Patent ID: 7104253
Filing Date: 2006-09-12
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A carburetor, including: a scavenging air passage and a fuel and air mixing passage; a throttle valve disposed in communication with the fuel and air mixing passage and movable between an idle position at least substantially restricting fluid flow through the fuel and air mixing passage and an open position permitting an at least somewhat less restricted fluid flow therethrough; an air valve disposed in communication with the scavenging air passage and movable between closed and open positions to control air flow through the scavenging air passage; a lost motion coupler operably associated with the valves, movable over a limited range relative to the air valve, and movable with the air valve outside of the limited range; and a flexible cord operably connecting the throttle valve and air valve through the lost motion coupler to drive the opening of the air valve in response to movement of the throttle valve toward its open position, wherein the air valve is closed when the throttle valve is in its idle position, when the throttle valve is moved a limited amount away from its idle position toward a partially open off idle position the cord drives the lost motion coupler and in said limited range the air valve remains closed, and further movement of the throttle valve away from its off idle position drives the lost motion coupler which moves the air valve from its closed position toward its open position.