Arrangement and method for determining the transmission ratio of a continuously variable belt transmission
AssigneeRobert Bosch GmbH
InventorJoachim Luh
Life of this patent
Estimating the term…
Abstract
The invention relates to an arrangement and a method for determining the transmission ratio of a continuously variable transmission having a drive end and an output end. A signal, which represents the transmission ratio, is computed in dependence upon a primary rpm of the drive end and a secondary rpm of the output end which are transmitted to the arrangement. A fault signal is generated which is dependent upon the instantaneous primary rpm and/or the instantaneous secondary rpm and indicates whether a value for the transmission ratio is to be outputted as the signal representing the transmission ratio. This value is computed from the detected instantaneous values for the primary rpm and the secondary rpm.
Claims18
An arrangement for determining the transmission ratio of a continuously variable belt transmission having a drive end and an output end, the arrangement comprising:
- first sensor means for detecting the primary rpm (Np) at said drive end and supplying said primary rpm (Np) to said arrangement;
- second sensor means for detecting the secondary rpm (Ns) at said output end and supplying said secondary rpm (Ns) to said arrangement;
- computing means (200) for computing a signal (i*) in dependence upon said primary rpm (Np) and said secondary rpm (Ns) with said signal (i*) representing said transmission ratio;
- and,
- checking means for generating a fault signal (fi) dependent upon at least one of said primary rpm (Np) and said secondary rpm (Ns) with said fault signal (fi) indicating whether a value (i) for said transmission ratio, which is computed from the detected instantaneous values of said primary rpm (Np) and said secondary rpm (Ns), is to be outputted as said signal (i*).
A method for determining the transmission ratio of a continuously variable transmission having a drive end and an output end, the method comprising the steps of:
- computing a signal (i*) representing said transmission ratio in dependence upon a primary rpm (Np) of said drive end and a secondary rpm (Ns) of said output end;
- and,
- generating a fault signal (fi) dependent upon at least one of the instantaneous primary rpm (Np) and the instantaneous secondary rpm (Ns) with said fault signal (fi) indicating whether a value (i) for said transmission ratio, which is computed from the detected instantaneous values of said primary rpm (Np) and said secondary rpm (Ns), is to be outputted as said signal (i*).
A control circuit for adjusting the transmission ratio of a continuously variable belt transmission having a drive end and an output end, the control circuit comprising:
- first sensor means for detecting the primary rpm (Np) at said drive end and supplying said primary rpm (Np) to said arrangement;
- second sensor means for detecting the secondary rpm (Ns) and supplying said secondary rpm (Ns) to said arrangement;
- computing means (200) for computing a signal (i*) in dependence upon said primary rpm (Np) and said secondary rpm (Ns) with said signal (i*) representing said transmission ratio;
- and,
- checking means for generating a fault signal (fi) dependent upon at least one of said primary rpm (Np) and said secondary rpm (Ns) with said fault signal (fi) indicating whether a value (i) for said transmission ratio, which is computed from the detected instantaneous values of said primary rpm (Np) and said secondary rpm (Ns), is to be outputted as said signal (i*).
A control circuit for adjusting the tension of a continuously variable belt transmission having a drive end and an output end, the control circuit comprising:
- first sensor means for detecting the primary rpm (Np) at said drive end and supplying said primary rpm (Np) to said arrangement;
- second sensor means for detecting the secondary rpm (Ns) and supplying said secondary rpm (Ns) to said arrangement;
- computing means (200) for computing a signal (i*) in dependence upon said primary rpm (Np) and said secondary rpm (Ns) with said signal (i*) representing said transmission ratio;
- and,
- checking means for generating a fault signal (fi) dependent upon at least one of said primary rpm (Np) and said secondary rpm (Ns) with said fault signal (fi) indicating whether a value (i) for said transmission ratio, which is computed from the detected instantaneous values of said primary rpm (Np) and said secondary rpm (Ns), is to be outputted as said signal (i*).
Dependencies are inferred from the claim text.