Many engines have been proposed to replace piston engines in the marketplace, but to date only the Wankel rotary has gained a foothold. The Rand Cam (RC) engine employs an innovative mechanical scheme to compress and expand the working fluid to provide a venue for four cycle operation. The kinematic characteristics of the motion of the vanes are related to the cam profile, which is designed to minimize contact loads throughout the thermodynamic cycle and to allow sufficient time for combustion at the top dead center stage. The Rand Cam engine is a positive displacement four-stoke engine which consists of a rotor on a shaft sandwiched between two stator halves carrying shaft bearings. Vanes that can move axially through slots in the rotor travel along annular troughs of varying depth machined in the stator and trap the working fluid thus permitting compression and expansion. Gaex change is through ports rather than valves which is of great benefit. Timing of ports and plug position for a spark ignited engine have been assessed, and a plastic engine model have been completed. Machining of a prototype requires computer aided manufacturing equipment. Although complete data on friction loss are not available, a preliminary dynamic model has been proposed.
General design considerations for the Rand CAM engine
Grundlegende Konstruktionsüberlegungen für den Kedernockenmotor
1993
11 Seiten, 19 Bilder, 2 Tabellen, 3 Quellen
Aufsatz (Konferenz)
Englisch
Verbrennungsmotor , Auslegung (Dimension) , Kolbenmotor , Wankelmotor , Fluid , Kinematik , Leitschaufel , Thermodynamik , Verbrennung (Oxidation) , Rotor (Maschine) , Ständer (elektrische Maschine) , Lager (Maschinenelement) , Kompression , Gasgemisch , Sitzventil , Simulationsmodell , Prototyp , CAM (Computer Aided Manufacturing) , Reibungsverlust , Viertaktmotor , Otto-Motor , dynamisches Verhalten , Nocken
Basic Design of the Rand Cam Engine
SAE Technical Papers | 1993
|Basic design of a rand cam engine
Kraftfahrwesen | 1993
|General Friction Considerations for Engine Design
SAE Technical Papers | 1982
|The Rand-Cam Engine: A Pistonless Four Stroke Engine
SAE Technical Papers | 1994
|The rand-cam engine:a pistonless four stroke engine
Kraftfahrwesen | 1994
|