Real World Cold Start Emissions from a Diesel Vehicle

Gaseous nitrous acid (HONO) and nitrogen oxides (NOx) emission from gasoline and diesel vehicles under real-world driving test cycles

“…Other reported causes include deterioration of the emission control system (e.g., exhaust gas circulation system), degradation of oxidation catalyst or particulate filter, and the test conditions (chassis dynamometer parameters, vehicle load) (Chen and Borken-Kleefeld, 2016;Carslaw et al, 2011;Yang et al, 2015;Kobayashi et al, 2008). Similar to the case of the tested gasoline vehicle, cold startup mode also elevated the levels of gaseous emissions from the tested diesel vehicle, which is in agreement with previous reports (Weiss et al, 2011;Alves, 2015;Windeatt et al, 2012).…”

Reduction of Low Temperature Engine Pollutants by Understanding the Exhaust Species Interactions in a Diesel Oxidation Catalyst

“…This classification justifies the ever tightening emission legislations imposed on diesel cars affecting the air pollution. The trend for this legislation is now to focus more on cold start and low to medium load emissions which can be produced in the urban environment when low vehicle speed, stop/start and idle phases are frequent [2]. It is also in these urban environments that humans are more exposed to vehicle exhaust gas.…”

“…The trend for this legislation is now to focus more on cold start and low to medium load emissions which can be produced in the urban environment when low vehicle speed, stop/start and idle phases are frequent. 2 It is also in these urban environments that humans are more exposed to vehicle exhaust gas. Several strategies have been developed in order to reduce the quantity of pollutants emitted to the atmosphere and among them is the use of the diesel oxidation catalyst (DOC) which oxidizes CO and HC to CO 2 and water before release to the atmosphere.…”

Design and Evaluation for Target Indicated Torque Based Engine Starting Control Strategy in a High Pressure Common Rail Diesel Engine

“…Misfire and low combustion efficiency always accompany diesel engine starting process [4,5] for the high blow-by level, the low engine speed, and the low engine block temperature [6,7]. As a result, emissions during the starting process, especially HC and CO emissions [8,9], play an important role in the engine emission performance [10,11]. And the diesel engine starting performance can be even poor, especially when it comes to the combustion efficiency [12], at the extremely low temperature [13,14].…”