![]() ![]() On the left, the injector injects the correct amount. This parameter, together with the injection time, determines the amount of the injected fluid. On the left an injector that pulverizes exactly on time, on the right an injector that responds with a delay.įor each chatter, at constant pressure DIT31 calculates the difference between the level of pressure on opening and closing of the nozzle. ![]() Injection time is the time elapsed between the opening and closing of the nozzle. Opening delay is the time to translate the electrical command into a mechanical movement ![]() ![]() The injector on the left has an acceptable quantity of return the other one on the right has an extra internal leakage. Known the acceptable leckage time, any lower value indicates a too high back leackage. With the injector pressurized, the pump is stopped and the pressure drops gradually, depending on the return. Piezoelectric actuator control requires the additional CRP module to the unit TC38.Īctivated the automatic triggering cycle, it is easy to find the minimum pressure which allows the chatter.Īctivated the automatic triggering cycle, it is easy to find the minimum pressure which allows the chatter pressure difference during the injection time the time interval between opening and closing of the nozzle (injection time). Determining the influence of various sensors on the different actuators.The most popular method to measure the flow of a common rail injector is to collect in a graduated glass the amount of liquid introduced during a known number of injections and compare this volume with the graduation of the container.Īn alternative able to provide higher resolution, is to split the flow in its two fundamental physical parameters: that is,.Verification of the actuators - with multimeter and oscilloscope: supply voltage, control signals, duty cycle, component testing.Verification of the sensors - with multimeter and oscilloscope: power supply, signals, component testing.Verification of the power supply side plus and minus side.Making screen-shots of all signals, all control voltages and the CAN data-bus with a digital oscilloscope and storing them for customer-specific documentations.Measuring and assessing sensor signals and actuator control voltages, recording CAN-bus signals with the oscilloscope and assessing signal levels.Using common OBD diagnostic tools for the workshop.Determining reference values depending on operating situation.Working with original schematics and specify problem-oriented connector pins on components and control unit.TDI injection technology: Naming components of the entire engine management system and explain their interaction.Compact device build, mobile, for lab and workshop practice.Connection for student circuit diagram measuring desks.Arrangement in the IPO principle: input - processing - output.Measuring of all relevant parts and components in the central circuit diagram measuring field.Original parts, Original injection pressures.This means the system can be put into operation immediately upon setup. The required power supply, wiring and component configuration are already integrated into the system and preset, ready for operation. All original parts and required components are clearly arranged in the IPO-principle on the color printed front panel. With this teaching and training rig all functions and processes, errors and measuring values can be demonstrated and examined without emissions as they are in the original engine. ![]()
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