Hand-guided, portable tool with internal combustion engine

Details Hand-guided, portable tool with internal combustion engine Hand-guided, portable tool with internal combustion engine

1997-02-07

1998-04-28

Miles, Tim R.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

261 35, 261DIG68, 261 721, F02M 1704

Patent

active

057432406

ABSTRACT:
A hand-guided, portable tool includes a housing and an internal combustion engine mounted in the housing. A fuel tank is mounted in the housing. The internal combustion engine has a carburetor with induction port for preparing a fuel/air mixture. An air filter is mounted in the housing. The air filter has a clean air side that is connected to the induction port. The internal combustion engine also has a control chamber with inlet valve. The control chamber is filled with fuel supplied thereto via the inlet valve from the fuel tank. The control chamber supplies fuel to the carburetor. The internal combustion engine has a compensation chamber delimited on one side by a control diaphragm that controls the inlet valve. The compensation line connects the compensation chamber to the clean air side of the air filter. The compensation line has a first connection section connected to the clean air side of the air filter and a second connection section connected to the compensation chamber. A pressure-equalization line for connecting the fuel tank to the clean air side of the air filter is provided, wherein the pressure-equalization line opens into the compensation line at a location between the first and second connection sections.

REFERENCES:
patent: 3174732 (1965-03-01), Brown
patent: 3610220 (1971-10-01), Yamada et al.
patent: 3610221 (1971-10-01), Stoltman
patent: 5056493 (1991-10-01), Holzer
patent: 5073307 (1991-12-01), Langer et al.
patent: 5215132 (1993-06-01), Kobayashi
patent: 5429776 (1995-07-01), Edlund
patent: 5526843 (1996-06-01), Wolf et al.

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