Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Shigeo Sasao

Ryuichi Matsushiro

Toshihiko Igashira

Toru Kosuda

Zenichiro Kato

Taro Ikeya

Yoshiharu Chino

Masae Oohori

Yasuaki Uekawa

Touyu Ichimiya

A lubricating apparatus is disclosed for use in an engine having a crankshaft, at least one bearing for the crankshaft, and an oil pan for storing a lubricating oil reserve. The apparatus comprises a pump for pumping the oil up from the oil pan, an oil passage for providing fluid communication between a discharge port of the pump and the bearing to supply the oil to the bearing, and an oil recirculation passage for providing communication between the bearing and an inlet port of the pump to return the oil at the bearing to the pump. The apparatus further includes a temperature activated valve assembly along the recirculation passage. The valve assembly allows the oil to return from the bearing to the pump through the oil recirculation passage, when the temperature of the engine is below a predetermined temperature.

Lubricating apparatus for an engine

An oil pan is provided with a partition member so as to be divided into a main chamber and an antechamber. A vertical wall of the partition member is provided at a lower region thereof with first holes adjacent to an opening of a draft tube of an oil pump and at an upper region thereof with second holes in the vicinity of an oil level. In a state of warming up following the starting, since the oil temperature is low and the viscosity of the oil is large, the oil in the antechamber cannot pass through the first holes. Accordingly, only the oil in the main chamber a quantity of which is small is circulated through the engine by the oil pump, thereby warming up the engine quickly. Low temperature oil in the antechamber is interchanged with the oil in the main chamber little by little through the second holes, so that the temperature thereof is raised gradually. When the viscosity of the oil is decreased as rising of the temperature of the oil, the oil in the antechamber is circulated through the engine by the oil pump in due course.

Warming-up promoting apparatus of internal combustion engine

A sealed type engine cooling system having a reservoir tank connected to the engine recirculating water passageway by inlet pipes connected to the upper outlet of an engine cooling water passageway and to the upper inlet of a radiator. The bottom portion of the reservoir tank is connected to the bottom of the engine cooling water passageway, for supplementing the engine cooling water, and is provided with a cap with a relief valve, to thereby discharge vapor created in the cooling water passageway under a hot soak condition. The relationship between the inner diameter of the pipes is such that the effective cross sectional area of the inlet pipe means is 1.5 to 3 times larger than the effective cross sectional area of the outlet pipe means, or the inlet pipe is arranged so that a minimum distance is obtained between the engine upper portion and the radiator, or a check valve is arranged in the outlet pipe, or the space inside the reservoir tank is partitioned into chambers, and the inlet and outlet pipes are connected to separate chambers.

Cooling system for an internal combustion engine

Growing community of inventors

Nishio, Japan

Shigeo Sasao