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:
Dec. 30, 2003
Filed:
Jul. 12, 2002
Bo Carlsson, Floda, SE;
Hans Ström, Kode, SE;
Aktiebolaget Electrolux, Stockholm, SE;
Abstract
Crankcase scavenged two-stroke internal combustion engine, in which at least one piston ported air passage, with length L , is arranged between an air inlet ( ) and each scavenging port ( ′) of a number of transfer ducts ( ′), with length L , from the scavenging port to the crankcase. The air passage is arranged from an air inlet ( ) equipped with a restriction valve ( ), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct ( ′) to at least one connecting port ( ′) in the engine's cylinder wall ( ). The connecting port ( ′) is arranged so that it in connection with piston positions at the top dead center is connected with flow paths ( ′) embodied in the piston ( ), which extend to the upper part of a number of transfer ducts ( ′). Each flow path of the piston is arranged so that the air supply is given an essentially equally long period, counted as crank angle or time, as the engine's inlet ( ), and the length of the inlet into which fuel is added, Li, is greater than 0.6 times the total length of the piston ported air passage L and the length of the transfer duct L , i.e. 0.6×(L +L ) but smaller than 1.4 times the same length, i.e. 1.4×(L +L ).