Development Of A Portable Engine Fault Detector Without Engine Disassembly

The engine which is the automobile key component, the automobile some basic technical performance all directly or indirectly relates the engine performance. After vehicle engine movement certain course, the piston group attrition is serious, the machine oil, the fuel oil consumption increases, the engine overall performance drops, must carry on the overhaul to the engine. The traditional determination engine carries on the overhaul the standard is determines between the piston curl and the cylinder wall gap took the overhaul the basis (different engine gap standard is different, for example EQ6100 engine overhaul gap for 15μm), therefore must first carry on the disintegration to the engine, after but surveys between the piston curl and the cylinder wall gap, thus determines the engine whether needs the overhaul. This requests the repair shop technical worker to have to dismantle the engine from the vehicle, carries on the disintegration to the engine, between the survey piston curl and the cylinder wall gap, the efficiency is low.This article introduced the local train does not disintegrate with the engine the breakdown to diagnose the instrument the design, in view of the vehicle with the engine unique feature, has designed the special-purpose test sensor, had pointed out the sensor use scope, has determined its characteristic curve through the experiment, and to affected the measuring error the factor to carry on the analysis, realized the automobile leak-proof through the artificial neural networks intelligence technology with the internal combustion engine cylinder wearing capacity, the piston curl has not disintegrated the breakdown diagnosis. The instrument design separately from reduces the power loss and uses new, the high accuracy A/D switch obtaining optimization instrument design.Is reducing the power loss aspect: The microprocessor uses SOC chip MSP430FXXX, The demonstration part uses the belt Chinese fonts the GXM16032 micro power loss liquid-crystal display, the periphery electric circuit uses the corresponding low power loss chip, reduced the instrument power loss, may realize the instrumentation portable assembly, the adaptation now the instrument development tidal current—The green instrument, facilitated examined the scene operation .