Coolant pump with integrated closed-loop control

US10400659B2 · kind B2 · utility

Assignee

• NIDEC GPM GMBH · DE

Inventors

• Jens Hoffmann · Darmstadt, DE
• Franz Pawellek · Herbstein, DE

Key dates

• Filing date: Jul 17, 2015
• Grant date: Sep 3, 2019
• Expiry date: Jan 20, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2270/64
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A coolant pump for an internal combustion engine (ICE) in a vehicle with a central engine control, having a pump shaft that drives an impeller for pumping a coolant. An axial piston pump operated via a wobble plate on a rear face of the impeller, conducts part of the pumped coolant away to a hydraulic circuit that extends from the axial piston pump via a proportional valve back to the pumped coolant and has a branch-off between the axial piston pump and the proportional valve as the hydraulic actuator. A regulating slide valve adjusts coolant volume flow of depending on pressure in the hydraulic circuit. A sensor detects a parameter characteristic of the coolant volume flow and outputs an actual value signal. A dedicated pump control controls the proportional valve based on the actual value signal of the sensor and a desired value signal of the central engine control.