manifold pressure


Also found in: Acronyms.

manifold pressure

[′man·ə‚fōld ‚presh·ər]
(mechanical engineering)
The pressure in the intake manifold of an internal combustion engine.

manifold pressure

The absolute pressure in the intake manifold of a reciprocating engine. It is the pressure at which the fuel-air mixture is forced into cylinders and is equal to the atmospheric pressure plus a boost less friction losses in the manifold less the pressure drop across the throttle valve. It is indicated by a manifold absolute pressure (MAP) gauge. It may be an indicator of a throttle setting and power output if the RPM is constant.
References in periodicals archive ?
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.
Manifold pressure, 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.
Dynamic in-cylinder pressure and intake manifold pressure values were acquired through a 16 bit analog module.
Limited Tenders are invited for Purchase Of Oil Supply Unit Manifold Pressure Redducing Valve
intake and intake manifold pressure, intake manifold temperature and exhaust gas pressure) dynamically over time or crank angle.