exhaust stroke


Also found in: Encyclopedia, Wikipedia.

exhaust stroke

n
(Mechanical Engineering) another name for scavenge stroke
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Multi-cylinder engines are straightforward to turbocharge since the engine cycle can be timed such that when one cylinder is going through the exhaust stroke (powering the turbocharger), another cylinder is intaking [1, 10].
The location along the x-axis for the new exhaust valve opening was initially arbitrary as long as it was after the exhaust valve opening during the exhaust stroke. After running the simulation with the additional opening, the maximum cylinder pressure was compared to CR10 (single exhaust valve opening).
The exhaust stroke of the four-stroke cycle is partly responsible for this, but it works against atmospheric pressure, which in turn is acting in the reverse direction to exhaust flow.
To achieve full scavenging and the air intake cycle in this short section of the exhaust stroke may seem difficult, but the intake cycle in a normal engine has a pressure difference of 14.5psi, dropping to zero at the end of the stroke, while in this case there is a near-constant pressure difference in a petrol engine of 109psi producing the air flow.
"On the exhaust stroke, the valve opens more and a weight inside the engine lifts to let exhaust gasses escape.
Integral electronic cycle counters monitor pump performance, and vent assist valves release pressure in pump body during exhaust stroke for accelerated filling and overall cycling.
These terms come from the fact that the system fires two plugs at the same time, one on the compression stroke and one on the exhaust stroke. Since firing a plug into the exhaust stroke accomplishes exactly nothing, it's called a "lost spark." It does, however, make the system easier to design and manufacture, and costs little in the way of electricity.
As the residual swirl of the flow in the cylinder at the end of the exhaust stroke was not taken into account, the flow was supposed to be quiescent initially.
During exhaust stroke, piston moves up the cylinder bore, decreasing the total chamber volume.
This allowed a precisely calculated quantity of fuel to be accurately injected as a late post-injection during the engine's exhaust stroke. Since this fuel does not burn in the engine, it was passed to the DOC--where the carbon in the fuel undergoes catalytic oxidation--lowering the soot oxidation temperature in the downstream DPF to a level permitting auto-regeneration.
While the heat is less, the fuel/air mixture continues to burn as it moves through the exhaust port during the exhaust stroke.
The intake valve can be opened briefly during the exhaust stroke, the exhaust valve can be opened slightly during the Intake stroke, or exhaust can be recycled by simply postponing the exhaust valve closing.