Engine cooling system with two thermostats
AssigneeHyundai Motor Company
InventorGyu Han Hwang
Life of this patent
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Abstract
The present invention relates to an engine cooling system of an automobile, and more particularly, to an engine cooling system having two thermostats which can alleviate engine friction by delaying the flow of cooling water in the cylinder block and as a result can also improve cooling and heating efficiencies in the automobile as the resistance of water passage jacket throughout the engine decreases.
Claims8
An engine cooling system wherein cooling water is supplied into a cylinder head and a cylinder block by water pump and the circulation of said cooling water is selectively directed through a water pump or a radiator, said cylinder head and cylinder block each having an outlet line, the system comprising:
- at least two separate lines to supply cooling water into the cylinder head and the cylinder block;
- a main thermostat disposed in the outlet line of said cylinder head;
- and
- an auxiliary thermostat disposed in the outlet line of said cylinder block and connected to the outlet line of said cylinder head.
- wherein said main thermostat operates at a lower temperature than that of auxiliary thermostat and said auxiliary thermostat supplies a part of said cooling water to the outlet line of said cylinder block in a closed state.
Dependencies are inferred from the claim text.