Automatic Performance Control (APC) is a system that was introduced on turbo chargedSaab H engines in 1982. APC is an abbreviation of: A Perfect Circle, a rock band with frontman Maynard James Keenan. ... Turbocharger Cut-away A turbocharger is a device used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. ... The Saab H engine is a redesign of the Saab B engine. ... 1982 is a number and represents a common year starting on Friday of the Gregorian calendar Events January-February January 6 - William Bonin is convicted of being the freeway killer. January 8 - AT&T agrees to divest itself of twenty-two subdivisions January 11 - Mark Thatcher, son of the British...
1. knock sensor 2. pressure transducer 3. control unit 4. solenoid valve
APC is a knock-sensing system which allowed a much higher compression ratio (9:1 as opposed to 7.2:1) and boosted performance from 145 hp (108 kW) to 155 hp (116 kW). This system also produced 20% better fuel economy and allowed the use of low-octane petrol without causing engine damage. Knocking (also called pinking or pinging)—technically detonation— in internal combustion engines occurs when fuel in the cylinder is ignited by the firing of the spark plug but burns too quickly, combusting completely before the optimum moment during the compression phase of the four-stroke cycle. ... The compression ratio is a single number that can be used to predict the performance of any internal-combustion engine. ... Fuel efficiency, sometimes also referred to as fuel economy and commonly gas mileage in the United States, is a numeric measure often used to describe the amount of fuel consumed with regard to the distance travelled in a transportation vehicle, such as an automobile. ... Petrol pumps in Germany Petrol (commonly known as gasoline in North America, and sometimes also called motor spirit) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ...
A knock sensor (basically a microphone) detects engine knocking and sends its signal to a control unit. The control unit combines this signal with the engine RPM and inlet manifoldpressure. In case of knocking, the control unit drives a solenoid valve that opens a wastegate to bypass exhaust gases from the turbocharger, lowering turbo boost pressure to a safe level. A sensor is a technological device or biological organ that detects, or senses, a signal or physical condition. ... A microphone with a cord A microphone, sometimes called a mic (pronounced mike), is a device that converts sound into an electrical signal. ... For the Rise Against album, see Revolutions Per Minute (album). ... In automotive engineering, an intake manifold or inlet manifold is a part of an engine that supplies the fuel/air mixture to the cylinders. ... Pressure (symbol: p or P) is the measure of the force that acts on a unit area. ... A Boost in automotive engineering is a positive manifold pressure in cars with turbochargers or superchargers. ...
The AGC circuit keeps the receiver in its linear operating range by measuring the overall strength of the signal and automatically adjusting the gain of the receiver to maintain a constant level of output.
It is usually advantageous to reduce the gain of the front end of the receiver, which has benefits for both the amount of noise in the signal, and performance in the presence of strong signals, such as blocking rejection.
Video copy control schemes such as Macrovision exploit this, inserting signal spikes which will be ignored by most televisions but cause the deck's AGC to overcorrect and corrupt the recording.
The automaticcontrol would replace an unreliable, inflexible, and crudely calibrated mechanical clock timer on the circulation pump, and allow me to use a steady feed of inexpensive liquid chlorinating solution instead of manual doses of more expensive products.
While the split-second precision thus achieved is overkill for the pool controls, it is critical that the system have a reliable standard-time clock to maintain predictable synchrony with the governing solar events.
Water level control, using an improvised capacitance-based level sensor as described in the Basic-stamp technical notes, and a solenoid valve and flow-sensor fitted to the potable water supply (no longer a priority after I discovered and fixed a leak in the pool; now I hardly ever need to add make-up water).
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