A Quiet/Cool Exhausting Internal Combustion Engine Using a Highly Efficient, Full-Expansion Operating Cycle

Frederick L. Erickson; George S. Lewis

doi:10.4271/891792

1989-09-01

A Quiet/Cool Exhausting Internal Combustion Engine Using a Highly Efficient, Full-Expansion Operating Cycle 891792

The piston engine must limit the combustion gas expansion by venting high pressure gases to avoid negative work. The resulting hot and noisy exhaust release is expected with this type of engine.

A practical engine cycle and mechanism have been developed that extracts more work as the gases are expanded down to atmospheric pressure. The mechanism is the Migrating Combustion Chamber (MCC) engine and operates on a new cycle at an increased efficiency with a quiet, cool, zero positive pressure blow down. The typical muffler system is therefore eliminated. The required 3 to 3.5 ratio of expansion volume to swept intake volume, rapid large area porting, and low pumping and frictional losses are achieved by the use of an additional expansion chamber inherent in the MCC engine design.

Operational characteristics and performance data are presented on prototype engines up to 5 HP and compared against commercially available counterpart piston engines.

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 Quiet/Cool Exhausting Internal Combustion Engine Using a Highly Efficient, Full-Expansion Operating Cycle 891792

SAE MOBILUS