US 12,460,603 B2
Fuel supply device
Yuki Suzuki, Kariya (JP); and Tomihisa Tsuchiya, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Oct. 4, 2024, as Appl. No. 18/906,183.
Claims priority of application No. 2023-198264 (JP), filed on Nov. 22, 2023.
Prior Publication US 2025/0163870 A1, May 22, 2025
Int. Cl. F02B 77/08 (2006.01); F02D 19/02 (2006.01); F02M 21/02 (2006.01); F02M 67/12 (2006.01)
CPC F02M 21/0242 (2013.01) [F02D 19/021 (2013.01); F02M 67/12 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A fuel supply device for an internal combustion engine including a fuel injection valve that injects gas fuel, the fuel supply device comprising:
a fuel tank that stores the gas fuel at high pressure;
a delivery pipe that stores the gas fuel to be supplied to the fuel injection valve;
a supply passage through which the fuel gas supplied from the fuel tank to the delivery pipe flows;
a shut-off valve provided in the supply passage, the shut-off valve being closed when supply of the gas fuel to the delivery pipe is stopped;
an oil supply device that supplies oil to a downstream portion of the supply passage, the downstream portion being a portion between a position of the shut-off valve and a part connected to the delivery pipe; and
a controller that controls the shut-off valve and the oil supply device,
wherein the controller is configured to execute an oil supply process during operation of the internal combustion engine to
close the shut-off valve to stop the supply of the gas fuel to the delivery pipe, and
supply the oil to the downstream portion by the oil supply device when the pressure in the delivery pipe is lower than that before the shut-off valve is closed.