Transmission throttle valve modulator responsive to both positive manifold pressure and negative manifold pressure

Patent · Tue Sep 23 04:00:00 EDT 1986

OSTI ID:5041761

Greene, T L

This patent describes a throttle valve actuator for an automatic transmission used with an internal combustion engine having an air-fuel intake manifold and having means on the air intake side thereof for supercharging the effective pressure therein; an actuator housing, a diaphragm in the housing cooperating with the housing to define a cavity on one side of the diaphragm, means for establishing pneumatic communication between the intake manifold and the cavity, spring means in the cavity for urging the diaphragm in one direction, the effective force on the diaphragm being the sum of the force of the spring and the pneumatic force of the pressure of the manifold; a seal ring situated in the housing and on the opposite side of the diaphragm and having a central opening of less area than the total area of the diaphragm, the central portion of the diaphragm being received over the opening; a valve stem adapted to establish a mechanical connection between the central diaphragm portion and a transmission throttle valve whereby the throttle valve is subjected to an actuating force that is the sum of the effective for of the pneumatic pressure on the diaphragm and the spring force; the opposite side of the diaphragm being adapted to establish a seal on the seal ring whereby the effective area over which a positive pressure in the manifold acts is equal to the area of the opening in the seal ring and wherein effective area of the diaphragm over which a negative pressure on the manifold acts is the total area of the diaphragm.

• Assignee: Ford Motor Co., Dearborn, MI
• Patent Number(s): US 4612826
• OSTI ID: 5041761
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
ACTUATORS
COMPRESSORS
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FUEL-AIR RATIO
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MECHANICAL STRUCTURES
MECHANICAL TRANSMISSIONS
MECHANICS
PNEUMATICS
PRESSURE CONTROL
RINGS
SEALS
SUPERCHARGERS
VALVES
VEHICLES