REGENERATIVE BRAKE METHOD AND SYSTEM
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United States of America Patent
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Issued Date -
Oct 13, 2016
app pub date -
Mar 26, 2014
filing date -
May 2, 2012
priority date (Note) -
Abandoned
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Abstract
A vehicle 100 (FIG. 1) includes a braking system 100a (FIG. 2) that includes a foundation braking system 111 and a hydraulic braking system 112. According to method 100b (FIGS. 3 and 4), system controller 117 (FIG. 2) at successive steps 120-127 determines when hydraulic regenerative braking system 112 cannot provide full commanded braking torque and acts through proportional treadle valve 116a to provide a proportional transition between an isolated hydraulic braking mode and an isolated foundation braking mode. According to methods 200b (FIGS. 7-8) and 200b (FIGS. 9-10), proportional braking is approximated. According to method 300 (FIG. 11), hydraulic braking is reduced at the initiation of a braking event based upon the estimated kinetic energy of the vehicle and available capacity for storing that energy.
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