Cooling water circulation device
AssigneeHino Motors, Ltd.
InventorMinoru Kowada
Life of this patent
Estimating the term…
Abstract
In a cooling water circulation device for use in a NOx reduction system where a urea injector 3 is positioned higher than an engine 1, a three-way branching device 10 is arranged at a highest position in a passage of passing cooling water 2 from the engine 1 to the urea injector 3 and returning the same to the engine 1 to add an upward air vent 10a. The air vent 10a is connected through an air-venting connecting pipe 11 to a header tank 9 (water pouring tank) for the cooling water 2 arranged higher than the urea injector 3.
Claims4
A cooling water circulation device used in a NOx reduction system with a urea injector arranged higher than an engine, comprising:
- a first three-way branching device arranged at a highest position on a passage of passing cooling water from the engine to the urea injector and returning the cooling water to said engine, thereby adding a first upward air vent, said first air vent being connected through an air-venting connecting pipe to a water pouring tank for the cooling water, said water pouring tank arranged at a position higher than a position of said urea injector.
Dependencies are inferred from the claim text.