In addition to the high-tension cable leads, the system has four main components: a manifold pressure
sensor, direct-fire coil pack, electronic control unit and a mag timing housing.
The reduction in altitude to 350 m above sea level, which corresponds to the increase of apparent barometric pressure, was simulated with increasing the inlet manifold pressure
of the engine by using a three-lobe rotary blower of the Roots type.
The simulation models for the intake manifold as a differential equation for the manifold pressure
. The difference in the incoming and outgoing mass flow rates represents the net rate of change of air mass with respect to time.
The relatively low manifold pressure
drop with the Original design with small plenums and no plate was the result of the large area for the first distributor, 1/3rd of the inlet manifold area, Equation (2).
One that held a great deal of promise made use of an extra sensor not normally included in production cars that monitored exhaust manifold pressure
Tomorrow's lightplanes will all employ a single, simple power control - as easy to use as a car's accelerator pedal - rather than the current complex system of separate levers to adjust manifold pressure
, fuel mixture, propeller speed, and, in some cases, turbocharger boost.
Pressure sensors -- which consist of silicon membranes etched so thin that changes in external pressure result in changes in the membranes' easily monitored electrical resistance -- now keep track of blood pressure in human patients and manifold pressure
in millions kf cars.
, which we use to help set power when flying an airplane with a constant-speed prop, actually should be called manifold vacuum, because that's really what's being measured: how much air is being sucked into the engine's cylinders.
In a similar way, the Electroair system is a tuned ignition system--based around manifold pressure