Process for operating a fuel-operated vehicle heater and fuel-operated vehicle heater

US11162680B2 · kind B2 · utility

Assignee

• EBERSPÄCHER CLIMATE CONTROL SYSTEMS GMBH · DE

Inventors

• Walter Blaschke · Eßlingen, DE
• Michael Humburg · Göppingen, DE
• Wolfgang Pfister · Eßlingen, DE
• Hans JENSEN · Dettingen unter Teck, DE

Key dates

• Filing date: Feb 25, 2019
• Grant date: Nov 2, 2021
• Expiry date: Nov 7, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23N2241/14
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A fuel-operated vehicle heater includes a burner area (12) with a combustion chamber (14); a fuel pump (24); and a combustion air blower (28). A pressure sensor (38) detects a feed back pressure. An actuating unit (36) actuates the fuel pump (24) with a predefined value of a pump operating variable, and actuates the combustion air blower with a predefined value of a blower operating variable. A heater process includes detecting the feed back pressure in case of a feed operating state set during the combustion operation and comparing the detected feed back pressure (Pe) with an expected feed back pressure (PE) for the set feed operating state. If the detected feed back pressure deviates from the expected feed back pressure the pump operating variable is changed such that the feed back pressure changes toward the expected feed pressure and/or essentially corresponds to the expected feed back pressure.