the suitable places of the inner cylinder to partition intake and exhaust chambers a compression chamber and an expansion chamber. SOLUTION: An inner cylinder and an outer cylinder are eccentrically combined, and a compression chamber 7 and an exhaust chamber 9 partitioned by fixed partition walls 1, 2 are partitioned between both cylinders. An intake chamber and an explosion expansion chamber 8 can be partitioned by movable rotating vanes 3, 4 provided in two positions opposed in the radial direction of the inner cylinder. A compressed air sub-chamber 5 is provided at the fixed partition wall 1 part of the outer cylinder. When the movable rotating vane 4 advances to about three-quarters of an explosion exhaust stroke and an intake compression stroke, a push-out valve 11 is closed, and an inlet valve 10 is opened to push compressed air into the sub-chamber 5. When fuel is injected to this compressed air to burn the push-out valve 11 is opened to expand, thus supplying power to the inner cylinder.

Description

Detailed Description of the Invention

The present invention is based on the previous "Patent Application No. 110025".
No. ”was designed for the purpose of improving the efficiency of a true circle rotary engine.

One of the drawbacks of a perfect circle rotary engine is
The movable rotor blade is easily broken. When the outer cylinder and the inner cylinder of the engine are coaxial, the bending force (explosive pressure in the rotation direction and compression pressure in the opposite direction) that the movable rotor receives is applied to one point of the movable rotor. It is likely to break. Therefore, the center of the circle of the outer cylinder and the inner cylinder

By shifting (eccentricity) as shown in FIG. 1, the bending force applied to the movable rotor can be dispersed, and the movable rotor is less likely to break. Also, by doing so, the explosive pressure received by the movable rotor will be received by a small area of the movable rotor when the pressure is strong, and by a large area as the explosion pressure becomes smaller, the bending force will also decrease and the torque fluctuation There is also the effect of becoming smaller. In this way, the true circular rotary engine with the center of the outer circle and the center of the inner circle shifted is named the eccentric rotary engine.

[Figure 1]

[Fig. 2]

[Fig. 3] is a member of the eccentric rotary engine.

[0003]

[Figure 1]

[Fig. 2]

In both engines of [Fig. 3], the fixed partition β is shifted about 20 degrees from the symmetrical position of the fixed partition α toward the intake / compression chamber. As a result, the intake and compression strokes will be short, and the explosion and exhaust strokes will be long, improving combustion efficiency. However,

The engine of [Fig.1] has a small intake air volume, so I think it is desirable to use a turbocharger such as a Lisholm compressor.

[0004]

The engine in [Fig. 2] is designed to secure intake air without using a supercharger. Expand the outer cylinder of the intake / compression chamber to form an eccentric circle. I think it is more advantageous in terms of friction than using a supercharger. I decided to call this engine a circular rotary engine.

[0005]

The engine shown in Fig. 3 uses the compressed air sub chamber as the sub chamber of the explosion chamber. When the movable bulkhead advances about 3/4 of the explosive exhaust stroke / intake compression stroke (marked with a dotted line), the extruding valve of the compressed air subchamber 11 is closed while leaving the combustion gas, 1
Open the suction valve of the compressed air subchamber 0 and push the compressed air into the subchamber. When the movable bulkhead touches the 10th valve, the 10th valve is closed, and when the movable bulkhead passes the 11th valve, fuel is injected into the sub chamber to cause combustion and simultaneously the 11th valve is opened.
When fuel is injected into the sub-chamber, the heat of the combustion gas residual air remaining in the sub-chamber and the temperature of the compressed air due to adiabatic compression cause spontaneous ignition. The fuel is assumed to be light oil, but methanol or LPG may be used as long as it can be spontaneously ignited.

The engine of [Fig.3] is called an eccentric rotary diesel engine.

The operation of an eccentric rotary diesel engine is that "air is compressed by a rotor, fuel is injected into the compressed air, and the rotor is rotated by combustion gas." By the way, this description is exactly the same as the description of the gas turbine engine. The drawback of the perfect circle rotary engine group and the difficulty of realizing it are the difficulty of sealing. The idea from the beginning was to use a material with very little thermal expansion and a structure with no gaps. There is a gap, and 1 if you seal
Four seals are required. 10 places even if devised. Sealing is difficult anyway, but if you think that this engine is a small, low-speed rotation type gas turbine engine, I think that it will be an efficient engine even if there is a small gap.

Now that hybrid engines, electric vehicles, fuel cells, etc. are becoming a reality, it is often thought that improving the efficiency of internal combustion engines is not a problem, but I think that is not the case. Efficient generator engine
We believe that the need for small, highly efficient engines, such as small and medium-sized marine engines, will continue to grow. In particular, if a medium-sized ship engine can be used as the engine of the invention, a ship with minimal vibration can be created.

[Brief description of drawings]

Figure 1: Structure of eccentric rotary engine

[Fig. 2] Structure of an elliptic rotary engine

[Fig. 3] Structure of an eccentric rotary diesel engine

[Explanation of symbols]

"1 fixed bulkhead α""2 fixed bulkhead β"
"3 movable rotor A""4 movable rotor B""5 compressed air sub-chamber"
"6 Air intake chamber""7 Compression chamber""8 Explosion expansion chamber""9
Exhaust chamber "10 Suction valve for compressed air subchamber""11 Extrusion valve for compressed air subchamber""12 Intake pipe""13 Intake chamber opening"
"14 exhaust chamber opening""15 exhaust pipe""16 fuel injection pump"
"17 spark plug,""O _within the cylindrical center""O _{outside the} outside cylindrical center"

Claims (2)

[Claims] 1. Structure of an elliptic rotary engine [Fig. 2] 2. A structure of an oblate rotary diesel engine. [Figure 3]