A methodology for non-invasive diagnosis of diesel engines through characteristics of starter system performance

Alzate, Juan David Ramírez; Piedrahita, Carlos Alberto Romero; Hernández, Juan Camilo Mejía; Riaza, Héctor Fabio Quintero

doi:10.29354/diag/147789

Cited by 2 publications

(4 citation statements)

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“…Other studies have investigated the effect of different load conditions, such as varying temperature, engine speed, and battery capacity. However, few studies have directly compared the accuracy of oscilloscope measurement with engine control unit measurement, which is a common method used by automotive manufacturers and repair shops [1,2,[4][5][6][7][8]. The pie chart shows the percentage portion of failures of the different components: Engine (41%), Drivetrain (26%), Suspension (13%), Steering (7%), Chassis/Body (7%), Braking System (3%), Hydraulics (3%).…”

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

“…The battery voltage of a car can indicate possible engine failures as the course of the voltage during the starting process displays the engine's compression [2]. The measurement of the battery voltage is simple and it can be performed without disassembly or any special measuring clamps or connectors.…”

Section: Introductionmentioning

confidence: 99%

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Voltage Signals Measured Directly at the Battery and via On-Board Diagnostics: A Comparison

Kortenbruck,

Jakubczyk,

Nowak

2023

Vehicles

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Nowadays, cars are an essential part of daily life, and failures, especially of the engine, need to be avoided. Here, we used the determination of the battery voltage as a reference measurement to determine possible malfunctions. Thereby, we compared the use of a digital oscilloscope with the direct measurement of the battery voltage via the electronic control unit. The two devices were evaluated based on criteria such as price, sampling rate, parallel measurements, simplicity, and technical understanding required. Results showed that the oscilloscope (Picoscope 3204D MSO) is more suitable for complex measurements due to its higher sampling rate, accuracy, and versatility. The on-board diagnostics (VCDS HEX-V2) is more accessible to non-professionals, but it is limited in its capabilities. We found that the use of an oscilloscope, specifically the Picoscope, is preferable to measure battery voltage during the engine start-up process, as it provides more accurate and reliable results. However, further investigation is required to analyse numerous influences on the cranking process and the final decision for the appropriate measurement device is case specific.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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Voltage Signals Measured Directly at the Battery and via On-Board Diagnostics: A Comparison

Kortenbruck,

Jakubczyk,

Nowak

2023

Vehicles

View full text Add to dashboard Cite

show abstract

“…Despite the efforts to promote the wide usage of electric cars, the majority of modern cars are still powered by internal combustion engines [11]. Internal combustion engines are also used in agricultural machinery, ships, airplanes, and rail transportation, making vehicle fuel consumption the largest contributor to energy consumption in the transportation sector [5,18]. Therefore, efforts are being made to improve internal combustion engines [8,12,15,17].…”

Section: Introductionmentioning

confidence: 99%

Diagnosing the thermostat using vehicle on-board diagnostic (OBD) data

Witaszek,

Witaszek

2023

Diagnostyka

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The thermostat is a crucial component of a car's internal combustion engine's cooling system. Failure of the thermostat can result in undercooling or overheating of the engine. Undercooling may increase wear of engine components due to poor lubrication and lead to higher fuel consumption. Conversely, overheating can damage the engine. The engine coolant temperature is one of the fundamental parameters for the proper functioning of the engine. The vehicle's onboard diagnostics system was unable to detect the malfunction of the thermostat. As a consequence, fuel consumption increased, which was especially noticeable in winter. This paper evaluates the possibility of carrying out thermostat diagnostics using data obtained from the OBD system through a diagnostic interface ELM327, which is connected to the OBD-II connector and interfaced with Torque Pro software on a smartphone. Analysis of the data confirmed that the proposed diagnostic method was appropriate. Furthermore, the impact of the thermostat malfunction on different factors such as coolant temperature, cold engine warm-up time, parameters characterising thermostat cycling, and fuel consumption of the car were studied. It was found that, apart from the already mentioned decrease in coolant temperature, the thermostat hysteresis also decreased and the thermostat cycle time increased.

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A methodology for non-invasive diagnosis of diesel engines through characteristics of starter system performance

Cited by 2 publications

References 0 publications

Voltage Signals Measured Directly at the Battery and via On-Board Diagnostics: A Comparison

Voltage Signals Measured Directly at the Battery and via On-Board Diagnostics: A Comparison

Diagnosing the thermostat using vehicle on-board diagnostic (OBD) data

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