Bicycle shift control apparatus with preferential shifting
First Claim
Patent Images
1. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
- a travel condition sensing unit; and
a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on a first travel condition;
wherein the control unit operates the other one of the front transmission or the rear transmission in priority to the one of the front transmission or the rear transmission based on a second travel condition.
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Accused Products
Abstract
A shift control apparatus is provided for a bicycle that has a front transmission and a rear transmission, wherein each transmission has a plurality of gear steps. The apparatus comprises a travel condition sensing unit and a control unit that operates one of the front transmission and the rear transmission in priority to the other one of the front transmission and the rear transmission based on the travel condition.
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Citations
22 Claims
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1. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
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a travel condition sensing unit; and a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on a first travel condition; wherein the control unit operates the other one of the front transmission or the rear transmission in priority to the one of the front transmission or the rear transmission based on a second travel condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
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a travel condition sensing unit; and a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on the travel condition; wherein the control unit operates the one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission when there is a high rate of change of the travel condition. - View Dependent Claims (9, 10)
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11. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
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a travel condition sensing unit; and a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on the travel condition; wherein the control unit normally sequentially shifts the rear transmission through its plurality of gear steps in response to a first travel condition, and wherein the control unit shifts the front transmission in priority to the rear transmission in response to a second travel condition that is different from the first travel condition. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
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a travel condition sensing unit; and a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on the travel condition; wherein the control unit compares the travel condition to an upshift value to determine the one of the front transmission or the rear transmission to upshift; and wherein the control unit compares the travel condition to an upshift value for at least two gear steps above a current gear step to determine the one of the front transmission or the rear transmission to upshift. - View Dependent Claims (18, 19)
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20. An automatic shift control apparatus for a bicycle that has a front transmission and a rear transmission, each transmission having a plurality of gear steps, wherein the apparatus comprises:
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a travel condition sensing unit; and a control unit that operates one of the front transmission or the rear transmission in priority to the other one of the front transmission or the rear transmission based on the travel condition; wherein the control unit compares the travel condition to a downshift value to determine the one of the front transmission or the rear transmission to upshift; and wherein the control unit compares the travel condition to a downshift value for at least two gear steps below a current gear step to determine the one of the front transmission or the rear transmission to downshift. - View Dependent Claims (21, 22)
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Specification