Sentences with phrase «exhaust pressure waves»

And it has dual variable valve timing while the next - generation turbocharger optimises the use of exhaust pressure waves to increase torque at low speeds.

This enables more efficient use to be made of the exhaust pressure waves to drive the turbocharger, so in typical BMW fashion the engine responds instantly to any movement of the throttle.

Not exact matches

One of the goals of a performance exhaust is usually to create a tuned system: A tuned exhaust system is an exhaust system for an internal combustion engine which improves its efficiency by using precise geometry to reflect the pressure waves from the...

There is this nice animation of a 2 - stroke engine with an expansion chamber Source It works like this: While moving downwards after ignition, the piston exposes the exhaust opening, and the burned gas streams into the exhaust pipe like a (high pressure) shock wave.

As the upstroke happens the pressure in the cylinder is now low because the escaping exhaust gases cause a small pressure wave of escaping gas that now opens the reed value and draws in new fuel / air mixture.

Likely more fresh mixture will be drawn through to the exhaust, before pressure waves push this mixture back in to the engine.

A tuned exhaust system is an exhaust system for an internal combustion engine which improves its efficiency by using precise geometry to reflect the pressure waves from the exhaust valve or port back to the valve or port at a particular time in the cycle.

In addition, it includes a pulse convertor exhaust that works by using pressure waves to enhance the torque at lower engine speeds.

A valve in the mixing tube, downstream of the underfloor catalytic converters, closes immediately when six of the twelve cylinders are shut off to prevent higher pressure waves occurring in the exhaust system.