Air intake side secondary air supply system for an internal combustion engine with an improved operation for a large amount of the secondary air

Patent · Tue Nov 10 04:00:00 EST 1987

OSTI ID:5684419

Hibino, Y; Fukuzawa, T; Sato, H; Asakura, M

An air intake side secondary air supply system for an internal combustion engine having an intake air passage with a carburetor and an exhaust gas passage is described comprising: a first air intake side secondary air supply passage leading to the intake air passage, downstream of a throttle valve of the carburetor; a second air intake side secondary air supply passage also leading to the intake air passage, downstream of the throttle valve of the carburetor; a first open-close valve disposed in the first air intake side secondary air supply passage; an oxygen concentration sensor disposed in the exhaust passage and producing an output signal; a second open-close valve disposed in the second air intake side secondary air supply passage; and duty control means responsive to the output signal of the oxygen concentration sensor and connected to the first and second open-close valves.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4705011
• OSTI ID: 5684419
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
CARBURETORS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
VALVES