Tangential internal combustion engine
The tangential internal combustion engine addresses mechanical dead points in conventional engines by using arc-shaped cylinders and freewheels to convert piston motion into torque, ensuring efficient and constant power delivery across varying speeds, thus improving fuel efficiency.
JP7893417B2Active Publication Date: 2026-07-22FNF INNOVATION SH P K
View PDF 4 Cites 0 Cited by
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- FNF INNOVATION SH P K
- Filing Date
- 2023-08-03
- Publication Date
- 2026-07-22
AI Technical Summary
Technical Problem
Conventional reciprocating piston engines suffer from mechanical dead points due to crank drives, leading to decreased force transmission as the engine approaches these points, limiting efficiency and fuel utilization.
Method used
The engine employs two arc-shaped cylinders with pistons moving in opposite directions, utilizing freewheels to convert piston stroke motion directly into torque, ensuring tangential force transmission at a maximum sinusoidal angle of 90°, eliminating the need for a crankshaft and avoiding mechanical dead spots.
Benefits of technology
This design achieves constant torque across a range of engine speeds, enhancing efficiency and enabling fuel savings by maintaining power delivery without delays, as the engine operates with a direct conversion of piston motion into rotational motion.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 0007893417000001 
Figure 0007893417000002 
Figure 0007893417000003
Abstract
The invention is based on two cylinders (7, 7') which are longitudinally arc-shaped, in each of which the pistons (5, 5') are positioned at a minimum distance P from the cylinder head. min From the position P with the maximum distance from the cylinder head max and a shaft (11), the cylinders (7, 7') being arranged so that the movement of the piston (5) in the first cylinder (7) generated by the combustion of fuel in the combustion chamber (4) of the first cylinder (7) and the movement of the piston (5') in the second cylinder (7') generated by the combustion of fuel in the combustion chamber (4') of the second cylinder (7') are in the same direction, the internal combustion engine comprising, on each side of the pistons (5, 5') facing away from the combustion chambers (4, 4'), a connecting rod (6, 6') in the shape of a circular arc in its longitudinal direction, and an associated freewheel for each cylinder (7, 7'), the cylinders (7, 7') being arranged so that the axis of the shaft (11) forms the center point of a circle forming the basis of the circular arc shapes of the cylinders (7, 7') and the connecting rods (6, 6'), and in each case the connecting rods (6, 6') are connected to the pistons (5, 5') of the first and second cylinders (7, 7'). the freewheels are further arranged so that the side opposite to the pistons (5, 5') is connected to the outer part (8, 8') of one of the freewheels, and the inner parts (10, 10') of the freewheels are respectively connected to a shaft (11), the freewheels being arranged so that the movement generated in each case by the combustion of fuel in the combustion chambers (4, 4') of the cylinders (7, 7') and transmitted to the outer parts (8, 8') of the freewheels by the connecting rods (6, 6') of the pistons (5, 5') is transmitted to the shaft (11) so that the freewheels move freely in opposite directions, the outer parts (8, 8') of the freewheels being coupled to one another so as to perform movements in opposite directions, so that the movements of the pistons (5, 5') in the first and second cylinders (7, 7') move in opposite directions, a method for operating such an internal combustion engine, and the use of such an internal combustion engine for driving a motor vehicle, an aircraft or a ship.
Need to check novelty before this filing date? Find Prior Art