China
Africa
Explore chapters and articles related to this topic
Hybrid Electric Vehicles
Published in Kwang Hee Nam, and Electric Vehicle Applications, 2017
A planetary gear together with a motor and a generator plays a key role in the engine power splitting in the series/parallel hybrid configuration. The planetary gear consists of sun gear, planetary gear, and ring gear, as shown in Fig. 12.5. The sun gear is located in the center, the ring gear is positioned in the outer shell, and the planetary carrier is made by clustering the pinions in the middle. Based on the schematic shown in Fig. 12.5 (a), it follows that
Design and Kinematic Analysis of Gears
Published in Kevin Russell, Qiong Shen, Raj S. Sodhi, Kinematics and Dynamics of Mechanical Systems Implementation in MATLAB® and Simmechanics®, 2018
Kevin Russell, Qiong Shen, Raj S. Sodhi
Planetary gear trains are commonly used in transmission systems. Figures 8.21b and c illustrate a planetary gear train used in a speed reduction system (Figure 8.21a). Within this speed reduction system (as the name implies), the input rotational speed of the driving shaft is reduced and delivered to the output shaft.
Power Transmission, Brakes and Cooling Systems
Published in Iqbal Husain, Electric and Hybrid Vehicles, 2021
The planetary gear has the advantages of high power density and large gear reduction in a small volume. In hybrid vehicles, these gears enable multiple kinematic combinations and coaxial shafting of three powertrain components. The disadvantages of planetary gears are high bearing loads and design complexity.
Dynamic Simulation Research of Hydro-Mechanical CVT
Published in IETE Journal of Research, 2022
Maohua Xiao, Yuewen Wang, Fan Zou, Haijun Zhang, Xianhua Li
In summary, many researchers conducted a more detailed study on the scheme design, control strategy and system, the circulating power mechanism of Hydro -Mechanical CVT technology. K.S. Ivanov [21–23] focused on the meshing force of the gear automatic adaptive variator with constant engagement of gears and a single speed (CVT) transmission. But planetary row is the core of the hydraulic mechanical CVT, and its internal gear is the main drive part of the power bus coupling. The planetary gear system not only involves the outer meshing of the planetary wheel and the sun wheel, but also the meshing between the planetary wheel and the ring gear, and the rotation of the planetary wheel itself around the planet carrier and revolving around the sun wheel [24]. Thus, the movement of the planetary gear mechanism is complex and varied, involving more parts, the movement is special, the restraint mode is also complex, its dynamic situation is also complicated and changeable. The planetary row is the convergence mechanism of the hydraulic mechanical stepless gearbox. The gears are working at changing speed and load. The impact of the load on the tooth surface is easy to cause the gears to be damaged. At present, the relevant research carried out at home and abroad is relatively small. So it is very important to study the dynamic characteristics of hydraulic mechanical continuously variable transmission.
A graph-based approach for detection degenerate structures in multi-planet gear trains
Published in Cogent Engineering, 2022
Tamather N. Ali, Essam L. Esmail, Hind Nafeh
Planetary gear trains are commonly used in transmission systems of machines, automobiles, and robots. Because of the graph theory-based representation of a PGT, structural synthesis algorithms have been developed for enumerating all feasible concepts in the form of non-isomorphic graphs. The enumerated PGTs are important to a PGT designer during the conceptual stage of design. The detection and elimination of graphs with degenerate structure/s as subgraphs is a critical step in the structural synthesis. This paper presents a graph theory-based method for detecting degenerate PGT graphs during the enumerated collection. The result of this work is beneficial for the automation of the structural synthesis of planetary gear trains.
Integrated energy management strategy of powertrain and cooling system for PHEV
Published in International Journal of Green Energy, 2020
Xing Xu, Tao Zhang, Feng Wang, Shaohua Wang, Zhiguang Zhou
Due to global warming and energy shortage, more and more researches focus on new energy vehicles such as plug-in hybrid electric vehicle (PHEV). Through the effective cooperation between the electric driving system and engine, PHEV can greatly reduce energy consumption and harmful emission (Overington and Rajakaruna 2012; Sabri, Danapalasingam, and Rahmat 2016; Salmasi 2007). PHEV with a power-split planetary gear system has advantages such as compact structure and multiple working modes, which can be more flexible in power distribution.