Patent ID: 7857881

Claim:
An air cleaner for a two-stroke internal combustion engine in which a carburetor composes a part of an intake system of the engine and defines an air-fuel mixture passage for preparing air-fuel mixture and a fresh air passage permitting fuel-free fresh air for use in stratified scavenging to pass through, such that the air cleaner supplies the air-fuel mixture passage and the fresh air passage of the carburetor with air cleaned by an air cleaner element, said air cleaner comprising: an air cleaner base including an air-fuel mixture opening communicating with the air-fuel mixture passage of the carburetor and a fresh air opening communicating with the fresh air passage of the carburetor, and detachably attached to a component of the intake system; and an air guide member provided at the air-fuel mixture opening of the air cleaner base, wherein the air guide member is configured to curve near the air-fuel mixture opening and extend from there along the air cleaner base, and has a cross section surrounded by a peripheral wall, and wherein the air guide member defines a first clean air intake for introducing the cleaned air into the air guide member and defines a mixture-use air extension passage extending between the first clean air intake thereof and the air-fuel mixture opening of the air cleaner base.