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The electronic control type fuel injection system of basic working principle is: will fuel through the fuel supply device provide, and with the air supply device provide clean air mixed into conbuslible gases, into the cylinders again after the ignition system lit and finally eduction waste gas, the whole process is in the electronic control unit (ECU) monitoring coordination and complete. The four parts of the structure also is injection engine control most of the main parts, including any parts failure may be led to stall situations. Below we will through the structure of four parts, to learn about these together by fault caused by the stall.The engine in normal work, the first need to fuel oil supply system of fuel oil pump out of the fuel tank, fuel filter through into the fuel distribution lines, then the nozzle jet, the formation of oil-gas mixture of gases. In our consulting in understanding arrives, most of the stall phenomenon is the the first link appeared fault, let's start from the fuel supply problems about the system.Throttle function is through the adjustment of the size of the opening, control into the cylinder mixture of the quantity, image is the throat of the parable of the engine. Due to throttle open gap air flow is the largest, the space is little, gas temperature also bottom, this part is the most easy to condense impurities, so need according to a certain period on the clearing. If the throttle for impurities cause jams, and will lead to a lack of the subsystem and left idle instability. But if frequent cleaning throttle still can't completely solve the problem of the stall, generally all belong to the fault.In the mixture into the gas cylinder before, pass the intake manifold. In the natural air intake engine intake stroke, rely mainly on the vacuum degree in cylinder (also called the car DVD negative pressure) breathe air. When the intake pipe leakage existence, vacuum through small, cannot breathe enough gas to cause the engine is running and start difficult, idling instability, emissions are not the standard, and even die. When a vacuum leak performance for driving briefly in strong, so this kind of fault is easier to judgment.In addition, the air supply device other could lead to left the question is: air filter dirty and cause the engine intake not free, etc.But when the ECU more and more the burden in charge of monitoring vehicles state work, also brought some questions: when a sensor failure, ECU will not correct to the current status of judgment, and then take to stop oil spray protection measures, remove the happening of the situation in. In the sensors, the main failure occurs is the car cameras most likely cause of the left has: air flow sensor, throttle position sensor, oxygen sensor. Normally, these components is at fault, it is difficult to dispose of the owner, usually by the onboard computer records fault code, and then by the maintenance personnel for failure testing and maintenance.In addition, the electronic control system in other could lead to left the question is: connect the short circuit or open circuit, and the program design error. Article Tags: Electronic Control, Supply Device
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