Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Solenoid self-cleaning pressure valve for automatic vehicle transmission










Image Number 2 for United States Patent #5971889.

A system for controlling an automatic vehicle transmission, including a gear system and hydraulic clutches which hold a member of the gear system stationary to produce gear reduction or reverse, having an oil line which connects the clutches to an oil pressure source, a pressure control valve having a solenoid provided in the oil line which generates a regulated oil pressure to be supplied to the clutches in response to a current supplied to the solenoid, a switch valve provided in the oil line which switches the oil pressure to be supplied to the one of the clutches between the regulated oil pressure and a line pressure. In the system, it is discriminated whether the pressure control valve does not supply the regulated oil pressure to the clutches and if so, a dither current is supplied to the solenoid such that the valve repeatedly performs a vibrational motion to remove any grit therefrom, thereby removing grit without causing gear-shift shock or clutch vibration.








 
 
  Recently Added Patents
Stock analysis method, computer program product, and computer-readable recording medium
Illumination unit for a direct-view display
Substituted indolo 4,3 FG quinolines useful for treating migraine
Charge domain filter and method thereof
System and method for efficient association of a power outlet and device
Solid-state imaging device and electronic apparatus with antireflection structure
Multi-user remote health monitoring system with biometrics support
  Randomly Featured Patents
Numerical control unit for controlling a machine tool to machine a workpiece at an instructed feed rate along linear and rotational axes
Method for setting a R-P link in mobile communication system
Wrist watch case
Snap swivel assembly including bearing for fishing line
Assembly for mounting and removing a hub from a shaft
Protective self-aligned buffer layers for damascene interconnects
Electrolytic recovery of copper from waste water
Shears sheath
Vertical conformance steam drive oil recovery method
Muffler for air-powered nailers and the like