Yhteystiedot

Ammattilehti.fi
Vironkatu 9, 00170 Helsinki
www.ammattilehti.fi

Janne Jokela
janne.jokela@ammattilehti.fi
050 412 9030

Taneli Jokela
taneli.jokela@ammattilehti.fi
050 320 8174

Tero Lahtinen
tero.lahtinen@ammattilehti.fi
050 464 7972

Satunnaiset kuvat

Reducing diesel consumption

Share |
20.09.2018 11:11

daisel1.jpg

Manufacturers of rail vehicles require efficient and easily configurable cooling systems to reduce energy consumption and comply with new and complex emission guidelines. Fan drives that provide very fine speed adjustment are required to fulfill the important role of proper temperature control. Exacting design requirements, such that diesel engine cooling circuits in power conversion generators can maintain tight temperature windows irrespective of load and environmental conditions, all while reducing fuel consumption, are our hallmark.

State of the art designs require a more intelligent cooling system. Bosch Rexroth has therefore developed a modular drive system with specially engineered control units. Together with the control system for the diesel engine, the cooling system control unit delivers optimum fan speed. Variable displacement axial piston pumps generate the necessary flow to drive the fans via compact hydraulic motors. The cooling system control unit is part of the Rexroth BODAS family of modular mobile control systems. The electronic hydraulic system control allows rail vehicle OEMs to tailor drives to various climatic zones and update profiles via software – with no changes to the hardware. 

The system solutions from Rexroth decouple the diesel engine speed from the cooling fan speed. The electronic control system monitors various sensor feedback data such as the temperatures of engine coolant, turbo charge air, generator coolant and hydraulic oil. Using these sensor values, it calculates the necessary cooling power independent of engine speed. As a result, it shifts the technical challenge from cooling mechanics to intelligent drive control. For many operating conditions, achieving maximum cooling is not the main goal; it is instead to keep the charge air flow within a narrow temperature window in order to ensure optimum exhaust gas combustion. 

Recent developments in electro-hydraulic in high performance solutions use hydrostatic circuits and secondary control systems with variable displacement motors. With these control system enhancements, efficiency gains increase while the fuel consumption of the diesel engine is further reduced. Rexroth can also utilize variable speed electric fan drives to cool power conversion.

Rexroth has been a reliable drive and control specialist for decades and a development partner to manufacturers of rail vehicles of all types. Rexroth has been heavily involved with the simulation, construction and design of cooling systems, covering everything from the selection of components to the software for control and including connectivity with the overall system.

18.02.2019 13:22Change on the Board of Management of Bosch Rexroth AG
17.02.2019 12:22Hydrauliikkajärjestelmien huollot ja modernisoinnit takaavat teollisuuden tuotantotehokkuuden
16.02.2019 11:22Arri Priimägin tieteellinen rohkeus palkittiin akatemiapalkinnolla
15.02.2019 15:38Suomalainen sijoittajaryhmä ostaa Senticalta enemmistöosuuden teollisuuskalusteita valmistavasta Trestonista
15.02.2019 9:02Suomalaisyritykset panostavat innovaatiotoimintaan aiemmin arvioitua enemmän
14.02.2019 8:11Maailman ensimmäinen LNG-jäänmurtaja Polaris bunkrattiin Porissa ja Torniossa
13.02.2019 8:55Parker Domnick Hunter ja Agidens Automation yhteistyöhön
13.02.2019 8:36Keyencen kuituanturisarja ja nesteiden virtausanturi vievät mittauksen uudelle tasolle
13.02.2019 8:12PRH poistaa kaupparekisteristä osakeyhtiöitä ja osuuskuntia, jos tilinpäätöstä ei ilmoiteta 27.5.2019 mennessä
12.02.2019 17:20HAWE Hydraulik erhält den Deutschen Unternehmerpreis

Siirry arkistoon »