KR970046286A - 4-speed automatic transmission - Google Patents

Abstract

An object of the present invention is to connect each gear element to have a variable connection structure with a fixed connection structure in a gear train consisting of two sets of double pinion planetary gear mechanism connected to the input shaft and a single pinion planetary gear mechanism connected to the output shaft R stage ( Reverse) Reduces power loss by allowing the rotational speed of the entire element of the planetary gear mechanism to rotate between the input and output speeds during shifting, and provides a four-speed automatic transmission with reduced frictional losses due to the placement of other friction elements. It is. Means of the present invention for achieving the above object comprises a double pinion planetary gear mechanism (hereinafter referred to as a first gear mechanism) connected to the input shaft and a single pinion planetary gear mechanism (hereinafter referred to as a second gear mechanism) connected to the output shaft 4 A speed automatic transmission comprising: a first clutch selectively connecting an input shaft connected to a carrier of the first gear mechanism, ring gears on both sides of the first and second gear mechanisms, and the first and second gear mechanisms. A second clutch for selectively connecting both carriers, a third clutch for selectively connecting any one of the ring gear and the carrier of the first gear mechanism and the sun gear and the carrier, and stopping the rotation of the carrier of the second gear mechanism And a first brake for stopping rotation of both sun gears fixedly connected to the first and second gear mechanisms, and a ring gear of the second gear mechanism. And an output shaft which is formed as.

Description

4-speed automatic transmission

Since this is an open matter, no full text was included.

1 is a system diagram showing a first embodiment of a four-speed automatic transmission according to the present invention.

2 is a system diagram showing a second embodiment of a four-speed automatic transmission according to the present invention.

Claims (2)

A four-speed automatic transmission comprising a double pinion planetary gear mechanism (hereinafter referred to as a first gear mechanism) to which an input shaft is connected and a single pinion planetary gear mechanism (hereinafter referred to as a second gear mechanism) to which an output shaft is connected, wherein the first gear mechanism A first clutch selectively connecting the input shaft connected to the carriers of the carrier, both ring gears of the first and second gear mechanisms, and a second clutch selectively connecting both carriers of the first and second gear mechanisms; A third clutch selectively connecting any one of a ring gear and a carrier of the first gear mechanism and a sun gear and a carrier, a first brake to stop rotation of the carrier of the second gear mechanism, and the first and And a second brake for stopping rotation of both sun gears fixedly connected to the second gear mechanism, an output shaft directly connected to the ring gear of the second gear mechanism, and 4 speed automatic transmission. The method of claim 1, wherein the first speed is obtained by combining only the first clutch and the first brake, and the second speed is obtained by releasing the first brake and engaging the second brake while maintaining the engaged state of the first clutch. The third speed is obtained by releasing the first and second brakes and engaging the second clutch while maintaining the engagement state of the first clutch, and the fourth speed is obtained by releasing the first clutch and the second clutch and the second clutch. Obtained by combining two brakes, the reverse (R-speed) is a four-speed automatic transmission characterized in that the gear stage is obtained by combining the third clutch and the first brake in a state in which the second clutch and the second brake is released. .