US 10,927,748 B2Granted

Flow passage device and engine cooling system

AssigneesAisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha

InventorsMasafumi Yoshida, Naoto Yumisashi, Koji Nunami, Masahiro Yoshida, Hirotaka Watanabe, Takahiko Aoyagi, Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Masaaki Yamaguchi

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Abstract

A flow passage device includes a circulation flow passage, a swing valve provided in the circulation flow passage, an energizing part, and a lock mechanism including a lock pin. The lock pin is configured so as to hinder the swing valve from opening, and to allow the swing valve to open. The swing valve is configured so as to rotate from a first valve position to a second valve position. The lock mechanism is configured so as to set a locked state and to set an unlocked state. The lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on a downstream side of the swing valve.

Claims7

Dependent claims

A flow passage device configured to form part of an engine cooling system that cools an engine, the flow passage device comprising:

a circulation flow passage in which a fluid is allowed to circulate between the engine and a radiator;
a swing valve provided in the circulation flow passage, the swing valve being configured so as to open due to fluid differential pressure between upstream of the swing valve and downstream of the swing valve, and to open and rotate to a downstream side;
an energizing part configured to energize the swing valve to a valve closing direction against the fluid differential pressure between the upstream of the swing valve and the downstream of the swing valve in the circulation flow passage;
and a lock mechanism including a lock pin, the lock pin being configured so as to protrude into a rotation region of the swing valve and hinder the swing valve from opening, the lock pin being configured so as to retract from the rotation region of the swing valve such that the swing valve is allowed to open, wherein the swing valve is configured so as to rotate from a first valve position to a second valve position, the first valve position being a position at which the lock mechanism is able to hinder the swing valve from opening, and the second valve position being a position at which the swing valve is open more than the first valve position and the lock mechanism is not able to hinder the swing valve from opening, the lock mechanism is configured so as to set a locked state and set an unlocked state, the locked state being a state in which the lock pin is protruded to a locked position at which the lock pin overlaps the rotation region, and the unlocked state being a state in which the lock pin is retracted to an unlocked position at which the lock pin does not overlap the rotation region, and the lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on the downstream side of the swing valve.

1 more element

An engine cooling system comprising:

a circulation flow passage in which a fluid is allowed to circulate between an engine and a radiator by a pump;
a bypass flow passage connected with the circulation flow passage, the bypass flow passage bypassing the radiator;
a swing valve provided between the radiator and the bypass flow passage in the circulation flow passage, the swing valve being configured so as to open due to fluid differential pressure between upstream of the swing valve and downstream of the swing valve, and rotate and open to a downstream side;
an energizing part configured to energize the swing valve in a valve closing direction against the fluid differential pressure between the upstream of the swing valve and the downstream of the swing valve in the circulation flow passage;
and
a lock mechanism including a lock pin, is the lock pin being configured so as to protrude into a rotation region of the swing valve and thus hinder the swing valve from opening, the lock pin being configured so as to retract from the rotation region of the swing valve such that the swing valve is allowed to open, wherein
the swing valve is configured so as to rotate from a first valve position to a second valve position, the first valve position being a position at which the lock mechanism is able to hinder the swing valve from opening, the second valve position being a position at which the swing valve is open more than the first valve position and the lock mechanism is not able to hinder the swing valve from opening;
the lock mechanism is configured so as to set a locked state and to set an unlocked state, the locked state being a state in which the lock pin is protruded to a locked position at which the lock pin overlaps the rotation region, and the unlocked state being a state in which the lock pin is retracted to an unlocked position at which the lock pin does not overlap the rotation region;
and
the lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on the downstream side of the swing valve.

7 more elements

Dependencies are inferred from the claim text.