Estimation of the Gearbox No-Load Losses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00309813" target="_blank" >RIV/68407700:21220/16:00309813 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.4271/2016-01-1092" target="_blank" >http://dx.doi.org/10.4271/2016-01-1092</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2016-01-1092" target="_blank" >10.4271/2016-01-1092</a>

Result language

angličtina

Original language name

Estimation of the Gearbox No-Load Losses

Original language description

In the laboratories of CTU in Prague, an inertia test stand was recently built for endurance tests of the internal shift mechanisms of passenger cars. With regard to the instrumentation of the stand, it can be used also for determination of lost power of the not-loaded transmission. In this paper we present the values for the no-load losses measured during different conditions (temperature, shifted speed, speed of rotation) on the automotive mechanical gearbox for the transversal disposition of the drivetrain. For the further usage of the measured values is important to determine the proportion of the different sources of losses. We are mainly interested to identify the proportion of the churning losses and losses in the sealing, since these two losses remain the same, whatever the load of the gearbox will be. The losses of bearings on input and secondary shaft were calculated with the tool available from SKF. The load of the bearings was calculated from the measured drag torque. The losses of the tapered roller bearings on the output shafts were measured. The viscosity changes nonlinearly with the temperature. To cover big span of temperatures, including the low temperatures, where the churning losses are very high, the gearbox was enclosed in an isolation box filled with coolant. To observe the gearbox temperature behavior in reality, the gearbox was monitored during different driving conditions.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JT - Propulsion, engines and fuels

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Name of the periodical

SAE Papers

ISSN

0148-7191

e-ISSN

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Volume of the periodical

2016

Issue of the periodical within the volume

2016-01-1092

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

1-8

UT code for WoS article

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EID of the result in the Scopus database

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