Search results for "Powertrain"

Online Fault Diagnosis System for Electric Powertrains Using Advanced Signal Processing and Machine Learning

2018

Online condition monitoring and fault diagnosis systems are necessary to prevent unexpected downtimes in critical electric powertrains. The machine learning algorithms provide a better way to diagnose faults in complex cases, such as mixed faults and/or in variable speed conditions. Most of studies focus on training phases of the machine learning algorithms, but the development of the trained machine learning algorithms for an online diagnosis system is not detailed. In this study, a complete procedure of training and implementation of an online fault diagnosis system is presented and discussed. Aspects of the development of an online fault diagnosis based on machine learning algorithms are…

A Computational Approach to Vibration Control of Vehicle Engine-Body Systems

2012

In recent years, the noise and vibration of cars have become increasingly important [20, 23, 29, 30, 35]. A major comfort aspect is the transmission of engine-induced vibrations through powertrain mounts into the chassis (see Figure 1). Engine and powertrain mounts are usually designed according to criteria that incorporate a trade-off between the isolation of the engine from the chassis and the restriction of engine movements. The engine mount is an efficient passive means to isolate the car chassis structure from the engine vibration. However, the passive means for isolation is efficient only in the high frequency range. However the vibration disturbance generated by the engine occurs mai…

Power Losses Minimization for Optimal Operating Maps in Power-Split HEVs: A Case Study on the Chevrolet Volt

2021

The power-split architecture is the most promising hybrid electric powertrain. However, a real advantage in energy saving while maintaining high performance can be achieved only by the implementation of a proper energy management strategy. This requires an optimized functional design before and a comprehensive analysis of the powertrain losses after, which could be rather challenging owing to the constructive complexity of the power-split transmission, especially for multi-mode architecture with multiple planetary gearing. This difficulty was overcome by a dimensionless model, already available in the literature, that enables the analysis of any power-split transmission, even in full electr…

Characterization of the Dynamic Interaction between Chassis and Powertrain of a Vehicle Using the Coupling Matrix

2013

International audience; This study is concerned with the vibration transmission between two subsystems of a vehicle: the chassis which is considered as an elastic structure and the powertrain which is considered as a rigid body. The study is carried out based on a new coupling matrix constructed from equations of dynamic behavior of each subsystems. This matrix depends only on the impedance matrices of the two subsystems and the mechanical characteristics of the linking mounts. Under some assumptions, a simplified expression to obtain the overall behaviour of the entire system is proposed. Despite its sensitivity to the degree of coupling between the subsystems, this method can be applied t…

Control of the Transmission Ratio Derivative in Passenger Car Powertrain with CVT

2001

OPTIMAL OPERATION OF POWER-SPLIT HYBRID ELECTRIC POWERTRAIN: COMPARISON BETWEEN TWO PERFORMANCE INDICES

2022

Among all the current environmentally-friendly ground vehicles proposed to reduce fuel consumption and emissions, power-split hybrid electric vehicles represent one of the most promising solutions. Their operation is based on the cooperation of the thermal engine and the electric unit enabled by mechanical transmissions consisting of planetary and ordinary gear sets. However, implementing proper energy management strategies to realise the best powertrain operations is crucial to maximise the environmental gain without compromising performance and drivability. For this purpose, an initial comprehensive analysis of the powertrain response is required. In this respect, this paper relies on a u…

A comparison of force-, velocity- and balanced training approach on force-velocity mechanical outputs and vertical jump height – of national level at…

2019

Master's thesis Sports Science ME517 - University of Agder 2019 INTRODUKSJON.Optimalisering av muskulær power-produksjon har blitt vurderttil å være en essensiell del av prestasjon i ulike idretter, men det foreligger lite litteratur på utøvere på nasjonalt nivå. På bakgrunn av dette,er målet med studien å sammenlikne hvilkettreningsprogram (kraftdominert, hastighetsdominert eller balansert) som er mest gunstig for å øke kraft-hastighetsparametre (F0, V0& Pmax)og vertikal hopphøyde. METODE.Trettifem mannlige elite-utøvere ble rekruttert og delt med stratifisert randomisering ut ifraderes kraft-hastighetsprofil inn i tre ulike treningsgrupper(kraftdominert, hastighetsdominert og balansert), …