A method for thermally managing an internal combustion engine

Abstract

The present invention provides methods for thermally managing an internal combustion engine during engine warm-up or during warmed-up conditions of the engine. The internal combustion engine comprises an engine block with a fluid coolant flow passage therein, a cylinder head secured to the engine block and provided with a fluid coolant flow passage therein, and a first fluid coolant circuit comprising the fluid coolant flow passages, the internal combustion engine being provided with a second fluid coolant circuit connected to the first fluid coolant circuit and comprising a coolant pump for producing coolant flow in the first fluid coolant circuit, temperature sensing means and valve means. The methods comprise the step of preventing the coolant pump; from pumping the fluid coolant and thus providing a stagnation of the fluid coolant in the first fluid coolant circuit, and / or the step of controlling the coolant pump to produce such a coolant flow so that the temperature of the fluid coolant supplied to the first fluid coolant circuit from the second fluid coolant circuit is at least 10 DEG C lower than the temperature of the fluid coolant discharged from the first fluid coolant circuit to the second fluid coolant circuit.

Description

technical field [0001] The present invention relates to a method of thermally managing an internal combustion engine comprising an engine block having fluid coolant flow passages therein, a cylinder head secured to the engine block and having fluid coolant flow passages therein, and comprising A first fluid coolant circuit of a fluid coolant flow passage, an internal combustion engine having a second fluid coolant circuit connected to the first fluid coolant circuit and comprising heat for transferring heat from the fluid coolant An exchanger, a coolant pump for generating coolant flow in the first fluid coolant circuit, temperature sensing means and valve means. Furthermore, the invention relates to an engine system having an internal combustion engine as described above and at least one engine control unit adapted to carry out the steps of such a method. Background technique [0002] Prior to the present invention, several engine cooling systems or thermal management syst...

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Problems solved by technology

[0010] However, many of the above methods require the provision of additional equipment, such as additional pumps or additional fluid coolant circuits, which impacts engine assembly and production costs

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