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US 5,273,143 AGranted
Arrangement for operating a friction clutch of a motor vehicle, in particular of a truck
AssigneeFichtel & Sachs AG
InventorsReiner Voss, Bernd Gaubitz, Gerhard Gasper, Holger Westendorf
Life of this patent
Estimating the term…
Abstract
For emergency operation of an automatic friction clutch (3) of a truck which is operated during normal running by an electronic controller (9) via an electric motor driven actuator (11) and a hydraulic system (19, 21, 23), it is proposed that the clutch be controlled manually via a compressed air actuator (29), in particular via a compressed air servo actuator, by means of a changeover valve (39) which connects the compressed air actuator (29) alternately to a compressed air source (37) or via a flow throttle (41) to the atmosphere.
Claims17
An arrangement for operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic actuator designed, in particular, as a pneumatic servo actuator for operating said friction clutch;
- an electric motor driven actuator, in particular, for operating said pneumatic servo actuator;
- and
- an electronic controller for said electric motor driven actuator, wherein said pneumatic actuator is designed as a compressed air actuator supplied from a compressed air source, in particular, as a compressed air servo actuator, of which a compressed air inlet is connectable, via a manually controllable pneumatic changeover valve, alternately to one of said compressed air source and to a flow throttle leading to the atmosphere, for emergency running of said friction clutch, wherein said electric motor driven actuator and said compressed air actuator operate separate hydraulic master cylinders of a hydraulic power transmission arrangement of which a hydraulic slave cylinder which is connectable to said clutch is connectable via a manually controllable hydraulic changeover valve alternately to one of said separate hydraulic master cylinders.
1 more element
An arrangement for operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic actuator designed, in particular, as a pneumatic servo actuator for operating said friction clutch;
- an electric motor driven actuator, in particular, for operating said pneumatic servo actuator;
- and
- an electronic controller for said electric motor driven actuator, wherein said pneumatic actuator is designed as a compressed air actuator supplied from a compressed air source, in particular, as a compressed air servo actuator, of which a compressed air inlet is connectable via a manually controllable pneumatic changeover valve, alternately to one of said compressed air source and to a flow throttle leading to the atmosphere, for emergency running of said friction clutch;
- wherein said electric motor driven actuator controls a servo control valve of said compressed air servo actuator, and wherein said compressed air servo actuator is designed such that the pressure in its working chamber, supplied from said compressed air source, is controllable via servo control valve and via said manually controllable pneumatic changeover valve, wherein said manually controllable pneumatic changeover valve is designed as an electrically deblockable valve arrangement.
2 more elements
An arrangement for operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic actuator designed, in particular, as a pneumatic servo actuator for operating said friction clutch;
- an electric motor driven actuator, in particular, for operating said pneumatic servo actuator;
- and
- an electronic controller for said electric motor driven actuator, wherein said pneumatic actuator is designed as a compressed air actuator supplied from a compressed air source, in particular, as a compressed air servo actuator, of which a compressed air inlet is connectable, via a manually controllable pneumatic changeover valve, alternately to one of said compressed air source and to a flow throttle leading to the atmosphere, for emergency running of said friction clutch, wherein said electric motor driven actuator controls a servo control valve of said compressed air servo actuator, and wherein said compressed air servo actuator is designed such that the pressure in its working chamber supplied from said compressed air source, is controllable via said servo control valve and via said manually controllable pneumatic changeover valve wherein, for initiating emergency running, there is provided a manually operable electric switch which, when operated, disables said electronic controller and optionally deblocks an electrically deblockable valve arrangement.
1 more element
An arrangement for operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic actuator, designed, in particular, as a pneumatic servo actuator for operating said friction clutch;
- an electric motor driven actuator, in particular, for operating said pneumatic servo actuator and;
- an electronic controller for said electric motor driven actuator, wherein said pneumatic actuator is designed as a compressed air actuator supplied from a compressed air source, in particular, as a compressed air servo actuator, of which a compressed air inlet is connectable, via a manually controllable pneumatic changeover valve, alternately to one of said compressed air source and to a flow throttle leading to the atmosphere, for emergency running of said friction clutch, wherein, from a pressure side of said hydraulic master cylinder there branches a pressure release line which leads to a balancing tank and into which a valve, which opens on initiation of an emergency running, is connected.
An arrangement operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic actuator, designed, in particular, as a pneumatic servo actuator for operating said friction clutch;
- an electric motor driven actuator, in particular, for operating said pneumatic servo actuator;
- and
- an electronic controller for said electric motor driven actuator, wherein said pneumatic actuator is designed as a compressed air actuator supplied from a compressed air source, in particular, as a compressed air servo actuator, of which a compressed air inlet is connectable, via a manually controllable pneumatic changeover valve, alternately to one of said compressed air source and to a flow throttle leading to the atmosphere, for emergency running of said friction clutch,
- wherein the motor vehicle as a pneumatically changeable gear,
- wherein said gear is allocated a manually operable pneumatic gear changer by means of which compressed air can be supplied selectively to said gear during emergency running for changing at least into the first gear, the reverse gear and into the neutral position, and further wherein said pneumatic gear changer is coupled to an electric switch for initiating emergency running and for disabling said electronic controller.
3 more elements
An arrangement for operating a friction clutch of a motor vehicle, in particular of a truck, comprising:
- a pneumatic servo actuator for operating said clutch;
- an electric motor driven actuator for operating a servo control valve of said servo actuator;
- an electronic controller for said electric motor driven actuator;
- and
- a hydraulic power transmission arrangement with a hydraulic master cylinder and a hydraulic slave cylinder in an operating power path between said electric motor driven actuator and said pneumatic servo actuator wherein said pneumatic servo actuator is designed as a compressed air servo actuator supplied from a compressed air source and further comprising a pressure release line branching from a pressure side of said hydraulic master cylinder, wherein said pressure release line leads to a balancing tank and contains a valve which is controllable via a manually operable service element.
2 more elements
Dependencies are inferred from the claim text.