Synergies of Variable Valve Actuation and Direct Injection

Wolfgang Salber; Peter Wolters; Thomas Esch; José Geiger; Jochen Dilthey

doi:10.4271/2002-01-0706

2002-03-04

Synergies of Variable Valve Actuation and Direct Injection 2002-01-0706

The main goal in the development of new automobile SI engines is to significantly reduce fuel consumption. To this end both, variable valve actuation and direct gasoline injection, are being pursued as new engine concepts. Both approaches appear to offer approximately the same potential to reduce fuel consumption. The development so far is creating the impression of two competing technical concepts with no obvious way to combine them [1].

The two engine concepts, however, can be combined, although it is often objected that their combination would only yield marginal additional potential. That is true to the extent that the advantages of dethrottling offered by both of the concepts can only be counted once in terms of overall potential. But there is a number of additional effects to be taken into account.

This Paper represents an analysis of the individual potential of the two approaches as well as an estimation of their combined potential. The synergetic effects are discussed and evaluated on the basis of computational and experimental analysis.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $33.00 Print $33.00

Preview Document

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to four to six weeks. We apologize for any inconvenience.

We also recommend:

Standards

SAE MOBILUS®

Publications

News

Events

Professional Development

A World in Motion (K-12)

Membership

Participate with SAE

Donate

Synergies of Variable Valve Actuation and Direct Injection 2002-01-0706

SAE MOBILUS