Control valve for the working pressure of an automatic change-speed gear
AssigneeDaimler-Benz Aktiengesellschaft
InventorArwed VON Koch
Life of this patent
Estimating the term…
Abstract
A control valve for the working pressure or for another pressure in an automatic transmission for vehicles, especially motor vehicles, in which a higher pressure fed in a throttled manner, possibly effective as pre-control pressure of a slide valve, is controlled in the manner of an excess pressure valve; the valve body of this control valve which is constructed as solenoid valve is acted upon by a control magnitude dependent on torque; the armature of the solenoid valve acts in the de-energized condition on the valve closure body with a predetermined force whereby this force is variable upon energization of the coil as a function of torque of the driving engine.
Claims28
A control valve arrangement for controlling the pressure of a pressure medium in an automatic transmission for vehicles having a driving engine, the arrangement comprising:
- control valve means constructed as a solenoid valve means including a ring-shaped armature means, a valve closure body means, said ring-shaped armature means being operatively connected with said valve closure body means and applying a predetermined force on said valve closure body means in a de-energized condition of the solenoid valve means a constant width annular magnetic gap means for accommodating said ring-shaped armature means upon an energization of the solenoid valve means, and means for energizing said solenoid valve means in dependence upon the torque of the driving engine such that said ring-shaped armature means is drawn into said constant width annular magnetic gap means by a predetermined amount so as to change the predetermined force acting upon said valve closure body means to that the pressure of the pressure medium is correlated with the torque of the driving engine.
A control valve for controlling the pressure of a pressure medium in an automatic transmission for vehicles, in which a higher pressure fed in a throttled manner is controlled in the manner of an excess pressure valve whose valve body is acted upon by a control magnitude dependent on torque, characterized in that the control valve is constructed as solenoid valve which includes a ring-shaped armature means, a valve closure body means acted upon by the ring-shaped armature means with a predetermined force in a de-energized condition of the solenoid valve, a constant width annular magnetic gap means for accommodating said ring-shaped armature means upon an energization of the solenoid valve, and means for energizing the solenoid valve in dependence of the torque of the driving engine such that said ring-shaped armature means is drawn into said constant width annular magnetic gap means by a predetermined amount so as to change the predetermined force acting upon said valve closure body means so that the pressure of the pressure medium is correlated with the torque of the driving engine.
A control valve arrangement for controlling the pressure of a pressure medium in an automatic transmission for vehicles having a driving engine, the arrangement comprising:
- control valve means constructed as a solenoid valve means including an armature means and a valve closure body means, said armature means being operatively connected with said valve closure body means and applying a predetermined force on said valve closure body means in the de-energized condition of the solenoid valve means, and means for changing said force upon energization of said solenoid valve means in dependence upon the torque of the driving engine, said solenoid valve means further includes an energizing coil constructed as a ring coil, a tubularly shaped coil carrier body means for carrying said ring coil, said coil carrier body means forming axially at one end thereof an annular magnetic gap by means of two pole shoe means disposed concentrically about one another, said armature means being adapted to be pulled more or less into said annular gap.
A control valve arrangement for controlling the pressure of a pressure medium in an automatic transmission for vehicles having a driving engine, the pressure medium being fed in a throttled manner and being controlled in the manner of an excess pressure valve, the pressure valve having a valve body acted upon by a control magnitude dependent on the torque of the driving engine, the arrangement comprising:
- a valve housing means, control valve means disposed in said valve housing means and constructed as a solenoid valve means including an armature means and a valve closure body means, said armature means being operatively connected with said valve closure body means and applying a predetermined force on said valve closure body means in the de-energized condition of the solenoid valve means and wherein means are provided for changing said force upon energization of said solenoid valve means in dependence upon the torque of the driving engine, said solenoid valve means further including an energizing coil constructed as a ring coil, a tubular shaped coil body means for carrying said ring coil, said coil carrier body means forming axially at one end thereof an annular magnetic gap by means of two pole shoe means disposed concentrically about one another, said armature means being adapted to be pulled more or less into said annular gap, a rod extending centrally through the coil carrier body means, said armature means being fixedly mounted at one end of said rod, a spring and abutment means for said spring, said abutment means being disposed on the opposite end of said rod, said armature means, said rod, and said abutment means being retained and centered in a suspended and frictionless manner in at least one of the two parts consisting of the valve housing means and said coil carrier body means, said armature means, said rod and said abutment means being axially displaceable against only slight return forces, said armature means, said rod and said abutment means being retained at both ends by a disc-shaped spring having a low return force which is radially yieldingly inserted at the outer circumference thereof in a respective one of the valve housing means and said coil carrier body means.
A control valve arrangement for controlling the pressure of a pressure medium in an automatic transmission for vehicles having a driving engine, the arrangement comprising:
- control valve means constructed as a solenoid valve means including a coil carrier body means, an armature means and a valve closure body means, said armature means being operatively connected with said valve closure body means and applying a predetermined force on said valve closure body means in a deenergized condition of the solenoid valve means, means for changing said predetermined force upon an energization of said solenoid valve means in dependence upon the torque of the driving engine, a rod extends centrally through the coil carrier body means, said armature means being fixedly mounted at one end of said rod, and a spring and abutment means for said spring are provided, said abutment means being disposed on an opposite end of said rod.
A control valve arrangement for controlling the pressure of a pressure medium in an automatic transmission for vehicles having a driving engine, the pressure medium being fed in a throttled manner and controlled in the manner of an excess pressure valve, the pressure valve having a valve body acted upon by a control magnitude dependent on the torque of the driving engine, the arrangement comprising:
- valve housing means, a control valve means disposed in said valve housing means, said control valve means being constructed as a solenoid valve means including an energizing coil, a coil carrier body means for carrying said energizing coil, an armature means, and a valve closure body means, said armature means being operatively connected with said valve closure body means and applying a predetermined force on said valve closure body means in the de-energized condition of the solenoid valve means, and wherein means are provided for changing said force upon energization of said solenoid valve means in dependence upon the torque of the driving engine, a rod extending centrally through said coil carrier body means, said armature means being fixedly mounted at one end of said rod, a spring and abutment means for said spring being disposed on the opposite end of said rod, said armature means, said rod, and said abutment means being retained and centered in a suspended and frictionless manner in at least one of the two parts consisting of the valve housing means and said coil carrier body means, said armature means, said rod and said abutment means being axially displaceable against only slight return forces, said armature means, said rod and said abutment means being retained at both ends by a disk-shaped spring having a low return force which is radially yieldingly inserted at the outer circumference thereof in a respective one of the valve housing and said coil carrier body means.
Dependencies are inferred from the claim text.