// Power­train Systems in Vehicles

Emis­si­on Opti­mi­sa­ti­on on the Chas­sis Dyno or the Road

For APL, vehi­cle deve­lo­p­ment acti­vi­ties begin with the first driv­a­ble proto­ty­pe. The projects and fiel­ds of acti­vi­ty are broad­ly diver­si­fied; star­ting with veri­fi­ca­ti­on of basic data, conti­nuing to opti­mi­sa­ti­on of the vehi­cle power­train — on the chas­sis dyna­mo­me­ter and/or the road — and finis­hing in certi­fi­ca­ti­on and confor­mi­ty of produc­tion (CoP).
Basic Data Input — On-Board Diagnostics (OBD) — Emissions
An important first step is the vali­da­ti­on of a basis vehi­cle data set, as deve­lo­ped on the engi­ne test bench. Test-drives world­wi­de ensu­re that deve­lo­p­ment goals can be met despi­te the influ­ence of factors such as driver, traf­fic, envi­ron­ment, clima­te, route and more.

Most of the data input for emis­si­on-rele­vant func­tions and on-board diagnostics happens on our state-of-the-art chas­sis dyna­mo­me­ter test benches. In addi­ti­on to veri­fy­ing compli­an­ce with legal regu­la­ti­ons for the respec­ti­ve coun­tries, statu­to­ry passen­ger car type testing in Euro­pe requi­res emis­si­on measu­re­ments under real driving condi­ti­ons. APL offers a truly holistic approach for this kind of testing: from indi­vi­du­al route selec­tion, through adap­t­ati­on and compa­ri­son of measu­re­ment tech­no­lo­gies, to data evalua­ti­on compli­ant with legal requi­re­ments. PEMS (Porta­ble Emis­si­ons Measu­re­ment System) measu­re­ment tech­no­lo­gies are also utili­sed during the deve­lo­p­ment phase to ensu­re reli­able data acquisition.

Due to the incre­a­sing degree of elec­tri­fi­ca­ti­on of vehi­cle drive trains and the digi­ti­sa­ti­on of vehi­cles, chas­sis dyno test-bench-ready proto­ty­pes are first avail­ab­le at a rela­tively late stage. In order to be able to carry out emis­si­on and consump­ti­on opti­mi­sa­ti­ons as early as possi­ble in the deve­lo­p­ment process, the APL drive train testing faci­li­ty offers high­ly sophisti­ca­ted test benches with corre­spon­ding measu­re­ment tech­no­lo­gy and tech­ni­cal equip­ment. In this envi­ron­ment, virtu­al compon­ents can be succes­si­ve­ly repla­ced by new hard­ware, thus enab­ling the enti­re, complex system to be deve­lo­ped to full produc­tion readiness.

Certi­fi­ca­ti­on and Confor­mi­ty of Production
Once emis­si­on and OBD data input is comple­te, the appro­val process can start in the vehi­cle. Various cycles must be success­ful­ly tested for certi­fi­ca­ti­on in compli­an­ce with the law; this inclu­des test cycles on the chas­sis dyna­mo­me­ter, such as NEDC, WLTC, WHTC, RDE, and other global­ly rele­vant cycles. In Euro­pe, PEMS measu­re­ments must also be carri­ed out to prove compli­an­ce with emis­si­on limits in real-world situations.

Post-CoP (Confor­mi­ty of Produc­tion) testing serves as both quali­ty assuran­ce and to deter­mi­ne produc­tion tole­ran­ces in assem­bly proces­ses. Confor­mi­ty of produc­tion must be demons­tra­ted for all confi­gu­ra­ti­ons and is inten­ded to ensu­re that every produ­ced vehi­cle conforms to the type approval.

Rela­ted Topics:

Deve­lo­p­ment of Inter­nal Combus­ti­on Engi­ne Drivetrains

Chemi­cal and Physi­cal Laboratory

// Loca­ti­ons 

Haupt­stand­ort Land­au
APL Auto­mo­bil-Prüf­tech­nik
Land­au GmbH
Am Hölzel 11
76829 Land­au


// Wolfs­burg
APL Auto­mo­bil-Prüf­tech­nik
Land­au GmbH
Gustav-Hertz-Stra­ße 10
38448 Wolfs­burg


// Bietig­heim-Bissin­gen
APL Auto­mo­bil-Prüf­tech­nik
Land­au GmbH
Robert-Bosch-Stra­ße 12
74321 Bietig­heim-Bissin­gen

// APL Group

APL Auto­mo­bil-Prüf­tech­nik Land­au GmbH

AIP GmbH & Co. KG

APS-tech­no­lo­gy GmbH

IAVF Antriebs­tech­nik GmbH

IAVF-Volke Prüf­zen­trum für Verbren­nungs­mo­to­ren GmbH