Automobile and transmission thereof

Abstract

The invention discloses an automobile and a transmission thereof. The transmission comprises a casing, an input shaft, a Ravigneaux's planetary gear train, a first single-row single-stage planetary gear train and a second single-row single-stage planetary gear train. The first single-row single-stage planetary gear train comprises a first sun wheel sleeved on the input shaft, a first planet wheel, a first planet carrier and a first inner gear ring. The Ravigneaux's planetary gear train comprises a large sun wheel, a small sun wheel, a long planet wheel, a short planet wheel, a planet carrier and an inner gear ring. The large sun wheel, the small sun wheel, the first inner gear ring, the planet carrier and the input shaft are connected respectively in separating mode. The second single-row single-stage planetary gear train comprises a second sun wheel sleeved on the input shaft, a second planet wheel, a second planet carrier and a second inner gear ring, and the second planet carrier is fixed on the planet carrier. A first brake is used for braking the large sun wheel, a second brake is used for braking the planet carrier, and a third brake is used for braking the second inner gear ring. The transmission achieves design of seven forward gears, is simple in structure and high in gear shifting efficiency.

Description

technical field [0001] The invention relates to the technical field of automobile construction, in particular to an automobile and a transmission thereof. Background technique [0002] Traditional automobile gearboxes are generally divided into two types: manual (MT) and automatic (AT). MT has the advantages of high transmission efficiency and strong operation feeling, but for urban working conditions, especially in the case of road congestion, frequent transmission is required. Manual shifting can easily lead to driver fatigue and accidents such as rear-end collisions. [0003] The AT gearbox can realize the automatic shift function, but the structure of the AT gearbox is complicated, the cost is high, and it is generally five-speed or six-speed, and the transmission ratio range is relatively narrow, resulting in poor fuel economy of the engine. Contents of the invention [0004] The present invention aims to solve at least one of the technical problems existing in the p...

AI Technical Summary

Problems solved by technology

[0002] Traditional automobile gearboxes are generally divided into two types: manual (MT) and automatic (AT). MT has the advantages of high transmission efficiency and strong operation feeling, but for urban working conditions, especially in the case of road congestion, frequent transmission is required. Manual shifting can easily lead to driver fatigue and accidents such as rear-end collisions

[0003] The AT gearbox can realize automatic shifting function, but the structure of the AT gearbox is complicated, the cost is high, and it is generally five-speed or six-speed, and the transmission ratio range is relatively narrow, resulting in poor fuel economy of the engine

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