SEAL STRUCTURE FOR FUEL PUMP UNIT

• Main Authors: SHIMURA, Takeshi, OZAKI, Yoshinobu
• Format: Patent
• Language: English; French; German
• Published: 19.09.2018
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COMBUSTION ENGINES; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PISTONS; SEALINGS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The present invention aims to downsize the installation portion of a unit case (53) and to provide a seal structure of a fuel pump unit (50) which allows to downsize and reduce in weight in the vicinity of the fuel tank (27). An engage convex portion 60 is provided on a part of the flange portion (53L-c) opposite to the outer periphery portion of the unit installing port (55), the seal member (51) has a fitting portion (61) fitted into the engage convex portion (60); an annular fuel seal portion (62) for preventing the fuel leakage from the unit installing port (55) on the inside of the fitting portion (61) in the radial direction; and an annular dust seal portion (63) for preventing the dust from entering from the outside on the outside of the fitting portion (61) in the radial direction, the formed part of the fitting portion (61) and the fuel seal portion (62), and the dust seal portion (63) are integrally formed.