Patent ID: 9222398
Filing Date: 2015-12-29
Classification: F01P

Abstract:
1. An internal combustion engine that has a cooling system of a split-cooling type, comprising: a first coolant loop including a main coolant pump that pumps coolant through a cylinder head coolant jacket; a second coolant loop including a connecting line fluidically coupled to an inlet of a cylinder block coolant jacket; an auxiliary coolant pump arranged in the connecting line; and a coolant-pressure-opened check valve positioned in a line fluidically coupled to an outlet of the cylinder block coolant jacket, the line fluidically coupled to a coolant line of the first coolant loop at a location between the main coolant pump and an inlet of the cylinder head coolant jacket, the check valve controlling flow of coolant from the cylinder block coolant jacket to the first coolant loop based on a pressure of the coolant between the cylinder block coolant jacket and the check valve.