Title:
CONTROL APPARATUS FOR PREVENTING ROLLING BACK OF ELECTRICALLY DRIVEN VEHICLE UPON START-UP THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/063564
Kind Code:
A1
Abstract:
After a momentary period of time has elapsed (t1) from a stopped state with the gear in D-range, wherein charging is limited, and upon conducting a start-up operation (motor torque command value (TTMA) = TTMA0 at the beginning) wherein an accelerator opening (APO) (target motor torque basic value: TTMA0) is increased as indicated in the drawing, rolling-back prevention control is started (flag_RSAON = 1) when vehicle speed (VSP) ≤ -0.5km/h has continued for 0.1 second (t2) (evaluated as roll-back). That is, on the one hand, TTMA is decreased with a prescribed rate of change (β1) to make the value thereof become zero at t3, and on the other hand, a brake torque command value (TTBRK) (brake fluid pressure command value (TPMC)) for preventing rolling-back upon start-up is increased with a prescribed rate of change (α1) to make the value thereof become the same torque value as TTMA0, to prevent the Rolling Back by friction braking instead of regeneration braking. When VSP = 0 has continued for 0.1 sec due to this control, to reach a Rolling-back Prevention Completion time (t5), TTMA is returned to TTMA0 with a prescribed rate of change (β2), and TTBRK (TPMC) is decreased to zero with a prescribed rate of change (α2 = -β2).
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Inventors:
KAZAMA ISAMU (JP)
NAKAZAWA SHINSUKE (JP)
YOSHIMURA FUTOSHI (JP)
NAKAZAWA SHINSUKE (JP)
YOSHIMURA FUTOSHI (JP)
Application Number:
PCT/JP2011/071837
Publication Date:
May 18, 2012
Filing Date:
September 26, 2011
Export Citation:
Assignee:
NISSAN MOTOR (JP)
KAZAMA ISAMU (JP)
NAKAZAWA SHINSUKE (JP)
YOSHIMURA FUTOSHI (JP)
KAZAMA ISAMU (JP)
NAKAZAWA SHINSUKE (JP)
YOSHIMURA FUTOSHI (JP)
International Classes:
B60L7/24; B60T7/12; B60T8/17
Foreign References:
| JP2008193772A | 2008-08-21 | |||
| JP2000270404A | 2000-09-29 | |||
| JP2009162291A | 2009-07-23 | |||
| JP2007203975A | 2007-08-16 |
Other References:
See also references of EP 2639098A4
Attorney, Agent or Firm:
AYATA Masamichi (JP)
Masamichi Ayada (JP)
Masamichi Ayada (JP)
Download PDF:
Claims:
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