Secondary air supply control system
Patent
·
OSTI ID:5563725
The invention discloses a secondary air supply control system including: an air cleaner; an air pump connected to the air cleaner; a valve having a first chamber and a second chamber, which are separated by a diaphragm and communicated with each other through a first orifice, and controlling the supply of secondary air from the air pump to an exhaust manifold, in response to deflection of the diaphragm; and a passage connecting the second chamber to an intake manifold in a position downstream of a throttle valve in a carburetor and having a second orifice. In addition, a check valve which allows the flow of the secondary air only in the direction towards the exhaust manifold is provided in a passage interconnecting the valve and the exhaust manifold. In this system, an open cross-sectional area of the first orifice is smaller than that of the second orifice provided in the aforesaid passage.
- Assignee:
- Toyota Jidosha Kogyo Kabushiki Kaisha
- Patent Number(s):
- US 4147032
- OSTI ID:
- 5563725
- Country of Publication:
- United States
- Language:
- English
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