and exhaust. Combustion pushes the pistons down from the top of the cylinder. As engines need air to burn fuel, during intake, valves open up and allow ambient air to come in. When the piston reaches ...

All four phases occur within a single cycle of the rotor, rather than one at a time in a four-stroke piston engine. There is also no need for a minimum of two valves (intake and exhaust ...

Some engines, however, take advantage of squeezing in a few more parts where they can. One area where this is seen often is in extra intake and exhaust valves. Why does it matter if you have ...

Intake, Compression, Power, and Exhaust. The Knight sleeve valve engine used the four-stroke Otto-cycle system present in most modern vehicle engines. Starting with the piston at the top of the ...

Cylinder head valves normally will not just bend unless the engine has experienced some ... piece and pressing it up against either the intake or exhaust port to achieve an airtight seal.

With LS engines, however ... That, they say, is the culprit behind failures of both intake and exhaust valves, not the valves themselves. For the purposes of this article, we'll be focusing ...

If all engines were built with a straight shot ... RPM Oldsmobile head with a 30-degree back cut on both the intake and exhaust valves. The Olds' exhaust port did not respond to this modification ...

he takes a failed engine design and musters up the oomph to get it running. The whole build began with an idea for a different kind of intake and exhaust valve. [Meanwhile In the Garage] dreamed ...

called for 0.020 inch of clearance (on a hot engine) on both the intake and exhaust valves. The hot spec is the most critical measurement because the engine components can fluctuate in size as ...

T hough it's been called many things, the VTEC acronym stands for Variable Valve Timing and Lift Electronic Control. VVTLEC ...

A cylinder head with three intake and two exhaust valves could bring benefits in volumetric efficiency—how much air and fuel an engine takes in on an intake stroke—compared with a traditional ...

Intake valves open and close to let the air-fuel mixture (or just air in some modern engines) enter the cylinders, and the exhaust valves allow exhaust gases to escape. Too much or too little ...