Real-time monitoring device for single injection fault of electronic control injector and common rail system test bed

Abstract

The invention provides a real-time monitoring device for a single injection fault of an electronic control oil injector and a common rail system test bed. The real-time monitoring device comprises anoil injector adaptation device 12, a pressure measurement assembly, an oil return flow channel assembly and data acquisition equipment. Through comprehensive matching of multiple devices including a first throttling hole, a first oil return flow channel, a bag type energy accumulator, an oil rail and a second throttling hole, the measured mist dispersal volume pressure is stabilized at a reasonable level value and a reasonable fluctuation range. Through real-time measurement of the injection rear-end pressure, real-time monitoring of typical injection indexes of the electronic control oil injector is achieved, and then injection fault monitoring of the electronic control oil injector is achieved.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a real-time monitoring device for a single injection failure of an electronically controlled fuel injector and a test bench for a common rail system. Background technique [0002] As the final executive device of the entire common rail system, the electronically controlled fuel injector is also one of the most core components of the fuel supply system. Its function is to inject diesel fuel at a certain pressure, fuel injection pattern and spray characteristics at regular intervals and quantitatively according to the requirements of the diesel engine mixture. The injection is directed to a specific part of the combustion chamber. The opening process time and closing process time of the needle valve determine the proportion of the rising and falling sections of the fuel injection rate, which affects the effective average fuel injection rate in the continuous period. The delay of ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the platform testing of electronically controlled injectors, especially in the process of platform durability testing, indirect monitoring such as the current signal of the electromagnetic valve of the electronically controlled injector, the pressure signal of the common rail pipe, etc., or the method of periodic performance retesting are generally used to monitor the injectors. Performance index changes, unable to realize real-time, single injection fault location and monitoring

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