The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2004
Filed:
Oct. 28, 2002
Lars Andersson, Vastra Frolunda, SE;
Mikael Bergman, Huskvarna, SE;
Aktiebolaget Electrolux, Stockholm, SE;
Abstract
Crankcase scavenged internal combustion engine of two-stroke type ( ) having at least one cylinder ( ) and at least one air passage arranged between an air inlet ( ) and the upper part of a number of scavenging ducts ( ′) with exhaust orientated scavenging ports ( ′) located close to the exhaust port ( ) of the cylinder. At least one intake orientated scavenging port ( ′) is located close to the inlet port ( ) of the cylinder and is fed by at least one scavenging duct ( ′), and the air passage and the scavenging ducts are so arranged that the scavenging ducts ( ′) can be supplied with and hold so much air that they during the following scavenging process will scavenge essentially nothing but air. The air passage is arranged from an air inlet ( ) provided with a restriction valve ( ) controlled by at least one engine parameter such as the carburetor throttle control. The intake orientated scavenging port/s ( ′) is/are so arranged that it/they begin/s to scavenge the air and fuel-mixture ( ) later than the scavenging ports ( ′) begin to scavenge air.