Basic Design of the Rand Cam Engine

Clark, Nigel N.; Smith, James E.; Mucino, Victor H.; Wohl, Ralf; Thompson, Gregory; McDaniel, T.; Smith, Jeffery

doi:10.4271/930062

Cited by 4 publications

(2 citation statements)

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“…The transverse load acting on the follower's pin can be the result of a combination of inertia loads plus other external forces acting on the follower as a result of the particular application of the mechanism. One such application is the positive displacement vane engine described by Clark et al (1993). The loads used in this example are obtained from the dynamic analysis of this positive displacement vane engine described by Thompson et al (1993).…”

Section: Electronic Accessmentioning

confidence: 99%

“…In this mechanism the follower provides an axial lift-dwell-return-dwell motion to a vane used in connection with a compression expansion function required for operation of an internal combustion engine. While a description of this engine is beyond the scope of this paper (Clark et al, 1993), a critical issue is the separation of the load bearing function from the sealing function required for an engine operation. The main function of the pin is to provide load-bearing capacity and thus, the concern addressed in the context of this paper relates to the hydrodynamic behavior of the follower within the clearance of the cam track.…”

Section: Application To a Positive Displacement Cylindrical Cammentioning

confidence: 99%

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Hydrodynamic mobility analysis of axial vane lift mechanisms in cylindrical cams

Mucino

Smith

Sun

2000

Industrial Lubrication and Tribology

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In this paper a new method for the hydrodynamic analysis of a sliding cylinder in a lubricated parallel track is presented. The method is an extension of Booker’s “Mobility Method” (developed for cylindrical journal bearings) for the case of a non‐rotating sliding cylinder in a parallel track. In this application, the clearance between the track and the cylinder, the viscosity of the lubricant, the radius and length of the pin, the sliding velocity and the applied transverse load determine the hydrodynamic behavior of the slider cylinder. An axial positive displacement vane device is used to illustrate the applicability of the hydrodynamic mobility approach for a lubrication analysis. A rotor and a stationary cylindrical cam with cycloidal tracks drive the axicycloidal motion of vanes. A case analysis is presented for a device running at constant speed, in which the inertia forces, friction forces and direct vane loads are taken into account to determine the hydrodynamic behavior of the sliding pins. The following results are produced: pin eccentricity paths, minimum lubricant film thickness history, peak film pressure history and pressure distributions on the cylindrical at any point of the motion. Results show small departures from the purely cycloidal lift‐dwell‐return‐dwell motion of the vanes due to the hydrodynamic performance of the pins.

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Section: Electronic Accessmentioning

confidence: 99%

Section: Application To a Positive Displacement Cylindrical Cammentioning

confidence: 99%