A Camshaft Mechanism for Synchronous Phasing Valve Timing

Lance Phoenix; John B. Phoenix

doi:10.4271/910448

1991-02-01

A Camshaft Mechanism for Synchronous Phasing Valve Timing 910448

This paper is a description and analysis of the behaviour of a purely conceptual mechanism or system which is able to vary continuously both the opening and closing angle of internal combustion engine valves which are operated by a double overhead camshaft arrangement of substantially conventional type.

The mechanism is interposed between the camshaft and the drive from the crankshaft and is able to vary the instantaneous phase of the camshaft so as to permit each cam to spend a longer or shorter time in contact with its tappet for a given engine speed.

There is an implicit acceptance in the paper that published work on variable valve timing has demonstrated its desirability if the full potential of the normally aspirated internal combustion engine is to be realised.

The difficulties of producing suitable mechanisms, as shown by the long history of (largely unsuccessful) interest in the subject, is acknowledged.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

A Camshaft Mechanism for Synchronous Phasing Valve Timing 910448

SAE MOBILUS