Air-to-fuel ratio adjusting system for an internal combustion engine

Patent · Tue Oct 11 04:00:00 EDT 1977

OSTI ID:5349616

Hattori, T; Takada, S; Sugi, F; Nakase, T

A carburetor for applying air-fuel mixture to an internal combustion engine includes a main passage for applying air-fuel mixture and principally controlling the amount thereof. The air-to-fuel ratio of the air-fuel mixture to be supplied to the engine is detected by an air-to-fuel ratio detector mounted in an exhaust pipe of the engine, and when the detected ratio is lower than a stoichiometrically optimum air-to-fuel ratio for perfect combustion of the air-fuel mixture, additional air is supplied to the main passage through a bypass passage, the amount of which is controlled by a bypass valve mounted in the bypass passage. An intake air pressure detecting device is mounted in an intake pipe of the engine, and when the detected pressure (absolute pressure) in the intake pipe becomes higher additional fuel is supplied to the main passage through an auxiliary fuel jet provided in the carburetor.

• Assignee: Nippon Soken, Inc.
• Patent Number(s): US 4052968
• OSTI ID: 5349616
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330603* -- Vehicle Design Factors-- Engine System
330700 -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION ABATEMENT
CONTROL EQUIPMENT
DESIGN
ELECTRONIC CIRCUITS
ENGINES
EXHAUST GASES
FLOW REGULATORS
FUEL ECONOMY
FUEL SYSTEMS
FUEL-AIR RATIO
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
POLLUTION ABATEMENT
VALVES
WASTES