Patent · US Expired

Apparatus for the controlled feeding of volatile fuel components to the intake of an internal combustion engine

US5220897A · kind A · utility

5Cited by

9References

4Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Harald Buchalla · Amorbach, DE
Stefan Burger · Birkenfeld, DE
Rainer Franz · Mannheim, DE
Joachim Heinemann · Weinheim, DE
Reinhard Tinz · Masserberg, DE

Key dates

Filing date	Jan 13, 1992
Grant date	Jun 22, 1993
Priority date	—
Expiry date	Jan 13, 2012

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2025/0845
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A line (3) provided between the head space (11) of the fuel tank (10) and the induction tube (1) of the engine contains an absorption element (9) and can be shut off by a signal-actuated servo valve (8) connected to the outlet from the absorption element. The line (3) is provided with a first sensor (4) preceding the absorption element (9) and detecting gas flows. A vacuum actuator (12) following the servo valve (8) is provided with a second sensor (13) which gives a signal when actuated. The first sensor (4) and the second sensor (13) are connected for carrying signals to a diagnosis block (14) which compares them with the signal (17) actuating the servo valve (8) and uses them for fault diagnosis.

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