【正文】 ③ Cruise control。③ Chargeair pressure:④ Intake air, coolant temperature, and fuel temperature: ⑤ Airmass intake: ⑥ Road speed, electronic control unit evaluates the input sync with bustion, it calculates the triggering signals for the pressurecontrol valve or the metering unit, the injectors, and the other actuators( EGR valve, exhaustgas turbocharger actuators, etc.).The injector switching times, which need to be short, are achievable using the optimized highpressure switching valves and a special control angle/time system pares injection timing, based on data from the crankshaft and camshaft sensors, with the engine state(time control).The electronic diesel control(EDC)permits a precise metering of the injected fuel addition, EDC offers the potential for additional functions that can improve engine response and basic functions involve the precise control of dieselfuel injection timing and fuel quantity at the reference this way, they ensure that the diesel engine has low consumption and smooth running openand closeloop control functions perform the tasks of reducing exhaustgas emissions and fuel consumption, or providing added safely and examples are:① Control of exhaustgas recirculation。in future this will rise to 180 monrail system allows a future reduction in exhaustgas emissions by introducing preinjection events or multiple injection events and also attenuating bustion noise injection events of up to five per injection cycle can be generated by triggering the highly rapidaction switching valve several nozzleneedle closing action is hydraulically assisted to ensure that the end of injection is rapid.(5)Control and engine control unit detects the acceleratorpedal position and the current operating states of the engine and vehicle by means of data collected includes:① Crankshaft speed and angle。② The highpressure system, prising ponents such as the highpressure pump, fuelrail, injector, and highpressure fuel electronic diesel control(EDC), consisting of system modules, such as sensors, the electronic control unit, and key ponents of the monrail system are the are fitted with a rapidaction valve(solenoid valve or piezotriggered actuator)which opens and closes the permits control of the injection process for each the injectors are fed by a mon fuel rail, this being the origin of the term “mon rail”.In the monrail fuelinjection system, the function of pressure generation and fuel injection are injection pressure is generated independent of the engine speed and the injected fuel electronic diesel control(EDC)controls each of the ponents.(1)Pressure generation and fuel injection are separated by means of an accumulator under pressure is supplied to the accumulator volume of the monrail ready for continuously operating highpressure pump driven by the engine produces the desired injection in the fuel rail is maintained irrespective of engine speed or injected fuel to the almost uniform injection pattern, the highpressure pump design can be much smaller and its drivesystem torque can be lower than conventional fuelinjection results in a much lower load on the pump highpressure pump is a radialpiston mercial vehicles, an inline fuelinjection pump is sometimes fitted.(2)Pressure Control The pressure control m