Kenneth J Berkbigler

41698720, Oct 2, 1979

Jun 12, 1978

5/914314

Fred E. Latz - St. Ann MO
Kenneth A. Berkbigler - Fenton MO

ACF Industries, Inc. - New York NY

F02M 110

261 52

A carburetor for an internal combustion engine. A carburetor body has an induction passage for air to be drawn into the engine. A throttle valve is positioned in the induction passage and is movable between an open and a closed position to control the quantity of air drawn into the engine. A staging valve is positioned in the induction passage and is movable between an open and a closed position. The staging valve is closed during engine cranking and is moved to a first open position when the engine starts and toward its fully open position as the engine warms up. The opening movement of the staging valve is limited to a second open position which is less than its fully open position. The limiting of staging valve movement to this second and less than fully open position limits the usable air capacity of the carburetor to less than its maximum capacity. Staging of the carburetor occurs in response to movement of the throttle valve past a predetermined open position and the staging valve is allowed to move freely between its second open position and its fully open position solely in response to the demand for air by the engine.

41772253, Dec 4, 1979

Jun 12, 1978

5/914374

Kenneth A. Berkbigler - Fenton MO

F02M 722

261 50A

A carburetor comprises a carburetor body having an induction passage, a throttle valve positioned in the passage, a fuel circuit through which fuel is drawn from a fuel bowl for mixing with air to form an air-fuel mixture, a fuel metering rod responsive to movement of the throttle valve for varying the quantity of fuel flowing through the fuel circuit, and a staging valve positioned in the induction passage and movable between an open and a closed position, the staging valve functioning as a choke valve during engine cranking and warm-up and as an air valve during other engine operating conditions. The fuel metering rod is positioned relative to an inlet to the fuel circuit in response to opening and closing movements of the staging valve, when it functions as an air valve, to control the quantity of fuel flowing through the fuel circuit as demand for air by the engine increases or decreases. This control of the fuel metering rod is independent of the control thereof by the throttle valve.

41928342, Mar 11, 1980

Jun 12, 1978

5/914324

Kenneth A. Berkbigler - Fenton MO

ACF Industries, Incorporated - New York NY

F02M 722

261 52

A carburetor for an internal combustion engine. A carburetor body has an induction passage for air to be drawn into the engine. A throttle valve is positioned in the induction passage and is movable between an open and a closed position to control the quantity of air drawn into the engine. A staging valve is positioned in the induction passage and is movable between an open and a closed position. The staging valve is closed during engine cranking and is moved to a first open position when the engine starts and toward its fully open position as the engine warms up. The opening movement of the staging valve is limited to a second open position which is less than its fully open position. The limiting of staging valve movement to this second and less than fully open position limits the usable air capacity of the carburetor to less than its maximum capacity. Staging of the carburetor occurs in response to movement of the throttle valve past a predetermined open position and the staging valve is allowed to move freely between its second open position and a more fully open position solely in response to the demand for air by the engine.