Two-stroke internal combustion engine with oil ring
AssigneeFEV Engine Technology
InventorPeter Hofbauer
Life of this patent
Estimating the term…
Abstract
A two-stroke internal combustion engine having a seal assembly disposed between a piston and a running surface. The seal both lubricates and prevents exhaust of combustion gases. A first element, which ensures gas tightness, is received in a countersunk portion of the running surface. A second element, which ensures oil tightness, is partially embedded into the first element. A biasing element presses the second element against the first element so that the second and third elements are at least partially held within the first element.
Claims18
A two-stroke internal combustion engine with at least one port of a gas control system for an intake and/or exhaust, comprising:
- a combination seal comprising at least a first element having a U-shaped section with a first leg and a second leg, said second leg extending to a piston and providing a gas seal and counter sunk into a running surface, and a second element having a recess adjacent said piston, providing an oil seal and embedded at least partially into said first element;
- said combination seal located at least partially in a gap between said reciprocating piston and said running surface surrounding said piston.
A combination seal for arrangement between a piston and a cylinder wall of an internal combustion engine opposite said piston, said combination seal comprising:
- an inner side providing a gas seal and an oil seal;
- said combination seal further comprising:
- a first element, a second element and a third element;
- said first element forming an outer side, having a U-shaped section with a first leg and a second leg, said second leg being longer than said first leg and guaranteeing said gas seal on said inner side;
- said second element embedded within said first element, having a recess adjacent said inner side and guaranteeing said oil seal on said inner side;
- and
- said third element embedded within said first element and exerting a force on at least said second element, said force providing movement of said second element in a directions generally towards said inner side.
A two-stroke internal combustion engine with at least one port of a gas control system for an intake and/or exhaust, comprising:
- a combination seal counter sunk into a running surface having at least a first element having a U-shaped section with a first leg and a second leg, said first leg and said second leg being of unequal length and said second leg extending to a piston and providing a gas seal, and a second element embedded at least partially into said first element;
- said combination seal located at least partially in a gap between said reciprocating piston and said running surface surrounding said piston.
Dependencies are inferred from the claim text.