Viertaktmotor

Details

Veröffentlichungs-Nr.

EP2607637

Aktenzeichen

EP12008261

Anmeldetag

11. Dezember 2012

Veröffentlichung

14. September 2016

Erteilung

14. September 2016

Rechtsraum

EP

IPC

F01M1/04F01M11/06F01M13/00

Abstract

a four-stroke engine (1) is provided to lubricate driving parts including a crankshaft (24) and valve operating members while circulating oil, using pressure fluctuation in a crank chamber (23), the pressure fluctuation being caused by reciprocating motion of a piston (11). Cam driving parts (31, 33) move with rotation of the crankshaft (24) ; a driving chamber (51) and a rocker chamber (42) are connected to one another; the rocker chamber (42) is connected to the crank chamber (23) and a gas-liquid separator (81); an oil accumulated in a tank (62) is sucked up into the crank chamber (23) and circulated through each part of the four-stroke engine (1); the crank chamber (23) and the driving chamber (51) are connected to one another via a communicating passage (67) and a return passage (68); and the crank chamber (23) and the driving chamber (51) connected to one another via the return passage (68) communicate with one another only when the piston (11) is located in a vicinity of the top dead center.

Anmelder

Firma

Makita Corporation

Land

🇯🇵 Japan

Fachgebiete