With precise control of fuel volume delivery at high pressure, fuel consumption can also be dramatically reduced. It is designed to inject the fuel at high pressure at precisely the right moment, while also accurately metering the quantity of fuel injected in order to create the conditions required for lowemission combustion inside the cylinder. If necessary, mtu introduces a second phase of emission control whereby remaining harmful emissions are removed by exhaust aftertreatment systems.Īs part of the internal engine enhancements, one of the major means of control for obtaining clean fuel combustion, besides exhaust gas recirculation, is the fuel injection system. Fuel combustion inside the engine is improved so that, if at all possible, emissions are not produced in the first place. For these reasons, mtu primarily pursues a policy of reducing emissions by internal engine enhancements. Exhaust after treat-ment systems such as SCR catalytic converters (selective catalytic reduction, short: SCR) or diesel particulate filters are one way of lowering emissions, but also have a greater space requirement and potentially increase the engine’s maintenance needs. At the same time, customers are constantly calling for more economical engines. Pioneer of the common rail fuel injection system The emissions regulations for diesel engines in applications such as ships, trains and heavyduty off-road vehicles and gensets worldwide are becoming more stringent and make extensive modifications to the power units necessary.
#FUEL INJECTION SYSTEM PPT FREE DOWNLOAD SERIES#
In 1996, with the Series 4000 engine, mtu was the first manufacturer of large diesel engines to introduce common rail fuel injection as a standard feature. The electronic control system ensures that the start of injection, the quantity and time are independent of the engine speed. Fuel is injected into the combustion chamber from a common rail under high pressure. PCM will retard spark when detonation is detected.With common rail fuel injection, the combustion process can be optimized to achieve low pollutant levels combined with lower fuel consumption.Senses detonation which the engine is running.Measure the amount of oxygen in the exhaust stream.achieving the precise control of the A/F ratio.Works like CTS -measures - temperature of intake air.
Pulses timed by crankshaft sensor (CKPS).The computer grounds the injector to turn it “pulse” - “Pulse width”.Computer triggers valve with electrical signal called a pulse.holds pressure against e injector’s valve.Some are mechanical but newer cars use an electronic system.Pressure adjusted for changes in intake manifold vacuum.Pressure regulator controls the pressure to injectors.The rail - pipe that fills the injectors.Electronic Parts Computer (PCM) - logic device.Actuators : output devices the computer operates. 1958 Corvette 1st fuel injection (Manual)Įlectronic Parts Computer (PCM): logic device.
0 kommentar(er)
