Transmission element having a segmented characteristics map
AssigneeRobert Bosch GmbH
InventorsMichael Eichler, Matthias Beckert
Life of this patent
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Abstract
A transmission element having at least one input and at least one output is described, the transmission element delivering a functional relationship (t=F(R)) between the input quantity (R) applied to the input and the output quantity (t) that may be picked up at the output and the functional relationship (t=F(R)) being stored in a characteristics map, wherein the characteristics map comprises at least one segment having a lower limit (N(bi)) and an upper limit (N(b(i+1)), a function value (t_(i)=F(N(b_i))) being assigned to the lower limit (N(bi)) and a function value (t(i+1)=F(N(b(i+1))) being assigned to the upper limit (N(bi+1)), and the output quantity (t) being interpolated between the lower limit and the upper limit.
Claims20
A non-transitory transmission element, comprising:
- at least one input and at least one output, the transmission element delivering a functional relationship between an input quantity applied to the input and an output quantity that can be picked up at the output, the functional relationship being stored in a characteristics map;
- wherein the characteristics map includes a plurality of segments each having a lower limit, an upper limit, a starting value, an end value, and a slope value, a first function value being assigned to the lower limit and a second function value being assigned to the upper limit,
- wherein the transmission element includes a delta-sigma converter having a quantizer and an integrator, a digitized input quantity appearing at an output of the integrator, and
- wherein the transmission element is adapted to use the digitized input quantity to select one of the segments from the characteristics map, and a particular starting value, end value, slope, the quantizer output becoming effective for computing a manipulated variable in such a way that the output quantity is interpolated between the lower limit and the upper limit of the selected segment.
A method for operating a transmission element having at least one input and at least one output, the method comprising:
- delivering, by the transmission element, a functional relationship between an input quantity applied to the input and an output quantity that may be picked up at the output, the functional relationship being stored in a characteristics map, the characteristics map comprising a plurality of segments each having a lower limit, an upper limit, a starting value, an end value, and a slope value, a first function value being assigned to the lower limit and a second function value being assigned to the upper limit;
- wherein the transmission element includes a delta-sigma converter having a quantizer and an integrator, a digitized input quantity appearing at the output of the integrator, and wherein using the digitized input quantity, a segment is selected from the characteristics map, and a particular starting value, end value, slope, the quantizer output become effective for computing a manipulated variable in such a way that the output quantity is interpolated between the lower limit and the upper limit of the selected segment.
Dependencies are inferred from the claim text.