US 12,263,730 B2
Control valve for fuel tank
Akinari Sugiyama, Koga (JP); Takashi Fukumitsu, Toyota (JP); Makoto Iwase, Toyota (JP); and Hidekazu Fukuoka, Toyota (JP)
Assigned to KYOSAN DENKI CO., LTD., Koga (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 18/273,601
Filed by KYOSAN DENKI CO., LTD., Koga (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
PCT Filed Dec. 24, 2021, PCT No. PCT/JP2021/048360
§ 371(c)(1), (2) Date Jul. 21, 2023,
PCT Pub. No. WO2022/158259, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 2021-007917 (JP), filed on Jan. 21, 2021.
Prior Publication US 2024/0075807 A1, Mar. 7, 2024
Int. Cl. B60K 15/035 (2006.01); F16K 31/18 (2006.01)
CPC B60K 15/03519 (2013.01) [B60K 2015/0358 (2013.01); F16K 31/18 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A fuel-tank control valve comprising:
a casing
that is installed in a fuel tank for a vehicle, and
that includes an upper portion connected to a ventilation path which communicates with the fuel tank;
a valve seat portion that is provided in the casing;
a plate that is arranged to face the valve seat portion on a side where a lower portion of the casing is present relative to the valve seat portion;
a peripheral wall portion that is provided upright from a rim of the plate to the side where the lower portion of the casing is present;
a first gas-storage chamber that is formed of the plate and the peripheral wall portion;
a gas supply hole
that is opened through a top surface of the plate which faces the valve seat portion, the gas supply hole being smaller in size than a bottom opening of the plate, and
that allows gas to be supplied from the first gas-storage chamber into a volume-variable space which is formed between the plate and the valve seat portion;
a clearance
which is formed between the casing and the peripheral wall portion, and
through which fuel in the fuel tank can flow in;
a float
that has buoyancy against the fuel which flows in through the clearance, and
that is provided to be capable of being seated on the valve seat portion by floating up in the volume-variable space by replenishment of the gas to be supplied through the gas supply hole;
a through-hole
that is opened through the float,
that causes the fuel to be suppressed from flowing in through the clearance under a state in which the float is seated on the valve seat portion, and
that allows the gas which has been supplied in the volume-variable space to be discharged to a side where the upper portion is present relative to the valve seat portion as the buoyancy decreases; and
a second gas-storage chamber
that is formed of
a part including the gas supply hole among parts of the plate, and
a partition-wall portion which is provided upright parallel to and away from the peripheral wall portion, and
that is provided in the first gas-storage chamber,
the fuel-tank control valve controlling opening and closing of a fuel flow path in the casing by causing the float to be seated on and unseated from the valve seat portion.