Unltfid S131€S P319111 [19] [11] Patent Number: 5,376,869 Konrad [45] Date of Patent: Dec. 27, 1994 [54] ELECI‘RIC VEHICLE DRIVE TRAIN WITH ROLLBACK DE-I-ECHON AND FOREIGN PATENT DOCUMENTS COMPENSATION 0374960 6/1990 European Pat. Off. . 0585122A2 3/ 1994 European Pat. Off. . [75] Inventor: Charles E. Konrad, Roanoke, Va. 2559253 10/1991 France _ [73] Assignee: General Electric Company, ‘ $<=h9n<-wwdy, N-Y. W093/04888 3/1993 WIPO . [21] Appl. No.: 16,551 Primary Examiner-—Paul Ip [22] F118 dz Feb. 11’ 1993 Attorney, Agent, or Firm-Bell, Seltzer, Park & Gibson [57] ABSTRACT 51 Int. Cl.5 ........................ .. H02P 3/10- HO2H 3/17 I521 U.S. Cl. .................................. .. 318/5,87; 318/139; A11 e1@_<="i° vehicle drive Fail“ include? 9 °°I1"°11'~‘=Y f°Y 318/373; 364/426.2; 180/282 69119611111118 mg <l=°P1P@:::1tg1g 161 :_l'<’=111<=1<:'= _I°11P=1°1<;n=;1S 58 F‘ Id f S h .............................. .. 318/560-646, W en 9 VF ° 615 5 e “PW” °n an 111° me- '3 [ 1 le 318/18;;-’c37o_376. 364/424_426. 180/232’ 65 vehicle includes an electric motor rotatable in opposite A; 188/2 D1 361/31,’ 58’ 93’ 87; 19,2/4 A’ 3 TR’ directions corresponding I20 opposite dIrections 01' vehi9 cle movement. A gear selector pemuts the driver to select an intended or desired direction of vehicle move[56] References Cited ment. If a speed and rotational sensor associated with U_S_ PATENT DOCUMENTS the motor indicates vehicle movement opposite to the ' ddd' ti f h'1 t,th t ' Re. 34,159 1/1993 Harrington ......................... .. 361/31 §‘,‘§],n°,O ,j‘f§,q‘,’,‘,1,‘,§u1‘1,f,1‘§n‘:,g’f,51f,§’§“;j,’§, njnfifnféji 4,217,643 8/1980 Anderson et al. ................ .. 364/426 - 1,351,405 9/1982 F161 ds at 31 1 fur111<l:)t1o1r<1o%1het1'ollbaclt<_speed to couigeractg the vtlaifrilicle 4,529,919 7/1985 Melocik et al. ................. .. 318/373 '° 8° ' P °“1“e ““° ‘.°“ may e P‘ er a ea’ 4,629,043 12/1986 Matsuo et al. .................... .. 192/4 A f“11°t1°“ °f SPEEE °T 4 f“"°t1°" °f the Speed Squared4,9l3,258 4/ 1990 Sakurai et al. . 5,040,088 8/ 1991 Harrington ......................... .. 361/31 27 Claims, 5 Drawing Sheets VEI-I CLE S P E E D I I I I I I I I I I I I I I 1 IA __ lvl OTOR I TO R Q U E
