This eliminates the need for an external air pump or complex EGR system (due to the availability of
internal EGR).
The resulting
internal EGR from high valve overlap tends to reduce engine stability at very light load (e.g. idle).
Internal EGR - Re-open the intake or exhaust valves to generate internal Exhaust Gas Re-Circulation.
The benefits from
internal EGR are two-fold: Firstly,
internal EGR benefits part load fuel economy by diluting the charge within the cylinder, thus restricting output without the need for increased throttling and its associated pumping losses.
Ti - VCT also facilitates an «
internal EGR» effect, reducing NOx and hydrocarbon emissions throughout the engine's operating range.
Not exact matches
Emissions: all use at least one three - way catalytic converter, quad - heated oxygen sensors,
EGR, and
internal engine features.
This ensures the appropriate, effective compression ratio and efficient
internal exhaust - gas recirculation (
EGR) for improved fuel economy.