EP 1380729 A1 20040114 - Compression release mechanism for internal combustion engine
Title (en)
Compression release mechanism for internal combustion engine
Title (de)
Dekompressionsanordnung für Brennkraftmaschine
Title (fr)
Dispositif de décompression pour moteur à combustion interne
Publication
Application
Priority
- US 39444502 P 20020708
- US 32829002 A 20021223
Abstract (en)
A compression release device (70) for a small internal combustion engine, including a flyweight (102) operatively coupled to a cam member (90) via a cam pivot shaft (100), wherein a lever arm (LA1-LA1) associated with the flyweight is longer than a lever arm (LA2-LA2) associated with the cam member, such that a relatively small component of pivotal movement of the flyweight is translated into a relatively large component of rotation of the cam member. At engine cranking speeds, a spring (112) biases the flyweight to a first position, such that a cam surface (96) of the cam member extends beyond the base circle of the exhaust cam lobe (58b) to partially open the exhaust valve (62b) and allow release of pressure within the combustion chamber of the engine. At engine running speeds, the flyweight is moved under centrifugal force to a second position, rotating the cam member to a corresponding second position in which the cam surface is disposed within the base circle of the exhaust cam lobe, such that combustion may occur in a conventional manner. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
F01L 13/08 (2006.01); F02N 17/08 (2006.01); F02N 19/00 (2010.01)
CPC (source: EP US)
F01L 13/08 (2013.01 - EP US); F01L 13/085 (2013.01 - EP US); F02N 19/004 (2013.01 - EP US)
Citation (search report)
- [X] US 4898133 A 19900206 - BADER MARK S [US]
- [A] US 6394054 B1 20020528 - RADO GORDON E [US], et al
- [A] EP 1101903 A1 20010523 - TECUMSEH PRODUCTS CO [US]
- [A] EP 0407699 A1 19910116 - TECUMSEH PRODUCTS CO [US]
- [A] US 5197422 A 19930330 - OLEKSY PAUL D [US], et al
- [AD] US 6295959 B1 20011002 - MOLINA ROBERTO [IT], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03015089 A 20030703; US 32829002 A 20021223