Cooling system for automotive engine or the like

Patent · Mon Jan 06 04:00:00 EST 1986

OSTI ID:6950196

Hayashi, Y

This patent describes a method of a coolant an arrangement, the steps of: boiling a liquid coolant in a coolant jacket; condensing the vapor produced in the boiling step, in a radiator; maintaining the radiator essentially empty of liquid coolant when the engine is warmed-up and running so as to maximize the surface area available for coolant vapor to release its latent heat of evaporation; storing coolant in a reservoir in fluid communication with the radiator; and reducing the surface area of the radiator via which the vapor produced in the coolant jacket can release its latent heat of evaporation by using a pressure differential between the reservoir and the radiator. This develops when the pressure in the radiator falls a predetermined amount below that prevailing in the reservoir to induct additional coolant from the reservoir into the radiator. An internal combustion engine is described having a combustion chamber: a radiator; a coolant jacket in which liquid coolant is boiled and the vapor produced conveyed to the radiator for condensation therein; a reservoir containing liquid coolant; and a first valve fluidly interposed between the radiator and the reservoir which opens in response to a pressure developing in the radiator which is a predetermined amount lower than that prevailing in the reservoir. The first valve is a check valve which permits flow of coolant from the reservoir to the radiator, but which prevents flow of coolant from the radiator to the reservoir.

• Assignee: Nissan Motor Co., Ltd., Yokohama
• Patent Number(s): US 4633822
• OSTI ID: 6950196
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
BOILING
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
COOLANTS
COOLING SYSTEMS
ENERGY SYSTEMS
ENGINES
ENTHALPY
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
HEAT EXCHANGERS
INTERNAL COMBUSTION ENGINES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE DROP
RADIATORS
STORAGE FACILITIES
SURFACE AREA
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
VALVES
VAPOR CONDENSATION
VAPORIZATION HEAT
VEHICLES