Process for driving the exciting coil of an electromagnetically driven reciprocating piston pump

US6024071A · kind A · utility

Assignee

• Ficht GmbH & Co., KG · DE

Inventors

• Wolfgang Heimberg · Ebersberg, DE
• Knut Bartsch · Ebersberg, DE

Key dates

• Filing date: Feb 23, 1998
• Grant date: Feb 15, 2000
• Expiry date: Feb 23, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/2058
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for signalling an energizing coil of a solenoid-operated reciprocating plunger pump employed as a fuel injection device, in which the energizing coil is energized via a current control circuit pulsed at high-frequency by an energizing current and each pulse causes an impulse movement of an armature driven by the energizing coil, and the current control circuit controls the energizing current flowing through the energizing coil as a function of a current setpoint curve, each pulse of the current setpoint curve comprises a gradually rising leading edge resulting in a corresponding gradually rising leading edge of the pulse of the energizing current in the energizing coil, the current setpoint curve being controlled so that the energizing current does not change faster than the maximum change in current possible for the minimum voltage available at the energizing coil and limited due to mutual induction.