Driveline Backlash Identification and Torsional Defects Detection Using Torque Signatures Analysis for an IC Engine Cold Test Stand

Tailony, Rauf; Nikolaidis, Efstratios

doi:10.1007/s11668-017-0361-9

Cited by 4 publications

(1 citation statement)

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“…Parameters such as the output torque, breakaway torque, valves pressure, engine block vibrations, and engine horsepower are tested using a cold test station. Other parameters such as the pressure drop and fluid flow rate are tested using a leak test or power line test station [4,5]. Computer-Aided Software (CAD) is an efficient tool for optimizing the production design and calculating the expected throughput based on the current plant's parameters and design aspects using simulators, Statistical analysis, and lean optimization.…”

Section: Introductionmentioning

confidence: 99%

Time-Based Factory Efficiency Analysis | I.C. Engine Assembly Line

Tailony

2021

Preprint

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Cold test stations are commonly arranged as sequential processes along a complete engine production line. The production line consists of several stations for engine building purposes, and before the engine exits the production line it passes through different validation and testing stations, such as leak testing stations, piston protrusion stations (known as torque to turn stations), and cold test stations. Each of these stations has a sequence of operation that is performed automatically or semi-automatic with the support of an operator. The waiting time until the engine finishes the operation in one station is called “cycle time”. The longer the cycle time the less efficient the production line. Cold testing stations are considered the most complicated and time-consuming, yet important test stations for engine and powertrain development. The lengthy cycle time affects the overall efficiency of the production line. This paper investigates the problem of the cycle time difference between consequent stations and its effect on the overall efficiency of the factory. New techniques and operations research methods are introduced aiming to recover from such a manufacturing obstacle. This research is investigating the limitations of a manufacturing operation standpoint. Each test station is treated as a block that simulates the actual station, and the overall factory workflow is described. Time-based equations governing block time, idling time, and utilization of the system are introduced, and the factory efficiencies are calculated and compared. After identifying the problem, a practical solution is explained.

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Section: Introductionmentioning

confidence: 99%