Appeal No. 2003-0405 Page 7
Application No. 09/635,183
regenerative braking is removed and full braking of the front wheel is handled by the
friction braking system under anti-lock braking control. Kidston teaches (column 1, lines
50-52) that "[p]referably, the regenerative braking is not immediately removed but is
ramped down to preserve smoothness in the braking."
Figure 1 of Kidston is a schematic diagram of an electric vehicle according to his
invention. The electric vehicle comprises an electric motor propulsion system 11, a
brake system 15 and a control unit 13. Electric motor propulsion system 11 includes a
battery pack 10, an inverter 12 (for use with AC motors), an accelerator pedal 20 and
an electric motor and drive train 18. Brake system 15 includes a brake pedal 70, a
hydraulic braking system 17 and electric drum brakes 48 and 50. Control unit 13
includes a motor control 22 for controlling propulsion system 11 and a brake control 66
for controlling brake system 15.
In Kidston's propulsion system 11, battery pack 10 supplies power to the vehicle
systems; and power inverter 12 responds to motor control 22 in controlling electric
motor 18. Motor 18 provides drive force to vehicle drive wheels 24 and 26 and further
provides regenerative braking, when commanded, by generating power and coupling
the generated power to battery pack 10, thereby providing braking torque to wheels 24
and 26. Accelerator pedal 20 provides an accelerator command to motor control 22,
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Last modified: November 3, 2007