Internal-combustion engines – Charge forming device – Multiple carburetors
Patent
1986-10-07
1987-11-10
Cuchlinski, Jr., William A.
Internal-combustion engines
Charge forming device
Multiple carburetors
F02M 2304
Patent
active
047050110
ABSTRACT:
An air intake side secondary air supply system for an internal combustion engine is provided with an open-close valve in an air intake side secondary air supply passage which is provided in addition to an air intake side secondary air supply passage for an air/fuel ratio control. The open-close valve is opened only when an amount of the secondary air through the passage for the air/fuel ratio control is higher than a predetermined level. In addition to the provision of the open-close valve, the opening of an open-close valve or a linear type solenoid valve wich is provided in the secondary air supply passage for controlling the air/fuel ratio is reduced, so that the valve operates in a range where the linearity of the operation of the valve is good. Thus, the accuracy of the air/fuel ratio control is improved especially when the amount of the secondary air is large.
REFERENCES:
patent: 4335699 (1982-06-01), Totsune et al.
patent: 4356797 (1982-11-01), Matsui
patent: 4579099 (1986-04-01), Kishida et al.
patent: 4580541 (1986-04-01), Koumura
patent: 4586481 (1986-05-01), Kishida et al.
Asakura Masahiko
Fukuzawa Takeshi
Hibino Yoshitaka
Sato Hiromitsu
Cuchlinski Jr. William A.
Honda Giken Kogyo Kabushiki Kaisha
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