Engine cooling system
AssigneeVolvo Trucks North America, Inc.
InventorDennis Langervik
Life of this patent
Estimating the term…
Abstract
An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.
Claims28
In a turbo charged engine, an improved cooling system comprising at least one conduit connecting a pressurized engine air intake to an inlet to an expansion tank of the cooling system whereby to raise the pressure in the cooling system and thereby enable an increase of the maximum temperature which coolant in the cooling system can reach and a floating check valve in said tank that prevents said coolant from entering said at least one conduit when a level of said coolant exceeds a predetermined level.
In a vehicle having a turbo charged engine equipped with a cooling system, a system for elevating the maximum temperature of coolant in the system, the system comprising:
- a) an expansion tank forming a part of the system;
- b) the tank having a pressure relief and coolant overflow valve and a vacuum relief valve;
- c) the tank also having a floating check valve;
- d) a conduit connecting a pressurized air intake manifold of the engine to the check valve, said check valve prevents coolant from entering said at least one conduit when a level of said coolant exceeds a predetermined level;
- and,
- e) a flow control valve in the conduit.
In a powered mechanism including a combustion engine having a liquid cooling system, an arrangement for elevating the available operating temperature of the engine comprising:
- a) a source of air under pressure;
- b) a conduit connecting the source to an inlet to an expansion tank of the system;
- c) a floating check valve in said tank that prevents coolant from entering said conduit when a level of said coolant exceeds a predetermined level.
A process of improving engine performances with elevated operating temperatures comprising:
- a) delivering air under pressure in excess of ambient pressures from a pressurizing source to an engine cooling system;
- b) controlling the pressure in the system by delivering the pressurized air via a valve;
- and,
- c) preventing coolant from entering said pressurizing source when a level of coolant in the cooling system exceeds a predetermined level.
Dependencies are inferred from the claim text.