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  2. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

  3. GMC Envoy - Wikipedia

    en.wikipedia.org/wiki/GMC_Envoy

    GMC Envoy XL. From 2002 to 2006, GMC offered the extended-wheelbase Envoy XL SUV. Sixteen inches longer in wheelbase and length than the standard-length Envoy, the longer body of the XL was designed for third-row seating. To improve access and rear-seat room, the roofline over the third-row seat was raised (shrouded slightly with a standard ...

  4. Vacuum switch - Wikipedia

    en.wikipedia.org/wiki/Vacuum_switch

    The vacuum flowed through the switch to a vacuum solenoid (such as a heat riser, used to restrict exhaust allowing the engine to heat up faster). When the coolant heated to operating temperature the vacuum switch closed off the port (port S on the vacuum switch) turning off the vacuum to the heat riser. The result is to clear the exhaust ...

  5. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    The intake manifold vacuum, with wide open throttle, is lower in these conditions, which causes the PCV valve to open and the crankcase gases flow to the intake system. [13] The greater flow rate of intake air during these conditions means that a greater quantity of blow-by gases can be added to the intake system without compromising the ...

  6. General Motors Atlas engine - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Atlas_engine

    Atlas is a name for a family of modern inline piston engines for trucks from General Motors, used in the GMT355 and GMT360 platforms. The series debuted in 2002 with the Oldsmobile Bravada, and is also used in the Buick Rainier, the Chevrolet TrailBlazer and Colorado, the GMC Envoy and Canyon, the Hummer H3, Isuzu Ascender and i-370, and the Saab 9-7X.

  7. MAP sensor - Wikipedia

    en.wikipedia.org/wiki/MAP_sensor

    Thus, a MAP sensor will always read 100 kPa more than a boost sensor measuring the same conditions. A MAP sensor will never display a negative reading because it is measuring absolute pressure, where zero is the total absence of pressure. Vacuum is measured as a negative pressure relative to normal atmospheric pressure. Vacuum-Boost sensors can ...

  8. Engine control unit - Wikipedia

    en.wikipedia.org/wiki/Engine_control_unit

    Delco ECU used in General Motors vehicles built in 1996. An engine control unit (ECU), also called an engine control module (ECM), [1] is a device that controls various subsystems of an internal combustion engine.

  9. Vacuum cooling - Wikipedia

    en.wikipedia.org/wiki/Vacuum_cooling

    Vacuum cooling is generally used for cooling food products that have a high water content and large porosities, due to its efficacy in losing water from both within and outside the products. (Lettuce is an example of vacuum cooled products.) This is the most widely used technique for rapid cooling of food products which has been proven to be ...

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