How does an air injection system work?
Secondary air injection systems pump outside air into the exhaust stream so unburned fuel can be burned. Newer aspirated systems use the vacuum created by an exhaust pulse to pull air into the pipe. The latest systems use an electric motor to pump air. These systems are critical for the life of the catalytic converter.
How does the air injection system work in a car?
During deceleration the diverter valve blocks air flow, preventing a backfire that could damage the exhaust system. When needed, the diverter valve will release excess pressure to the air cleaner. Pulse Type – As exhaust gases travel down the exhaust passages, the vacuum created draw fresh oxygen into the air injection system.
How does the Mazda Skyactitv-D fuel injector work?
Mazda resolved this in the Skyactitv-D by using piezoelectric fuel injectors with multiple nozzles that changes the pattern depending on operating conditions. Furthermore, exhaust valves are left slightly open as the engine starts causing exhaust gases to be sucked into the cylinders helping the engine to warm up quickly.
How does an air injection system smog pump work?
Air Injection System & Smog Pump. The air injection system (AIS) is designed to introduce clean air to the engine exhaust as it exits the exhaust manifold or exhaust headers. Exhaust gases are at their hottest as they leave the combustion chambers.
How does the Mazda Skyactiv X compression ignition engine work?
It’s a small Roots-type blower that is disengaged with a clutch when not needed, reducing parasitic losses. In a conventional supercharged engine, more fuel is added to burn with the additional air, giving a small engine the lungs of a much bigger one. In the X, it’s only there to add air, further leaning out the mixture.
During deceleration the diverter valve blocks air flow, preventing a backfire that could damage the exhaust system. When needed, the diverter valve will release excess pressure to the air cleaner. Pulse Type – As exhaust gases travel down the exhaust passages, the vacuum created draw fresh oxygen into the air injection system.
What kind of injector does a Mazda Skyactiv use?
The newly adopted multi-hole piezo injectors allow for a wide variety of injection patterns. Precision in injection amount and timing increases the accuracy of mixture concentration control, ensuring cold-start capability. Hardware-wise, the injector is a high-spec type capable of a maximum of 9 injections per combustion.
When did Mazda start using direct injection in cars?
Simple: rev the crap out of your engine. No, seriously. Mazda was one of the first auto manufacturers to put direct injection into mainstream (read:economy) cars back in 2005 with the 2.3L DISI engine. They’ve been messing with DI for awhile and so they were obviously aware of the issue when designing the Skyactiv-G engines.
Air Injection System & Smog Pump. The air injection system (AIS) is designed to introduce clean air to the engine exhaust as it exits the exhaust manifold or exhaust headers. Exhaust gases are at their hottest as they leave the combustion chambers.