Hydraulic pressure controller
A hydraulic controller and hydraulic technology, applied in the direction of transmission control, valve details, belt/chain/gear, etc., can solve problems such as long time
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no. 1 example ）
[0031] The hydraulic controller 50 according to the first embodiment of the present disclosure is configured to control figure 1 Oil hydraulic circuit 28 of continuously variable transmission (CVT) 20 is shown. CVT 20 is provided in drive device 10 of the vehicle. The CVT 20 changes the rotational speed input from the engine 12 through the torque converter 14 and the forward / reverse movement switch 16 , and outputs the rotation to the reduction gear 18 .
[0032] First, the following reference figure 1 and figure 2 Describe CVT20. The CVT 20 includes an input shaft 21 , an output shaft 22 , a primary pulley 23 , a secondary pulley 25 , a power transmission belt 27 , and a hydraulic circuit 28 . The input shaft 21 and the output shaft 22 are arranged parallel to each other. The driving pulley 23 rotates with the input shaft 21 . The driven pulley 25 rotates with the output shaft 22 . The drive belt 27 is wound around the driving pulley 23 and the driven pulley 25 . The...
no. 2 example ）
[0085] Refer below Figure 16 A hydraulic controller 80 according to a second embodiment of the present disclosure is described. The difference between the hydraulic controller 80 and the hydraulic controller 50 is that the hydraulic controller 80 has a correction part 81 instead of the correction part 58 . The transfer function G3(s) of the notch filter used in the filter section 82 of the correction section 81 is given by the following equation (4):
[0086] G3(s)=G -1 (s)×G4(s)···(4)
[0087] G4(s) in formula (4) corresponds to the transfer function of the low-pass filter. G4(s) is given by the following equation (5):
[0088] G 4 ( s ) = [ ω C 2 ( s + ω ...
no. 3 example ）
[0093] The following will refer to Figure 18 and 19 A hydraulic pressure controller 90 according to a third embodiment of the present disclosure is described. The correction unit 91 of the hydraulic controller 90 sets the target excitation current I * Before being input to the manipulated value setting section 52, the target excitation current I * Corrected to correct the target excitation current Ir * . Specifically, as Figure 19 As shown, the correction unit 91 includes a first converter 94 , a filter unit 95 and a second converter 98 . The first converter 94 has a current-area converter 92 and an area-pressure converter 93 . The second converter 98 has a pressure-area converter 96 and an area-current converter 97 .
[0094] The first converter 94 converts the target excitation current I * It is converted into an appropriate hydraulic pressure Pc in a format suitable for the filter processing in the filter unit 95 . First, the current-area converter 92 converts th...
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