Study on estimation method of vehicle NOx PM CO 2 emissions factors applicable to local roadside

Mio Tanaka, Yutaka Takada, Norifumi Takada, Norimasa Iida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


An estimation method is proposed to study the vehicle NO x PM CO 2 emissions factors. The estimation model using vehicle speed and vehicle power, is made with real world emissions data observed from an on-board measurement system. The on-board measurement system in the test vehicle measures vehicle positions by GPS, pictures of road infrastructures, traffic conditions, driver's operations, engine and vehicle dynamics, and NO x,PM, CO 2 emissions every 0.5 second. The PM emission is measured by smoke-meter using opacity method. Emissions per distance are obtained from emissions per driving time divided by a vehicle speed. Emissions per distance are employed as indexes of the pollution at roadside. Vehicle power includes vehicle weight, acceleration, and road grade, and are found to affect emission factors. Vehicle power (VP) model can estimate the local roadside emissions with higher accuracy as compared to Vehicle speed model.

Original languageEnglish
Pages (from-to)347-349
Number of pages3
JournalReview of Automotive Engineering
Issue number2
Publication statusPublished - 2006 Apr 1

ASJC Scopus subject areas

  • Automotive Engineering


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