World Library  
Flag as Inappropriate
Email this Article

Orbital engine

Article Id: WHEBN0000633822
Reproduction Date:

Title: Orbital engine  
Author: World Heritage Encyclopedia
Language: English
Subject: Piston engine configurations, Pistonless rotary engine, Flat-ten engine, V5 engine, Rhombic drive
Collection: Australian Inventions, Engine Technology, Pistonless Rotary Engine
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Orbital engine

Engine incorporating OCP (Orbital Combustion Process), on display in Jakarta

The Sarich orbital engine is a type of internal combustion engine, invented in 1972 by Ralph Sarich,[1] an engineer from Perth, Australia, which features orbital rather than reciprocating motion of its internal parts. It differs from the conceptually similar Wankel engine by using a generally prismatic shaped rotor that orbits the axis of the engine, without rotation, rather than the rotating trilobular rotor of the Wankel.

Contents

  • Overview 1
  • Technical problems 2
  • Drawings 3
  • See also 4
  • References 5
  • External links 6

Overview

The theoretical advantage is that there is no high-speed contact area with the engine walls, unlike in the Wankel engine in which edge wear is a problem. However, the combustion chambers are divided by blades which do have contact with both the walls and the rotor, and are said to have been difficult to seal due to the perpendicular intersection with the moving impeller.[2]

Sarich worked on the concept for a number of years without ever producing a production engine. A prototype was demonstrated, running on the bench with no load. The engine, which produces very high revs, has eight moving parts in the six-chambered version depicted in the patent application, plus valves for each chamber. It can supposedly be powered by compressed air or steam[3] and can be run as a pump.

In the patent, the engine is described as two-stroke internal combustion engine,[3] but the patent claims that with a different valve mechanism it could be used a four-stroke engine.[3]

A blower is required as the two stroke cycle does not provide suction to draw the mixture into the chamber.[3]

Technical problems

The Sarich orbital engine has a number of fundamental unsolved problems that have kept it from becoming a usable engine. Some key components cannot be cooled and others cannot readily be lubricated, so it is very susceptible to overheating.[4] At one press conference at which Sarich presented the engine, automotive engineer Phil Irving (designer of the Vincent Motorcycle and Brabham Formula One engines) pointed out a number of technical difficulties. Some processes developed for the engine could be used for other engines, such as the Orbital Combustion Process, an air/fuel precompresser for injection.[5]

Drawings

See also

References

  1. ^ Louise Fleming (2004). Excel HSC Business Studies. Pascal Press. pp. 59–.  
  2. ^ Philippine Technology Journal. 22-23. Science and Technology Information Institute. 1997. pp. 17–. While the Wankel engine rotor has line contact with the internal surface of the housing, the concentric rotary vane internal combustion engine rotor has plane contact with the cylinder. Wankel engine is basically an orbital engine because its ... 
  3. ^ a b c d https://www.google.co.in/patents/US3787150
  4. ^ "Fuel saving follies". ABC Radio National: Ockham’s Razor. 2009-08-30. Retrieved 2012-06-29. 
  5. ^ John Ettlie (7 June 2007). Managing Innovation. Routledge. pp. 204–.  

External links

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.