The elimination of cams, lifters, rockers, and timing set reduces not only weight and bulk, but also friction. BMW attempted to get around this on their V-10 powered M5, which had individual throttle butterflies for each cylinder, placed just before the intake valves. The development of integrated circuits and microprocessors made engine control economically feasible in the 1970s. I mean officially, the part number changes with each update even though the pcm hasn't been replaced. Meaning of ECU. This process is often carried out at an engine performance facility. The first letter (either P, B, C, or U), informs the reader of the system being affected by the problem. Those are manufacturing numbers actual ECM number can be down loaded if the ECM powers up. The ECU shuffles through the tons of data that come to it in the form of readings to decide the course of action that should be taken by the engine to ensure an ideal drive. In most cases, you will see a “P” that indicates a powertain issue, which includes a vehicle’s engine, emission, and … The disadvantage of such systems is that the precomputed values are only optimal for an idealised, new engine. I have changed the bulb to no avail. The second digit "0" typically means manual transmission, where a "5" means automatic transmission, and the last digit "1" is the version number. Full throttle is achieved when the gas pedal is depressed, sending an electronic signal to the ECU, which in turn regulates the lift of each valve event, and opens it all the way up. on my ECU, the first box at the bottom that says 'MEC11-210' is the same as the image. The higher the number, the larger the wick. The Free Dictionary. Most units that you pull from your vehicle will have a white sticker on them with the part number and multiple identifier numbers which can make it unclear when trying to locate the part number for your ECU. Many foodservice businesses are interested in recycling the plastic bags and containers they use to store, prepare, and keep their food fresh. General Motors' (GM) first ECUs had a small application of hybrid digital ECUs as a pilot program in 1979, but by 1980, all active programs were using microprocessor based systems. The valves can open several times per intake stroke, based on engine load. The ROM type of system is amenable to tuning if one knows the system well. Information is then relayed through the Data Link interface that usually located on the underneath of the steering column. Under a sudden increase in throttle, the valve opens in the same intake stroke and a greater amount of fuel is injected. The data logger usually has a capacity between 0.5 and 16 megabytes. Sensors for air flow, pressure, temperature, speed, exhaust oxygen, * knock and crank angle position sensor makes a very vital impact in EEMS. Experimental engines have been made and tested that have no camshaft, but have full electronic control of the intake and exhaust valve opening, valve closing and area of the valve opening. Early carburetor-based systems used a programmable throttle stop using a bidirectional DC motor. FR: (Computer Monitor) For early Japanese alternators – this is a variable output of between 0V and 11V. Cylinder deactivation, for instance, could be made much more fuel efficient if the intake valve could be opened on every downstroke and the exhaust valve opened on every upstroke of the deactivated cylinder or "dead hole". Idle speed is controlled by a programmable throttle stop or an idle air bypass control stepper motor. I have a Nissan Versa note 2015 car issue. The valves are usually opened sooner at higher speed than at lower speed. See the image on the link below to help me explain the numbers. As the engine wears, the system may be less able to compensate compared to other designs. 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