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Open Access Publications from the University of California

Scholarly Works (22 results)

  • Article
Research Reports (2022)

Contribution of brake particle emissions to ambient PM2.5 is increasing. Previous studies focused on determination of brake emission rate from lab testing and so it lacks brake activity of real world conditions. The study aimed to establish a test method to determine brake activity of a heavy-duty vehicle. Brake parameters and vehicle parameters were measured during two chassis cycles and two on-road test tests. Brake activity was quantified with brake pressure signal as the first indicator and vehicle speed as the second indicator. Temperature increase was related to the kinetic loss of the vehicle and cooling and heating of brake pad was repeated during on road test. Resulting brake activity was presented in the form of histogram. Future test should use shorter copper cap for thermocouple to better sense friction surface temperature. It is recommended to measure both activity and emissions during on-road test so that a better relationship can be established between brake activity and brake particle emissions.

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    Cover page: Real World Brake Activity of Heavy-Duty Vehicles
    • Article
    • Peer Reviewed
    2016 Publications (2016)
      Cover page: Application of low-level biodiesel blends on heavy-duty (diesel) engines: Feedstock implications on NO x and particulate emissions
      • Article
      • Peer Reviewed
      2020 Publications (2020)
        Cover page: Impacts of Exhaust Transfer System Contamination on Particulate Matter Measurements
        • Article
        • Peer Reviewed
        Previously Published Works (2013)
          Cover page: Impact of natural gas fuel composition on criteria, toxic, and particle emissions from transit buses equipped with lean burn and stoichiometric engines
          • Article
          • Peer Reviewed
          2018 Publications (2018)
            Cover page: Characterizing emission rates of regulated pollutants from model year 2012 heavy-duty diesel vehicles equipped with DPF and SCR systems
            • Article
            • Peer Reviewed
            Previously Published Works (2014)
              Cover page: Impacts of biodiesel feedstock and additives on criteria emissions from a heavy-duty engine
              • Article
              • Peer Reviewed
              Previously Published Works (2015)
                Cover page: The impact of ethanol and iso-butanol blends on gaseous and particulate emissions from two passenger cars equipped with spray-guided and wall-guided direct injection SI (spark ignition) engines
                • Article
                • Peer Reviewed
                2016 Publications (2016)
                  Cover page: Regulated, greenhouse gas, and particulate emissions from lean-burn and stoichiometric natural gas heavy-duty vehicles on different fuel compositions
                  • Article
                  • Peer Reviewed
                  2016 Publications (2016)
                    Cover page: Impacts of dimethyl carbonate blends on gaseous and particulate emissions from a heavy-duty diesel engine
                    • Article
                    • Peer Reviewed
                    2018 Publications (2018)
                      Cover page: Investigation of the Effect of Mid- And High-Level Ethanol Blends on the Particulate and the Mobile Source Air Toxic Emissions from a Gasoline Direct Injection Flex Fuel Vehicle
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