US 12,012,914 B2
Fuel pressurization device
Koichi Shinotsuka, Tokyo (JP); Yushi Maruyama, Tokyo (JP); and Toshihisa Nemoto, Tokyo (JP)
Filed by MARUYAMA MFG. CO., INC., Tokyo (JP)
Filed on May 26, 2023, as Appl. No. 18/324,154.
Claims priority of application No. 2022-087625 (JP), filed on May 30, 2022.
Prior Publication US 2023/0383714 A1, Nov. 30, 2023
Int. Cl. F02M 37/00 (2006.01)
CPC F02M 37/0082 (2013.01) [F02M 37/0023 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fuel pressurization device for use with an engine assembly including a pump, a valve, and an engine, the fuel pressurization device comprising:
a fuel chamber to which fuel is supplied from the pump and including an elastically deformable elastic body that forms one side of the fuel chamber, wherein an internal volume of the fuel chamber is variable as the elastic body deforms;
a spring configured to bias the elastic body such that the internal volume of the fuel chamber decreases;
a main body including a first main body portion that houses the spring and a second main body portion forming an opposite side of the fuel chamber,
wherein the first main body portion includes a discharge port fluidly coupled to the fuel chamber, and
wherein the fuel pressurization device is configured to pressure-feed the fuel from the fuel chamber to the engine via the valve of the engine assembly when starting the engine.