Application Of The AVL High Compression Lean Burn System To Passenger Car Engines

Friedrich Quissek; Leopold A. Mikulic; Wolfgang Bandel

doi:10.4271/885092

1988-09-01

Application Of The AVL High Compression Lean Burn System To Passenger Car Engines 885092

The AVL-HCLB ( High Compression Lean Burn) Combustion System development work, carried out on a single cylinder research engine and a first generation 4IL engines for passenger car application, has led to intensified R&D acitivity on soma particular features of the AVL System to enable its full fuel economy potential to be realized -while still conforming with current and proposed exhaust emission standards.

It is shown that, compared with cast iron, aluminum is the better cylinder head material also for HCLB engines. A Variable Swirl Intake Port developed at AVL has enabled WOT ( Wide Open Throttle) performance and upper part load NOx emissions characteristics to be improved.

By means of an air flow/fuel flow and engine speed governed engine management system, the upper part load BSFC and NO_X emission trade off of the HCLB-englnes has been optimized. An EGR-valve with a non linear flow characteristic has proven to be an important contributing factor in this respect. Finally, SEFI ( Sequential Fuel Injection)-timing strategies are discussed, and their influence on combustion, exhaust emissions and on transient enrichment fuel requirements is shown.

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

Application Of The AVL High Compression Lean Burn System To Passenger Car Engines 885092

SAE MOBILUS