PROBLEM TO BE SOLVED: To provide a traction control device for an electric vehicle, which can always determine a slip of a drive wheel quickly and securely regardless of road surface conditions, and quickly suppress the slip of the drive wheel based on the slip determination.SOLUTION: Estimated right and left wheels speeds L' and R' are separately calculated by an estimation wheel speed calculating unit 21 based on motor torque, an estimated road surface reactive force and an LSD locking rate, a slip is determined by a slip determination unit 22 based on comparison between the estimated wheels speeds L' and R' and a vehicle speed, and a control amount a1 of the motor torque and a control amount a2 of the LSD locking rate which are necessary for slip suppression are calculated by a control amount calculating unit 23. Along therewith, the slip is determined based on actual wheel speeds L and R in the same procedure to calculate control amounts b1 and b2, and a motor 2 and an LSD 4a are controlled based on final control amounts c1 and c2 determined by integrating the control amounts a1, a2, b1 and b2.SELECTED DRAWING: Figure 2
【課題】路面状態に関わらず常に駆動輪のスリップを迅速且つ確実に判定でき、このスリップ判定に基づき速やかに駆動輪のスリップを抑制できる電動車両のトラクション制御装置を提供する。【解決手段】モータトルク、推定路面反力及びLSDロック率に基づき推定車輪速演算部21で左右の推定車輪速L’,R’を個別に算出し、各推定車輪速L’,R’と車体速度との比較に基づきスリップ判定部22でスリップ判定すると共に、制御量演算部23でスリップ抑制に必要なモータトルクの制御量a1及びLSDロック率の制御量a2を算出する。これと並行して実車輪速L,Rに基づき同様の手順でスリップ判定して制御量b1,b2を算出し、これらの制御量a1,a2,b1,b2を統合して決定した最終的な制御量c1,c2に基づきモータ2及びLSD4aを制御する。【選択図】図2
TRACTION CONTROL DEVICE FOR ELECTRIC VEHICLE
電動車両のトラクション制御装置
2017-12-21
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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