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AUTOMATIC TRANSAXLE K13 K First gear Planetary gear setting The rotation speed is "0" for "fix ed " as it does not rotate. Taking i1 as the gear ratio in first gear, i1=Rear planetary gear ratio (i1) x Reduction planetary gear ratio (iRD) First, find i1: • Since the setting of the planetary gear in first gear is NRR = fixed = 0, substitute this condition in formula (1). (ZRR+ZRS)NRC=ZRSxNRS i1=NRS/NRC=(ZRR+ZRS)/ZRS Next, find iRD: • Since the setting of the planetary gear in first gear is NDS = fixed = 0, substitute this condition in formula (1). (ZDR+ZDS)NDC=ZDRxNDR iRD=NDR/NDC=(ZDR+ZDS)/ZDR (Since the iRD of first to fourth gears and reverse gear are common, the calculation formula is omitted except for fifth gear.) Therefore, i1 shall be as follows: i1=i1xiRD=(ZRR+ZRS)/ZRSx(ZDR+ZDS)/ZDR =(75+42)/42x(85+31)/85=3.802 Planetary gear unit Front Rear Reduction Internal gear NRR (fixed) NDR (input) planetary carrier NRC (output) NDC (output) Sun gear NRS (input) NDS (fixed) AMU0517A512 |