Meeting cold-start emissions standards for particulate emissions and the criteria air
pollutants, NO, CO and unburned hydrocarbons (HC), is critical for gasoline direct-injection …

Reduction of CO2 emissions is a prevalent subject in the transportation sector. Cylinder
deactivation (CDA) provides a method to reduce CO2 emissions at part load. However, there …

In the next years, the upcoming emission legislations are expected to introduce further
restrictions on the admittable level of pollutants from vehicles measured on homologation …

In the process of cycle cylinder deactivation, the different proportion of cylinder deactivation
between adjacent working cycles will cause the problem of uneven operation of each …

Based on the self-developed hydraulic variable valve mechanism of four-cylinder engine,
this paper proposes a variable displacement valve control strategy based on the VOC-CDA …

Aiming at the problem of torque fluctuations and intake pressure fluctuations caused by
cycle cylinder deactivation, we introduced a refined control strategy encompassing fixed …

For vehicles with internal combustion engines, tailpipe emissions heavily rely on the
aftertreatment system, typically a catalytic converter. Modern three-way catalysts (TWC) can …

The upcoming emission legislations are expected to introduce further restrictions on the
admittable level of pollutants from vehicles measured on homologation cycles and real drive …

Abstract Pumping Mean Effective Pressure (PMEP) is the main factor limiting the
improvement of thermal efficiency in a spark-ignition (SI) engine under low load. One of the …