Cooling system for automotive engine or the like
AssigneeNissan Motor Co., Ltd.
InventorTakao Kubozuka
Life of this patent
Estimating the term…
Abstract
In order to minimize the size of an evaporation cooled internal combustion engine, the coolant vapor collection space located within the coolant jacket above the most strongly heated structure of the engine is reduced in size and a separator unit, which separates liquid coolant from the gaseous form, is disposed between a vapor manifold mounted on the engine a radiator in which the coolant vapor is condensed to its liquid state. The coolant collected in the separator is pumped back into the coolant jacket at locations where the coolant boils most vigorously. An amount of coolant extracted from a relatively cool section of the coolant jacket is also recirculated by the pump to the same locations.
Claims12
In an internal combustion engine
- a structure subject to high heat flux, and
- a cooling system for removing heat from said structure, said cooling system comprising:
- a cooling circuit including:
- a coolant jacket formed about said structure and into which coolant is introduced in liquid form and permitted to boil;
- a radiator in which gaseous coolant is condensed to its liquid state;
- a vapor manifold communicating with said coolant jacket;
- a vapor transfer conduit leading from said vapor manifold to said radiator;
- separation means disposed in said vapor transfer conduit for separating liquid and gaseous coolant, said separation means including a drain port;
- a first conduit interconnecting said drain port and said coolant jacket;
- a drain pump disposed in said first conduit for inducting coolant from said drain port and for pumping same into said coolant jacket;
- a second conduit leading from said coolant jacket to said first conduit at a location intermediate of said drain port and said pump;
- and
- coolant return means for returning liquid coolant from said radiator to said coolant jacket in a manner to maintain said structure immersed in a predetermined depth of liquid coolant;
Dependencies are inferred from the claim text.