1. Dept of Technology Management
11/14/2018
THE WAISSI ENGINE
“simplest combustion engine”
Presentation at
Xxxxxxxxxxx
May 29, 2013
Gary R. Waissi, Ph.D.
Robert Waissi, M.A. Industrial Design
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

2. contact information
WAISSI ENGINE LLC
4336 W Hackamore Drive
Phoenix, Arizona 85083
U.S.A.
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

3. THE WAISSI ENGINE References:
U.S. Pat. No. 8,109,244 B1, Waissi, G., Crankdisk Bearing Alternatives for the Waissi Type Opposed Piston Internal Combustion Engine (2/7/2012).
U.S. Pat. No. 5,402,755, Waissi, G., Internal Combustion (IC) Engine (4/4/1995).
Internal Combustion Engine with Minimum Number of Moving Parts, Futuristic Concepts in Engines and Components, SAE SP-1108, Paper # , 1995.
Crankdisk Bearing Support for the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (pending).
Alternative Crankdisk Bearing Support for the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (pending).
Bearing Ring and Piston of the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (patent application to be filed).
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

4. THE WAISSI ENGINE Background The Engine Advantages
TOPICS
Background
The Engine
Advantages
Piston speed, acceleration, piston force simulation
Simple Engine Animation
Engine- and engine part solid models
References
11/14/2018
11/14/2018 4
WAISSI ENGINE LLC
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5. THE WAISSI ENGINE Background
Major Boxer Engine Manufacturers (horizontally opposed cylinders)
Volkswagen (type I, type II, type III, type IV engines)
Porsche (912, 914, 911, Boxter)
BMW (motorcycles, e.g. R1200; R90S; R65, R50, R5; many models…)
Honda (motorcycles, e.g. Valkyrie/GL1500, Goldwing)
Subaru (EJ series (EJ15,16,18,20); EA series (EA53, EA 61,62, 63, 64, 65, 71, 72 , etc; many models))
Aircraft Engines
Continental Motors (used e.g. in various Cessna light aircraft)
Lycoming (over 580 certified models from 4-cyl to 8-cyl horizontally opposed)
Rotax (subsidiary of Bombardier Recreational Vehicles; including UAV’s; helicopters; karts, etc.)
Goebler-Hirth (including UAVs (Northrop-Grumman), helicopters, etc.)
Franklin (two models; 235; 350)
11/14/2018
WAISSI ENGINE LLC
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6. THE WAISSI ENGINE Engine Cross Section - sketch 11/14/2018
WAISSI ENGINE LLC
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7. THE WAISSI ENGINE Conventional Engine WAISSI Engine
Advantages: Dynamic Engine Balancing – No secondary piston forces
Source: Waissi, G., SAE SP-1108, Paper # , 1995
Conventional Engine WAISSI Engine
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WAISSI ENGINE LLC
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8. THE WAISSI ENGINE Conventional Engine WAISSI Engine
Advantages: Friction – Piston force against cylinder wall
Source: Waissi, G., SAE SP-1108, Paper # , 1995
Conventional Engine WAISSI Engine
11/14/2018
WAISSI ENGINE LLC
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9. THE WAISSI ENGINE Conventional Engine WAISSI Engine
Advantages: Friction – piston rod big end bearing pressure vs. WAISSI engine bearing ring
Source: Waissi, G., SAE SP-1108, Paper # , 1995
Conventional Engine WAISSI Engine
This means an approximately 60% reduction when comparing the
connecting rod big end pressure of a conventional engine to the
bearing ring pressure of the Waissi engine.
(Corrected GW, 10/06/1998)
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

10. THE WAISSI ENGINE Engine Crankdisk Rotation – sketch and example
For example:
Changing the stroke requires only changing the disk.
Changing the off-centered distance (drive shaft center to disk center) from 30 mm to 20 mm changes the stroke from 60 mm to 40 mm
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

11. THE WAISSI ENGINE
Engine inertia – connecting rod length, stroke and piston speed
Example:
HYPOTHETICAL --- to demonstrate the impact of connecting rod length and stroke relationship to piston speed curve
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

12. THE WAISSI ENGINE
Engine inertia – connecting rod length, stroke and piston acceleration
Example:
HYPOTHETICAL --- to demonstrate the impact of connecting rod length and stroke to piston acceleration curve
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

13. THE WAISSI ENGINE
Engine inertia – Mitsubishi EVO III and Waissi Engine: piston speed comparison
Example: Mitsubishi EVO III
impact of connecting rod length and stroke to piston speed curve
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

14. THE WAISSI ENGINE
Engine inertia – Mitsubishi EVO III and Waissi Engine: piston acceleration comparison
Example: Mitsubishi EVO III
impact of connecting rod length and stroke to piston acceleration curve
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

15. THE WAISSI ENGINE
Engine inertia – Mitsubishi EVO III and Waissi Engine: piston force comparison
Note 1: A conservative estimate using same
measurements. For an actual engine the reciprocating mass
of the Waissi Engine will be larger than that of a comparable
conventional engine and the piston maximum force difference
will be larger as found in simulations.
Note 2: A similar force relationship is true for all reciprocating combustion engines using connecting rods, and therefore
also for work/energy output related relationships.
11/14/2018
WAISSI ENGINE LLC
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16. THE WAISSI ENGINE
Engine inertia – Mitsubishi EVO III and Waissi Engine: expected piston force
Note 1:
Expected piston force comparison (inertia only), and assuming that combustion related (heat expansion) forces are the same respectively.
Note 2:
The Waissi Engine piston force curve represents the ideal (or optimum) force curve, which no piston engine
with connecting rods can achieve.
Note3:
In order for a conventional engine to reach the ideal piston force curve the piston rod should be infinitely long.
Therefore, the larger the piston rod/stroke ratio the better (closer to optimum) the piston force curve.
(See next comparison to the F1- engine).
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

17. THE WAISSI ENGINE
Comparison of piston speed curves between the Waissi Engine and the F1- engine.
In order to reach the ideal piston force curve the piston rod should be infinitely long.
Therefore, the larger the piston rod/stroke ratio the better (closer to optimum) the piston force curve.
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

18. THE WAISSI ENGINE
Comparison of piston acceleration curves between the Waissi Engine and the F1- engine.
For both engines the piston acceleration curve (at BDC) approaches a single point respectively. The F-1 engine piston acceleration curve approaches, when compared to a conventional engine, the Waissi Engine piston acceleration curve.
11/14/2018
WAISSI ENGINE LLC
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19. THE WAISSI ENGINE
Comparison of piston force curves between the Waissi Engine and the F1- engine.
For both engines the piston force curve (at BDC) approaches a single point respectively. The F-1 engine piston force curve approaches, when compared to a conventional engine, the Waissi Engine piston force curve.
Note: at maximum (global optimum) Waissi Engine piston force is 24 % higher than that of a comparable F-1 engine. (even if we assume that the reciprocating mass is the same).
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

20. THE WAISSI ENGINE The Engine Concept Animation 11/14/2018
WAISSI ENGINE LLC
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21. THE WAISSI ENGINE 11/14/2018 WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved

22. THE WAISSI ENGINE References:
U.S. Pat. No. 8,109,244 B1, Waissi, G., Crankdisk Bearing Alternatives for the Waissi Type Opposed Piston Internal Combustion Engine (2/7/2012).
U.S. Pat. No. 5,402,755, Waissi, G., Internal Combustion (IC) Engine (4/4/1995).
Internal Combustion Engine with Minimum Number of Moving Parts, Futuristic Concepts in Engines and Components, SAE SP-1108, Paper # , 1995.
Crankdisk Bearing Support for the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (pending).
Alternative Crankdisk Bearing Support for the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (pending).
Bearing Ring and Piston of the Waissi Internal Combustion Engine, Waissi, G., and Waissi, R., (patent application to be filed).
11/14/2018
WAISSI ENGINE LLC
© copyrighted presentation and materials; all rights reserved