Toyota Coaster planetary gear train and its clutch and brake circuit diagram

The torque converter of the A441E automatic transmission can realize stepless speed change, and the gear trains of several sets of planetary gears and the brakes and clutches matched with them can realize the transmission ratio of 1=2.950, i2=1,530, i3=1.000, i super =0.717 The forward speed of the four gears and the gear ratio are i reverse = 2.78, and the working conditions of each gear clutch and brake are as shown in Fig. 6. The structure is shown in Figure 9, as shown in Figure 10.

The planetary gear set consists of a center wheel (also known as a sun gear), a ring gear and a planet carrier, and a planetary gear. Any one of the center wheel, the ring gear and the carrier is used as an active member to connect it to the input shaft. The other component is connected to the output shaft as a passive component, and then the third component is restrained so that the brake does not rotate, so that the entire planetary gear mechanism transmits power with a certain gear ratio. There are two possible options for these three basic components. There are six different combinations, resulting in a speed-increasing drive (overspeed), a reduction drive and neutral. The main control of the planetary gear set in the A441E automatic transmission is three multi-plate clutches, three multi-plate brakes and two one-way clutches, the functions of which are as follows.

C0-speed over-speed clutch: connects the heart wheel and planet carrier of the overspeed planetary gear. The master follower is 3/3.
C1 a front clutch: connects the input shaft and the intermediate shaft. The master follower is 6/6.
C2 one rear clutch: connecting the input shaft and the common planetary gear, the main follower is 5 pieces/5 pieces.
B0 an overspeed brake: the overspeed center wheel is fixed, and the main follower is 3 pieces/3 pieces.
B2 one or two brakes: the common center wheel is fixed. The master follower is 4 pieces / 4 pieces.
B3 one-shift and reverse brake: the front carrier is fixed, and the main follower is 6/6.
F0-speed overrunning one-way clutch: connects the overspeed center wheel and the overspeed planet carrier when the transmission is driven by the engine.
F2 a front carrier (No. 2) one-way clutch: prevents the front carrier from rotating in the opposite direction.