Patent ID: 8042499

Claim:
A coolant circulation circuit for an engine comprising: a first coolant line through which coolant heated in an engine and circulated in a radiator passes; a second coolant line through which coolant heated in the engine and circulated in an additional element passes; a bypass coolant line through which a portion of coolant heated in the engine passes; a first chamber where the coolant having passed through the bypass coolant line flows in; a second chamber where the coolant having passed through the second coolant line flows in; a coolant outlet where the coolant flows back into the engine; a partition formed between the first chamber and the second chamber wherein the partition forms the first coolant line; and a thermostat selectively blocking the first chamber from the second chamber; wherein the second chamber is formed by an outer case and fluidly communicates with the second coolant line; and wherein a gap continuously connecting the first chamber with the second chamber is formed between the bypass coolant line and the partition while the bypass coolant line is fluid-connected to the first chamber.