However, by not using compressed air injection it is less efficient.

The main improvement is the modernized fuel and air injection system.

From 2001 to 2008, various combinations of pumping and air injection were used to control groundwater.

In 2001, a compressed air injection system was introduced.

Many political prisoners died under his notorious air injections.

In reverse the air injection and the ignition occur from opposite directions.

Since 2008, an expanded air injection system has been used alone to control and treat contaminants in groundwater.

One of the first-developed exhaust emission control systems is secondary air injection.

Partial combustion of the biomass products through air injection.

The most likely hypothesis, having ruled out virtually all natural causes that we know, is the very old method of air injection."

As well, the US-only models got the air injection system for emissions reduction.

The original air injection point became known as the upstream injection point.

Triumph added an air injection unit near the spark plug to achieve emission regulations introduced in 2007.

During bioventing, oxygen may be supplied through direct air injection into residual contamination in soil.

A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components.

Air injection can also be achieved by taking advantage of the negative pressure pulses in the exhaust system at engine idle.

This is a very new and experimental method that combines a vertical air injection well with a horizontal production well.

As a result of these changes the EGR and secondary air injection system were removed.

The valve overlaps have been removed and the two additional strokes using air injection provide for better gas scavenging.

Doctors often use air injections to fight TB strains that resist the most commonly used drugs.

A ban on the pre-slaughter practice of using air injections to the head intended to stun cattle before slaughter.

Also for 1999 provisions for a new air injection reaction system was introduced aimed at improving engine emissions.

After combustion zone reached to the bottom of retort, air injection was stopped to stop combustion.

As distance increases from the air injection point, what was initially a series of plugs gradually turns into a continuous airborne stream.

An air injection system injects fresh air into the exhaust port, to meet the emission norms.