Clutch parameters
AssigneeSchaeffler Technologies AG & Co. KG
InventorErhard Hodrus
Life of this patent
Estimating the term…
Abstract
A method of determining clutch parameters at the initial start of operation of a friction clutch in a motor vehicle comprising the steps of: in a first phase, moving the clutch from an open state into a closed state and into an open state again at a predetermined constant slip of the clutch and determining and storing the position of the clutch during the movement when predetermined clutch torque thresholds are reached; in a second phase, in a first step, determining a touch point, a position hysteresis, and a torque hysteresis from the determined positions; determining a preliminary friction coefficient; determining preliminary form factors; determining a final friction coefficient; and determining final form factors.
Claims12
A method of determining clutch parameters at the initial start of operation of a friction clutch in a motor vehicle comprising the steps of:
- in a first phase, moving the clutch from an open state into a closed state and into an open state again at a predetermined constant slip of the clutch and determining and storing the position of the clutch during the movement when predetermined clutch torque thresholds are reached;
- in a second phase, in a first step, determining a touch point, a position hysteresis, and a torque hysteresis from the determined positions;
- determining a preliminary friction coefficient;
- determining preliminary form factors;
- determining a final friction coefficient;
- and,
- determining final form factors.
A device including a control device for determining clutch parameters at an initial start of operation of a friction clutch in a motor vehicle, the control device arranged to:
- in a first phase, move the clutch from an open state to a closed state and back to an open state at a predetermined, constant slip of the clutch when a torque is transmitted and, during the movement, to determine and store the position of the clutch when a predetermined clutch torque threshold is reached;
- in a second phase, determine a touch point, a position hysteresis, and a torque hysteresis from the determined positions;
- determine a preliminary friction coefficient;
- determine preliminary form factors;
- determine a final friction coefficient;
- and
- determine final form factors.
Dependencies are inferred from the claim text.