Design innovation in dynamic coupling of starting system for internal combustion engines

Michelotti, Alvaro C.; Silva, Jonny Carlos da

doi:10.1007/s40430-015-0375-8

Cited by 8 publications

(1 citation statement)

References 11 publications

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“…This advantage can be of significant importance for, e.g., small-size engines that need to be run at high rpm [23] but usually feature reduced torque and can therefore be coupled with cost-effective high-torque/lowrpm EMs. The actual design of belt-coupling solutions has remained essentially unchanged for decades [24], even if their main limitation is the belt slip phenomenon that hinders its widespread diffusion in large displacement power units (e.g., for trucks).…”

Section: Introductionmentioning

confidence: 99%

System Design and Stress–Strain Analysis for Cranking and Motoring Small-Size Engines

Cecere,

Irimescu,

Merola

2024

Designs

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The characterization of small-size engines requires dedicated rigs that are usually used for loading the power unit. Adding the possibility of motoring the engine is an important advantage that allows more detailed information on operating characteristics. It can be used for obtaining precious data that contribute to the development of more accurate numerical models and subsequent validation. Cost competitiveness is another essential aspect of small-size engines, given that development efforts need to be contained as much as possible. Within this context, the present work developed and tested a setup capable of cranking and motoring a small-size 50 cc spark ignition engine. Two configurations were considered for coupling an electric motor to the power unit: the first through a pulley-belt transmission and the second via a plastic clutch assembly. The main idea was to ensure the capability of motoring the engine up to a rotational velocity of 6000 rpm. Engine load was applied through a 1 kW electric generator connected directly to the crankshaft. The overall setup was designed in the two configurations and a stress–strain analysis was performed. The belt-driven option was found to be more favorable in terms of mechanical component requirements, showing a safety factor of around 4.0, while the plastic clutch assembly involved a more complex design phase and turned out to be more demanding, with a safety factor of around 2.9.

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Section: Introductionmentioning

confidence: 99%

System Design and Stress–Strain Analysis for Cranking and Motoring Small-Size Engines

Cecere,

Irimescu,

Merola

2024

Designs

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Novel Mechanical Interface Design for Automotive Starting Systems

Michelotti¹,

Silva

Nicolazzi

2019

Automot. Innov.

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Simulation of the electric starter system of the internal combustion engine start-up to study the impact on its operation of the pre-start battery discharge

Zhuravsky

Zanin

Квасов

2020

J. Phys.: Conf. Ser.

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The article is devoted to the actual problem of starting an automobile engine in conditions of low negative temperatures. To increase the likelihood of starting the engine when using autonomous means of pre-heating, it is necessary to optimally distribute the battery energy to the pre-start and start-up discharges. As a part of the creation of a system, an automated pre-start thermal preparation of an automobile engine the need arises to conduct research on the influence of the battery starting-up discharges on the parameters characterizing the functioning of the electric starter system. Research methods. A mathematical model of the electric starter system for starting the internal combustion engine is presented. The model is implemented using the software Mathcad 15. Results. As a result of the simulation of the start-up system, the dependencies of the crankshaft rotation speed on time have been obtained for various values of battery discharge and temperature. According to the frequency of rotation of the crankshaft and the coefficient of dynamism of the battery discharge and the temperature of the electrolyte are also derived. Findings. As a result of analyzing the data obtained in mathematical modelling it was determined that with decreasing electrolyte temperature the effect of the pre-discharge of the battery on the rotational speed of the crankshaft increases significantly. The ratio of the maximum rotational speed to the rotational speed of the crankshaft at the end of the start-up is almost independent of the degree of the battery discharge.

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Design innovation in dynamic coupling of starting system for internal combustion engines

Cited by 8 publications

References 11 publications

System Design and Stress–Strain Analysis for Cranking and Motoring Small-Size Engines

System Design and Stress–Strain Analysis for Cranking and Motoring Small-Size Engines

Novel Mechanical Interface Design for Automotive Starting Systems

Simulation of the electric starter system of the internal combustion engine start-up to study the impact on its operation of the pre-start battery discharge

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