Control device

Abstract

Both the control of transmission shock due to transmission operation and improved energy efficiency will be achieved in cases when shifting to a low gear ratio gear in a state when the accelerator opening angle of a vehicle is at or below a specified value. Disclosed is a transmission device control device, which is equipped with an input member, which drive-couples to an engine and a dynamo-electric machine, an output member, and a transmission mechanism, which switches between multiple gears by controlling the engagement and disengagement of a plurality of frictional engagement elements, converts the rotational velocity of the input member by the gear ratio of the various gears and outputs the velocity to the output member. When shifting to a low gear ratio gear in a low accelerator opening state, the disengagement side hydraulic pressure, which is the hydraulic pressure of the hydraulic fluid for the disengagement side element on the side that is disengaged, is reduced to allow the disengagement side element to slip, and this slip condition is maintained throughout the transmission process from the time that said disengagement side element begins to slip until the time that the rotational velocity obtained by multiplying the rotational velocity of the output member by the gear ratio after shifting gears synchronizes with the rotational velocity of the input member.

Description

technical field [0001] The present invention relates to a control device for controlling a speed change device. The speed change device includes: an input part, which is drivingly connected to an engine and a rotating electric machine; an output part, which is drivingly connected to a wheel; a speed change mechanism, which has a plurality of friction engagement members, And by controlling the engagement and disengagement of a plurality of frictional engagement members, a plurality of shift speeds are switched, and the rotation speed of the input part is changed by the speed ratio of each shift speed to output to the output part. Background technique [0002] A driving device for a vehicle having a speed change device, the speed change device comprising: an input part, which is drivingly connected to an engine; an output part, which is drivingly connected to a wheel; a speed change mechanism, which has a plurality of frictional engagement members and is controlled by Engageme...

AI Technical Summary

Problems solved by technology

However, in the transmission device included in the hybrid vehicle driving device of Patent Document 2, if the brake operation is performed according to the intention of the driver of the vehicle when the accelerator opening is equal to or smaller than a predetermined value, the brake operation will be performed. There are cases where regenerative braking based on rotating electric machines is performed

In this case, if the above-mentioned normal shifting is performed, the rotational speed of the input member increases due to the output of a relatively large negative torque (regenerative torque) by the rotating electric machine, and the amplitude decreases, causing a sudden change, and a shift occurs. The possibility of impact is high

Therefore, in the vehicle drive device described in Patent Document 2, the magnitude of the negative torque output by the rotary electric machine when the rotary electric machine is regenerative is limited to a certain value or less.

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