Cooling system for an internal-combustion engine of a motor vehicle with a thermostatic valve having an electrically heatable expansion element

US5482010A · kind A · utility

Assignees

• Bayerische Motoren Werke Aktiengesellschaft · DE
• Behr-Thomson-Dehnstoffregler GmbH & Co. · DE

Inventors

• Heinz Lemberger · Seßlach, DE
• Gerhart Huemer · Neukeferloh, DE
• Peter Leu · Seojong-myeon, KR

Key dates

• Filing date: Jul 19, 1994
• Grant date: Jan 9, 1996
• Expiry date: Jul 19, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01P2070/04
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In the case of a cooling system for an internal-combustion engine of a motor vehicle comprising a radiator and a thermostatic valve equipped with an electrically heatable expansion element, it is provided that, by means of three comparison stages which are connected in parallel, specifically a speed comparison stage, a load condition comparison stage and an intake air temperature comparison stage of a control, electric energy can be supplied to the expansion element of the thermostatic valve so that, depending on the demand, the temperature level of the coolant and thus of the internal-combustion engine switches from a high temperature level to a lower temperature level; that is, increases the cooling output depending on the demand.