Emission Responses of China&nbsp;Ⅵ Heavy-Duty Diesel Engine under Different Test Cycles

TIAN Maojun; HUANG Dejun; TANG Bu; ZHANG Teng; XU Hui

Vehicle Engine ›› 2022, Vol. 0 ›› Issue (4) : 77-84.

Emission Responses of China Ⅵ Heavy-Duty Diesel Engine under Different Test Cycles

TIAN Maojun¹,HUANG Dejun¹,TANG Bu¹,ZHANG Teng²,XU Hui¹

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Abstract

The emission responses of a heavy-duty diesel engine were studied based on the China Ⅵ standard under different test cycles. According to the comparative analysis of original emission, exhaust emission, working condition and exhaust temperature under the steady-state and transient cycles, American EPA standard cycle and China standard cycle had similar assessment ability, and China cycle and the world harmonized cycle also had similar assessment ability. To a certain extent, LLC cycle could well assess the exhaust temperature rising and maintaining capacity of engine during longterm operation under low load and frequent switching between high and low load, which is a big challenge for the exhaust emission control capacity. A long time hot soak will lead to the lower exhaust temperature of hot start cycle, which is a challenge for the exhaust temperature retention capacity and hot start emission reduction of the posttreatment system.

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diesel engine / emission / test cycle

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TIAN Maojun,HUANG Dejun,TANG Bu,ZHANG Teng,XU Hui. Emission Responses of China Ⅵ Heavy-Duty Diesel Engine under Different Test Cycles[J]. Vehicle Engine. 2022, 0(4): 77-84