Patent · US Expired

Air flow meter for internal combustion engine

US4043188A · kind A · utility

2Cited by

2References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Volkhard Stein · Stuttgart, DE
Wolf Wessel · Oberriexingen, DE

Key dates

Filing date	Nov 22, 1976
Grant date	Aug 23, 1977
Priority date	—
Expiry date	Nov 22, 1996

Classification

Technology area (CPC G)Physics
CPC primaryG01F1/28
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The air flow rate meter in the induction tube of an internal combustion engine is a pivoting sector which has axial valve elements which cooperate with similar elements in the pivotal shaft to provide fuel metering in proportion to the excursion of the air flow rate meter due to the air flow. Parasitic leakage flow of air past the side walls of the pivoting sector is reduced by providing surface features, such as raised strips or fences, bored depressions, indentations and the like which cooperate with the induction tube wall which may have similar features to induce flow impedance and prevent unwanted air flow past the meter.

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