This is one cylinder axial engine which uses reciprocating action of piston for two phase compression to attain high compression ratio.Two phase compression increases compression ratio. It uses special type of multipurpose quad-laterally driven scotch yoke actuator. Scotch yoke actuator has multiple slots which increases the rotation force application area. Each slot is a H-slot (have four partitions) which is quad-laterally driven in a special way. For details please refer to Indian patent 201921020756.

1. One Cylinder Axial Engine
Dr. Ravi Shankar Gautam
ravishankargautam@gmail.com
(Multi H-slot Scotch Yoke Actuator)
Indian Patent No. 201921020756

2. Overview
•Fuel suction and compression into ignition chamber
by Reciprocrating action of piston
•Rotation of the Flywheel
<->Reciprocrating action of piston

3. •Two phase compression
•Mutlipurpose Scotch Yoke Actuator
• Yoke slot
- H-slot Quad-laterally operated
• More than one slot
•Yoke rod
-transfer compressed air-fuel mixture
Overview – contd.

4. Advantages
Two phase compression
•reduces traversal distance of scotch yoke
required for higher compression ratio
•Reduces the length of ignition chamber
required for higher amount of fuel
•lesser weight of ignition chamber

6. Front Side
Auxiliary Compression Chamber
Flywheel (Rotatory motion)
Auxiliary fuel inlet valve
Rear Side (Fuel - Suction Compression Ignition)
Combustion/Ignition chamber
Scotch-Yoke Operation chamber
Multi-Slot-Scotch-Yoke Actuator
Multi-Slot-Scotch-Yoke Operation Mechanism
Parts

7. Front
Side
Rear Side

8. •Ignition Chamber
Enclosure: Cylindrical enclosure
- Primary fuel inlet valve
- Exhaust valve
- Spark Plug
•Flywheel Gear
- Crown gear mounted on Auxiliary Compression Chamber
•Auxiliary Compression Chamber
Enclosure: Cylindrical cavity in a rectangular enclosure
- Auxiliary fuel inlet valve

10. •Scotch Yoke Operation chamber (SOC)
Enclosure: rectangular enclosure
-Between auxiliary comp chamber and ignition chamber
-Yoke H-slot(s) (Quad-partitioned)
-Quad-lateral Crank-Pin set(s) of scotch yoke actuator
(operating yoke slots)
-Scotch yoke operation mechanism
(Quad-lateral Cam follower gears operating Crank-Pin set(s))
-Support rods of scotch yoke
(Front, Rear and Inter-slot support rods)

11. Scotch Yoke Actuator
Salient features
•Quad-laterally operated multi purpose scotch yoke
•Quad-laterally operated H-slot (Quad partitioned slot)
•multiple slots (instead of just one)
•Quad-lateral crankpin set(s)
•double action - piston plates on both ends of yoke
•Passage for compressed gas
- piston plates with hole at center
mounted with pressure valves
- Yoke is continuous rod with longitudinal hole
- Yoke passes through yoke slots

12. Scotch Yoke Actuator
Parts and Assembly
•H-slots quad-partitioned
left right upper and bottom sub-slots
•Quad-lateral crank-pin set for each slot
four crank gears with pin
each pin engages one sub-slot

13. •Yoke rod
- continuous rod passing through yoke slots
- longitudinal passage hole along its length
•Piston plates
- front and rear end of yoke rod
- hole mounted with pressure valve
- valve opening into and out of yoke rod passage

14. •Support rods
- front yoke rod support, (YRS1)
- rear yoke rod support (YRS2)
- Inter-slot reinforcement mechanism
- Inter-slot rod support
Advantages
- No torsional twisting
- rotational force distributed over larger space
- lesser sideward thrust and hence lesser friction

19. Multi-Slot-Scotch-Yoke Actuator (Configuration)
•Two pins - moving in yoke slot in opposite direction
•Two Cranks - rotate in opposite direction
Four configurations - Each with different operation
mechanism

24. Multi-Slot-Scotch-Yoke Actuator (function)
- Suction & Compression
- Rotation <->Translation
- Reciprocrating motion
- Passage of compressed fuel from
compression chamber to ignition chamber

25. Multi-Slot-Scotch-Yoke operation mechanism
-Coupling between Flywheel Gear and Scotch-Yoke Actuator
-Transmission mechanism
rotation from flywheel gear with cam gear
- Cam gear
- Cam axis
connect cam gear to crank gear

26. Coupling
Crown Gear mounted on
ignition chamber cylinder
meshed with spur gear mounted to the
wheel of Scotch-Yoke mechanism

28. Fu
el
val
ve
Fuel valve
Ignition
chamber
PIN CRANK
YOKE
Spark
Plug
YOKE
Slot
Flywheel

29. Fuel Suction Supply and Compression
Two Phase Compression
•Compression chamber (Rearward motion of
scotch yoke)
•Ignition chamber (Forward motion of scotch
yoke)
•Fuel Suction in Compression chamber
(Forward motion of scotch yoke)
•Fuel Supply to Ignition chamber
(Rearward motion of scotch yoke)

30. Coupling Rear and Front part
Rotatory motion of Flywheel gear is utilized to
Drive specially designed scotch yoke actuator via
scotch yoke operation mechanism for
exhaust, suction and compression phase
During Combustion phase expansion of gas is
transmitted to Flywheel gear as rotation force via
scotch yoke actuator and
scotch yoke operation mechanism

31. Possible Applications
Aircrafts driven by propellers
Underwater application like torpedo drones
Propeller blades can mounted on the side gear and
Flywheel gears

32. Thank You