Patent · US Active

Piston engine

US8857177B2 · kind B2 · utility

0Cited by

15References

22Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Alfred Elsässer · Keltern, DE
Hermann Hoffmann · Echterdingen, DE
Sascha Senjic · Stuttgart, DE
Peter Wieske · Ditzingen, DE

Key dates

Filing date	Sep 3, 2008
Grant date	Oct 14, 2014
Priority date	—
Expiry date	Feb 14, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston engine, having at least one cylinder that includes at least a first and a second discharge valve and a double overhead camshaft for controlling the first and a second discharge valves. The double overhead camshaft includes both an inner shaft, which has at least one first cam for controlling the first discharge valve, and an outer shaft that is coaxial to the first inner shaft and has at least one second cam for controlling the second discharge valve. The inner shaft and the outer shaft are rotationally adjustable relative to one another changing the discharge time frame of the discharge valves.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.