Coolant circuit for an internal combustion engine

US10030572B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Georg Chekaiban · Wolnzach, DE
• Rainer Richter · Munich, DE
• Andreas Klemm · Kassel, DE
• Ulrich Wirth · Munich, DE

Key dates

• Filing date: Jun 12, 2015
• Grant date: Jul 24, 2018
• Expiry date: Dec 18, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B29/0437
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A coolant circuit is provided for an internal combustion engine having a compression machine for intake air. The coolant circuit includes a high-temperature circuit and a low temperature circuit. The high-temperature circuit is provided in order to cool the internal combustion engine by way of a coolant radiator and a first coolant pump arranged in the high-temperature circuit. The low-temperature circuit is provided with a second coolant pump in order to cool the intake air compressed by the compression machine by way of an intercooler and in order to cool a coolant of a coolant circuit in a condenser. The high-temperature circuit and the low-temperature circuit are cooling circuits which are separated from each other. The thermal base load of the low-temperature circuit is reduced by this design, whereby the pressure level in the coolant circuit can be reduced resulting positively in a reduction of the energy consumption.