The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1988
Filed:
Mar. 30, 1987
Masato Itakura, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A cooling systems controller for internal combustion engines having two circuits of cooling water for cylinder head side and cylinder block side, each of two circuits being provided with a radiator, a water jacket, a water pump, a conduit, a return passageway, a bypass passageway, a mixing valve, and a motor fan; two heater circuits being provided so as to branch from and return to said main two cooling water circuits, said heater circuits being provided with a first selector valve to junction them and a second selector valve to separate them, said selector valve having a function to supply the higher temperature water from either of two water circuits to a heater radiator by the signals from a control unit for judging which temperature of two circuits is higher, thereby making it possible to obtain more rapid heating effect at the time immediately after starting up the engine without reducing the heating efficiency during normal runs of vehicle.