Carburetor deceleration emission control
A carburetor is described having separate primary and secondary air/fuel mixture induction passages each connected at one end to air at essentially atmospheric pressure and adapted to be connected at its opposite end to an engine intake manifold to be subject to the change in depression therein from a minimum level to a maximum vacuum force level occurring during engine deceleration conditions. A separate throttle valve is mounted for a rotatable movement across each of the passages between an open and closed position to control flow through the passage. One control is connected to the throttle valves to open the valves; the second is connected to the secondary induction passage throttle valve and operable independently of the first during engine deceleration to provide air/fuel mixture flow through the secondary induction passage.
- Assignee:
- Ford Motor Co.
- Patent Number(s):
- US 3957022
- OSTI ID:
- 7180489
- Country of Publication:
- United States
- Language:
- English
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