Control of carburetor-supplied induction system

Patent · Tue May 01 04:00:00 EDT 1984

OSTI ID:6326979

Matsumoto, H

A control for carburetor-supplied induction systems for internal combustion engines. The engine includes a carburetor and a principal induction passage leading to an intake valve and thence to a combustion chamber. A principal throttle in the carburetor controls the supply of air/fuel mixture to the principal induction passage as a function of throttle setting and engine demand. This invention includes an auxiliary throttle valve in the principal induction passage between the principal throttle and the intake valve, and an auxiliary induction passage extending from a point in the principal induction passage between the two throttles to a point adjacent to the intake valve where its discharge will, when the intake valve is open, enter the combustion chamber in such a way as to cause swirl and/or turbulence. The auxiliary throttle is closed at light loads so that the bulk of the intake charge is delivered to the combustion chamber through the auxiliary induction passage. The invention contemplates the use of one carburetor for more than one cylinder, and also a number of carburetors equal in number to the number of the cylinders.

• Assignee: Yamaha Hatsumoto Kabushiki Kaisha (Japan)
• Patent Number(s): US 4445473
• OSTI ID: 6326979
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CARBURETORS
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
CYLINDERS
DESIGN
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
TURBULENT FLOW
VALVES
VORTEX FLOW