Patent · US Expired

Control circuit for controlling at least one solenoid valve for fuel metering in an internal combustion engine

US6526945B2 · kind B2 · utility

6Cited by

7References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Achim Herzog · Backnang, DE
Traugot Degler · Ditzingen, DE
Andreas Koch · Heiligenhaus, DE

Key dates

Filing date	May 8, 2001
Grant date	Mar 4, 2003
Priority date	—
Expiry date	May 27, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2006
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A control circuit for controlling solenoid valves for fuel metering in an internal combustion engine (banks I and II) includes a recharge circuit having a throttle coil in series with a diode and with a storage capacitor, as well as an FET power transistor connected in parallel with the series circuit of the diode and the storage capacitor. The solenoid valves of the individual banks are switched off during the rapid extinguishing with a voltage produced by the recharge circuit. To minimize the influence of the supply voltage, which comprises a wide range, the HS-FET is switched off during the rapid extinguishing phases.

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