Internal-combustion engines – Charge forming device – Auxiliary air or oxygen added to combustible mixture
Patent
1990-03-16
1991-08-27
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Auxiliary air or oxygen added to combustible mixture
123339, 1375992, F02M 2300
Patent
active
050424483
ABSTRACT:
A valve assembly of novel configuration is associated with the main air induction passage of a fuel-injected, spark-ignited, automotive internal combustion engine for the purpose of regulating the idle air flow. The valve assembly has an inlet connected upstream of the throttle and an outlet connected downstream of the throttle. A pintle controls the restriction that the valve assembly imposes on the idle air flow. The valve assembly is controlled by the engine computer selectively energizing a solenoid on the assembly. In one embodiment the solenoid armature controls flow through another flow path of the valve assembly that parallels the idle air flow path. A movable internal wall divides the valve assembly's body into two variable volume chambers. One chamber forms part of the idle air bypass while the other forms part of the parallel flow path. The one chamber is essentially at manifold vacuum while the other is regulated by a bleed valve and two orifices in the parallel flow path. Positioning of the movable wall positions the pintle. In a second embodiment, one chamber is communicated with the idle air flow path by an orifice, and the other is communicated with the idle air flow path by constructing the pintle from a hollow tube containing the two orifices and placing the bleed valve external to the tube for direct action with one of the orifices.
REFERENCES:
patent: 1126385 (1915-01-01), Burns
patent: 4297984 (1981-11-01), Kawabata
patent: 4353338 (1982-10-01), Wakeman
patent: 4387682 (1983-06-01), Miyagi et al.
patent: 4453700 (1984-06-01), Otsuki et al.
patent: 4823750 (1989-04-01), Niida et al.
Cook John E.
Mitchell Ronald F.
Boller George L.
Dolinar Andrew M.
Macy M.
Siemens Automotive Limited
Wells Russel C.
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