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US 4,561,408 AGranted
Motorized flow control valve
AssigneeBorg-Warner Corporation
InventorPatrick A. Jenkins
Life of this patent
Estimating the term…
Abstract
The invention teaches the use of a cam-operated valve control means, which cam is moved by an electrical motor in response to an operating signal. Such valve control means finds particular application in an exhaust gas recirculation system or idle speed control for an automobile engine.
Claims8
A valve control system for an exhaust gas recirculation system comprising:
- a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore;
- drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor;
- a cam operator connected for operation by said drive shaft;
- a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber,
- said discharge port communicating with said discharge chamber,
- said inlet port communicating with said inlet chamber,
- said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers;
- a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator;
- a keeper plate mounted on said stem between said cam operator and said housing wall;
- and
- a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
8 more elements
A valve control system for an exhaust gas recirculation system comprising:
- a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore;
- drive means, including a stepper motor having a drive shaft extending therefrom and operable by said stepper motor;
- a cam operator connected for operation by said drive shaft;
- a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber,
- said discharge port communicating with said discharge chamber,
- said inlet port communicating with said inlet chamber,
- said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers;
- a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator;
- a keeper plate mounted on said stem between said cam operator and said housing wall;
- and
- a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
8 more elements
A valve control system for an exhaust gas recirculation system comprising:
- a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface and a stem bore with a seal means positioned in said stem bore;
- drive means, including a direct current motor having a drive shaft extending therefrom and operable by said direct current motor;
- a cam operator connected for operation by said drive shaft;
- a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber;
- said discharge port communicating with said discharge chamber;
- said inlet port communicating with said inlet chamber;
- said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers;
- a valve positioned in said discharge chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator;
- a keeper plate mounted on said stem between said cam operator and said housng wall;
- and
- a bias spring between said keeper plate and housing top surface to urge said valve into contact with said valve seat to seal said separator bore.
8 more elements
A valve control system for an exhaust gas recirculation system comprising:
- a valve assembly having a housing with a wall which defines a cavity, an inlet port, a discharge port, a top surface, and a stem bore with a seal means positioned in said stem bore;
- drive means, including a direct current motor, having a drive shaft extending therefrom and operable by said direct current motor;
- a cam operator connected for operation by said drive shaft;
- a separator mounted in said cavity and cooperating with said wall to define a discharge chamber and an inlet chamber;
- said discharge port communicating with said discharge chamber;
- said inlet port communicating with said inlet chamber;
- said separator also defining a valve seat and a separator bore communicating between said discharge and inlet chambers;
- a valve positioned in said inlet chamber and operable to seal said separator bore, said valve having a stem extending through said stem bore seal means to contact said cam operator;
- a keeper plate mounted on said stem between said cam operator and said housing wall;
- and
- a bias spring between said keeper plate and housing top surface to urge said valve out of contact with said valve seat to open said separator bore.
8 more elements
Dependencies are inferred from the claim text.