Papers by Keyword: Manual Transmission

Abstract: Introducing the concept of Battery Electric Vehicle developed at the Technical University of Liberec, intended for test and educational purposes. It is a lightweight four wheeled vehicle with an open frame primarily designed for ease of access to all major vehicle components. For the main structural elements of the vehicle frame was chosen modular system of extruded aluminum profiles. The vehicle power unit consists of BLDC motor paired with multi-speed manual transmission. Traction battery with regard for the electrical safety consists of 17s LFP cells only, resulting in a nominal voltage of 55 VDC (63 VDC fully charged). Total amount of energy stored in the traction battery is 10.8 kWh.

Abstract: In the study, a five-speed manual transmission of commercial vehicles is modeled and assembled with three-dimensional (3D) software SolidWorks. In order to analyze the kinematic and dynamic performance of the manual transmission, its 3D model is imported into the software ADAMS and the Hertz elastic contact theory is applied to calculate the contact force and deformation of the meshing gears. Finally, the speed and meshing force of the meshing gears have been obtained, which are consistent with the actual situation. This method can provide guidance for the design of the key components of the transmission, and thus can shorten the development cycle and reduce the development cost of the transmission.

Abstract: This paper takes a minivan’s manual transmission as the research object. The structure of the lock ring inertia synchronizer, the synchronizing principle and the test bench structure are introduced. After a series of tests, the test dates were analyzed and the results show that the test bench accord with the design requirements.

Abstract: In order to resolver the question of transmission reverse gear noise, this paper construct virtual transmission model with MASTA soft and analyze NVH ,computed transmission system frequency and gear mesh frequency, finally, find system’ resonation point and corresponding engine speed, this result is accordant to test one, finally, paper draw a conclusion that the noise is caused by resonation at some engine speed.

Abstract: In this study, we proposed a process of an accelerated life testing method of 5-speed manual transmissions used in vehicles, which loads are consisted of multiple alternating loads. The entire process of an 5-speed manual transmission’s accelerated life testing method where no failures are allowed, is a process that requires an abundance of assumptions, and other factors that are estimates such as the shape parameter, beta(
) and the fatigue damage exponent (x). And the process is consisted of 7-step process. From the 1-setp, which is the deriving the service(use) torque and speed(rpm) profile of the transmission, to the 7-step, we could determine the accelerated life time, the accelerated torque and the accelerated speed(rpm), which are the equivalent cumulative fatigue damage. Also, we have performed accelerated life test on 5-speed manual transmission by using the following 7-step process.

Abstract: This paper presents a discrete analysis approach to investigate performance of the DMF. An arcspring installed between the flywheels is modeled as n - discrete elements. Each element consists of mass, spring and nonlinear friction element. The nonlinear friction model is proposed to describe Stribeck effect and viscous friction depending on the relative sliding velocity. The DMF performance such as hysterisis characteristics are investigated by comparing the experimental result. In addition, the torque characteristics transmitted to the driveshaft are evaluated by comparing the test result from manual transmission bench tester. It is found that discrete DMF model described the automotive driveline behavior closely. It is also found that the friction characteristics of the arcspring depends on the relative sliding velocity between the friction surfaces, which varies depending on the relative position of the DMF arcspring.