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. 01, 1983
Filed:
Nov. 27, 1981
Tatsumi Furukubo, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A cooling system for an engine which has head and block cooling jackets and a radiator, including head and block coolant pumps, a block recirculation conduit from the block outlet to the block inlet, a main recirculation conduit from the head outlet to the head inlet via the radiator, a first junction providing sometimes communication between upstream parts of the block recirculation conduit and the main recirculation conduit, a second junction providing communication between a downstream part of the block recirculation conduit and a part of the main recirculation conduit at the downstream side of the radiator, and a mechanical non-electrical control valve assembly which is incorporated in the first junction and controls the allocation of head flow and block flow between the block recirculation conduit and the main recirculation conduit, according to the temperature of the coolant leaving the block jacket. The control valve assembly, when this temperature is below a first value, directs both head and block flow through the block recirculation conduit, bypassing the radiator; when this temperature is between the first value and a second value higher than the first value, directs the head flow through the main recirculation conduit, but directs the block flow through the block recirculation conduit; and when this temperature is above the second valve, directs both head and block flow through the main recirculation conduit.