Coolant circuit for a coolant-cooled internal combustion engine

US7444962B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Werner Engelin · Eßlingen, DE
• Hartmut Engels · Wolfschlugen, DE
• Erhard Rau · Weilheim, DE
• Jochen Weeber · Echterdingen, DE
• Frank Weinert · Wimsheim, DE

Key dates

• Filing date: Sep 12, 2006
• Grant date: Nov 4, 2008
• Expiry date: Jun 15, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B75/22
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a coolant circuit for an internal combustion engine having two cylinder banks, a radiator for cooling the engine coolant, a pump and a thermostatic valve including a mixing chamber and first and second flow control valves, wherein the pump is connected to the radiator via an intake line for receiving coolant therefrom and supplying it to the cylinder banks which are in communication with the mixing chamber from which a radiator line extends to the radiator for returning heated coolant to the radiator under the control of a flow control valve, or supplying it via a bypass line to the intake line under the control of a bypass valve, a heating circuit is provided extending from one of the cylinder banks via a heater to the pump intake line and a heater control valve is disposed in the heating control circuit so that, upon opening of the heater valve, coolant flows from the other cylinder bank via the mixing chamber to the one cylinder bank and coolant from both cylinder banks jointly flows through the heating circuit back to the pump.