Fuel filter insert with a prefilter and a main filter element, and fuel filter

US10773190B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Lars Spelter · Ditzingen, DE
• Idriss Razgani · Ludwigsburg, DE
• Jonas Eble · Zell am Harmersbach, DE
• Christoph Baumann · Heubach, DE
• Christopher M. Mueller · Pflugerville, US

Key dates

• Filing date: Sep 13, 2017
• Grant date: Sep 15, 2020
• Expiry date: Jul 22, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M37/54
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A fuel filter insert for a fuel filter has a low-pressure region with prefilter element arranged therein. A high-pressure region arranged fluidically downstream of the low-pressure region has a main filter element arranged therein. Prefilter element and main filter element are arranged one atop the other axially in the fuel filter insert. A wall element projects away from the main filter element in axial direction and extends at least partially through the prefilter element. Low-pressure region and high-pressure region at least over sections thereof are separated from each other by the wall element. A fuel filter is provided with a filter housing in which the fuel filter insert is arranged. The filter housing has a fuel outlet and a fuel inlet for fuel prefiltered by the prefilter element. Fuel inlet and fuel outlet are fluidically positioned between low-pressure region and high-pressure region and a fuel pump is connectable thereto.