Patent · US Expired

Control of supercharged internal combustion engines

US5121604A · kind A · utility

30Cited by

5References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Joachim Berger · Bad Sobernheim, DE
Manfred Birk · Oberriexingen, DE
Hermann Kull · Stuttgart, DE
Wilfried Sautter

Key dates

Filing date	Jan 8, 1990
Grant date	Jun 16, 1992
Priority date	—
Expiry date	Jan 8, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a turbocharged diesel engine (10), the charging pressure P.sub.La is adjusted to run the engine (10) with an empirically determined optimum fuel consumption. A charging pressure feedback signal P.sub.La is fed to a regulating device (40) which receives various operating parameters, including ME.sub.d which represents the power output. A characteristic field in a memory zone (50) in the regulating device (40) determines a control variable (TV) which operates a turbine by-pass valve (22) via an electro-pneumatic converter (28) and a penumatic (vacuum) actuator (26). The characteristic field is such that the charging presssure P.sub.La is reduced in the part load range (cruising speed) to improve fuel consumption.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.