Air intake side secondary air supply system for an internal combustion engine

Patent · Tue Apr 28 04:00:00 EDT 1987

OSTI ID:6766509

Watabe, A; Tomobe, N; Kobayshi, H

An air intake side secondary air supply system is described for an internal combustion engine having an intake air passage with a carburetor and a throttle valve, comprising: a first secondary air supply passage leading to the intake air passage downstream of the throttle valve; a secondary air supply passage leading to the intake air passage downstream of the throttle valve; air/fuel ratio detection means for detecting an air/fuel ratio of a mixture supplied to the engine from a composition of an exhaust gas of the engine; an open/close valve disposed in the first secondary air supply passage which is operated to open only when the detection means detect a rich air/fuel ratio; an air control valve having a pressure chamber and disposed in the second secondary air supply passage, for varying a sectional area of a flow through the second secondary air supply passage in response to a magnitude of a pressure applied in the pressure chamber.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP
• Patent Number(s): US 4660533
• OSTI ID: 6766509
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
CARBURETORS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
DISPERSIONS
ENGINES
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FLUID FLOW
FLUIDS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
MIXTURES
PRESSURE CONTROL
PRESSURE REGULATORS
VALVES
WASTES