Dog clutch control apparatus for automated transmission

Abstract

The invention provides a dog clutch control apparatus for an automated transmission, and can move a sleeve in a speed change to realize quick action of a speed change when the sleeve is engaged with a dog clutch. A spline (36a) of the sleeve is formed by high teeth (36a1) and a low tooth (36a2), a dog clutch portion has a dog cluth speed change mechanism formed by clutch front teeth (30b1) and clutch rear teeth (30b2) and a control apparatus which controls action of an axial driving device based on a detection position of a stroke position sensor (38), and the control apparatus controls a thrust load so as to ensure that the thrust load which generates a relative rotation between the sleeve and the dog cluth position against a frictional force generated by contact between an end surface (36a4) of each of the high teeth of the sleeve and a front end surface (30b6) of each of the clutch rear teeth of the dog slutch position is applied to the sleeve in a rotation adjustment range in which the high teeth of the spline advance from a front end part of the clutch front teeth to a front end part of the cluth rear teeth.

Description

technical field [0001] The present invention relates to a control device for a dog clutch used in an automatic transmission for vehicles. Background technique [0002] Conventionally, a powertrain of a vehicle has a transmission that converts torque and rotational speed in order to transmit rotation and torque from a driving device such as an engine or an electric motor used for driving to driving wheels according to driving conditions. There are many kinds of transmissions, for example, known transmissions as follows: that is, a plurality of idler gears and A holding mesh type transmission in which a plurality of gears provided on a countershaft provided in parallel to a rotating shaft in a circumferential direction keep meshing. In this holding mesh type transmission, sleeves are lined up on the idler gears, and the sleeves are spline-fitted to the rotating shaft so as to be movable in the direction of the rotation axis. The engaging teeth (splines) on the engaging surfa...

AI Technical Summary

Problems solved by technology

Therefore, when it is judged that the sleeve cannot be engaged with the dog clutch of the idler gear, the pawl has been pressed against the sleeve so that the difference in rotational speed between the sleeve and the idler gear becomes small, and the lower gear is reached. It takes a certain amount of time to reach a position that can be engaged, or the time until the next engagement becomes longer due to the driven rotation

As a result, it may take a long shifting time

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