| 摘要 |
PROBLEM TO BE SOLVED: To see that a regenerative brake torque limiting value does not change suddenly even when the velocity of a vehicle changes with the step increase or step return of a brake pedal during limitation of maximum regenerative torque. SOLUTION: This cooperation controller limits the regenerative braking torque limiting value Tmfin from Tmmax to Tmlmt(i) from the time t1 when the first critical regenerative torque Tmlmt(i) geared to the velocity (middle deceleration) of the vehicle falls under tolerable maximum regenerative braking torque Tmmax. If there is step increase of the brake pedal on and after the limitation starting time t1 (during limitation of maximum regenerative braking torque) of such maximum regenerative braking torque (t2), the first critical regenerative braking torque Tmlmt(i) drops suddenly as shown by D4 with the change of the deceleration of the vehicle accompanying it, and it causes temporary ripple of braking force with the response delay of actual hydraulic brake torque behind the command of hydraulic brake torque raised to assist the drop. Therefore, this controller stores the deceleration of the vehicle at the instant t1 in advance, and gets the second critical regenerative braking torque Tmlmt(b) as shown by D3, using the stored value of the deceleration of the vehicle on and after the instant t2, and sets it to the regenerative torque limiting value Tmfin. COPYRIGHT: (C)2006,JPO&NCIPI
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