Control apparatus for continuously-variable transmission of vehicle
A technology of continuously variable transmission and control device, applied in the direction of transmission device, transmission device control, mechanical equipment, etc., to achieve the effect of rapid speed change control, smooth speed change control, and prevention of belt slippage
Active Publication Date: 2012-06-27
JATCO LTD +1
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- Application Information
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Problems solved by technology
Moreover, the groove width of the V-shaped groove increases or decreases with the movement of the driven pulley (stroke displacement), and the effective rotation radius of the pulley is adjusted to make the power transmission ratio from the primary pulley to the secondary pulley change steplessly.
Method used
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Embodiment Construction
[0089] Below, refer to Figure 1 to Figure 7 Embodiments of the present invention will be described. In this embodiment, a belt-type continuously variable transmission as a continuously variable transmission for automobiles will be described as an example.
[0090] Figure 1 to Figure 7 It is a figure for explaining the hydraulic pressure control apparatus of the belt-type continuously variable transmission for vehicles which concerns on one Embodiment of this invention, figure 1 It is a functional block diagram of the speed change control part of the transmission controller related to the drive instruction of the stepping motor, figure 2 It is a schematic configuration diagram shown together with the speed change control system of the continuously variable transmission, image 3 is a block diagram showing the configuration of the pressure control system, Figure 4 is a hydraulic circuit diagram showing the hydraulic circuit near the secondary pulley, Figure 5 is the c...
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A control apparatus for an automatic transmission includes a control section having a normal control section configured to actuate the step motor (27) at a first speed by using a feedback control including an integral control in accordance with the target pulley ratio (Ipt) and the actual pulley ratio (Ipr), a high speed control section (103a) configured to actuate the step motor (27) at a secondspeed higher than the first speed by an open loop control based on the target pulley ratio, a judgment section (101) configured to judge whether there is a high speed operation request, and a switch section (P1) configured to select the normal control performed by the normal control section (103b) at a normal condition, and to switch to the high speed control when a switch start condition is satisfied, the switch start condition including a first condition that the judgment section judges there is the high speed operation request.
Description
technical field [0001] The present invention relates to a control device of a continuously variable transmission for automobiles that adjusts a gear ratio by using hydraulic pressure of working oil. Background technique [0002] The belt-type continuously variable transmission has a primary pulley (drive side pulley), a secondary pulley (driven side pulley), and a belt (V-belt) wrapped around the two pulleys. Each pulley rotates and turns The structure in which the fixed pulley (pulley) integrally formed on the shaft of the shaft (main shaft or auxiliary shaft) and the movable pulley (sliding pulley) that can move in the axial direction of the shaft are oppositely arranged, and the belt is pressed against the fixed pulley and the movable pulley. In the V-shaped groove, the power transmission is carried out. [0003] The movable pulley of each pulley moves in the axial direction so as to come into contact with and separate from the fixed pulley by adjusting the hydraulic pre...
Claims
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IPC IPC(8): F16H61/04F16H9/12
CPCF16H61/66259F16H61/04F16H9/00F16H61/00
Inventor 山口绿儿玉仁寿大曾根竜也饭田敏司篠原史涩谷寿幸小林淳文木村优典
Owner JATCO LTD