KR960021744A - Three-speed gear train of car automatic transmission - Google Patents

Abstract

It is a means to improve fuel efficiency by reducing the weight by providing a structurally simple three-speed gear train, and the planetary shaft is arranged around the input shaft and outputs a transmission ratio of three forward speeds and one reverse speed. First and second friction elements for selectively rotating the gear unit, the sun gear and the planetary carrier of the planetary gear device and the input shaft to transmit rotational power, and the planetary gear device, the ring gear and the planet carrier are selectively reacted with reaction force. A three-speed gear train of an automatic transmission for a vehicle comprising third and fourth friction elements that can act.

Description

Three-speed gear train of car automatic transmission

As this is a public information case, the full text was not included.

1 is a gear train according to the present invention,

2 is a table of the operating elements for each shift stage of the transmission according to the present invention,

3 shows a conventional three speed automatic transmission gear train.

Claims (6)

Rotational power is provided by selectively connecting the input shaft receiving engine power, the planetary gear unit arranged around the input shaft to output the gear ratio of 3 forward speed and 1 reverse speed, and the sun gear and the planet carrier of the planetary gear device and the input shaft. A three-speed gear train of an automatic transmission for a vehicle including first and second friction elements for transmitting the first and second friction elements to selectively act as a reaction force between the ring gear and the planet carrier of the planetary gear device. . 2. The planetary gear device according to claim 1, wherein the planetary gear device includes a sun gear, a single pinion geared to the outer circumference of the sun gear, a first double pinion geared to the outside of the sun gear, and a second gear toothed to the first pinion. The double pinion, the single pinion and the second double pinion in common include a gear that is geared to the inner circumference, wherein the first and second double pinions are three of the automatic transmission for a vehicle that is divided into planetary carriers Gear train. 3. The three-speed gear train of an automatic transmission for a vehicle according to claim 2, wherein the single pinion is connected to the output shaft to transmit the reduction ratio of the planetary gear to the wheel. 3. The three-speed gear train of an automatic transmission for a vehicle according to claim 2, wherein the ring gear of the planetary gear device acts as a reaction force element at one speed. 3. The three-speed gear train of an automatic transmission for a vehicle according to claim 2, wherein the planet carrier of the planetary gear device acts as a reaction force element at two speeds. The three-speed gear train of an automatic transmission for a vehicle according to claim 2, wherein the sun gear and the planet carrier of the planetary gear device are input elements in common at three speeds. ※ Note: The disclosure is based on the initial application.