Headlamp modelling for simulating the capacity of automotive wiring systems

Lim, Hee Chun; Park, Jaehong

doi:10.1243/09544070360729383

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…For this reason, a headlight model is presented that can be used as part of a computer simulation of car wiring system. 8 In the mentioned research, the headlight is modeled as a variable resistor whose resistance is determined by changing the operating temperature according to the applied voltage. Due to the good compatibility of their model with real data, it can be used to simulate faster and easier loads on car wiring.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Experimental Validation of Automotive Bulbs

Vanani

Ghanbari

Zavaragh

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In a vehicle, bulbs called the P-group are responsible for warning other drivers or pedestrians and they are known as signal bulbs. Signal bulbs have been used to emit warning and hazard signs in parts such as brake lights, direction indicator, hazard lights (night vision) as well as tail bulbs and car park alarms. There has been limited researches on the photometric characteristics of these lamps, but a review of these studies revealed that no detailed research has yet been done on optimizing these characteristics, and there is a scientific gap. In this study, factors affecting the service life and luminous flux were evaluated by using Taguchi design of experiments method. The results showed that the two factors of weight percent composition of bubble filling neutral gases and the volumetric efficiency of gases injected into the bubble had the most influence on the target parameters. Experimental results showed that the optimum composition of neutral gases injected into the bulb bubble can extend the bulb service life to approximately 341 h, which is three times the service life of a bulb with the inappropriate composition of fill gases. Then the optimum state of the service life and the luminous flux were determined to meet the reference standards. Although the service life and luminous flux parameters were able to reach 341 h and 513 lumens in the maximized state, however, in the optimum state with satisfying reference standards, the service life and luminous flux were 330 h and 463 lumens, respectively. Then, the bulb bubble filling with inert neutral gases and its effect on the bulb service life was investigated. The results showed that if the volumetric efficiency of gas injection increased from the normal 75%–100%, the service life of the test lamps would be improved by about 10%.

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Section: Introductionmentioning

confidence: 99%

Optimization and Experimental Validation of Automotive Bulbs

Vanani

Ghanbari

Zavaragh

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Performing a simulation requires not only a wire harness design tool supporting the simulation function but also models of the electrical systems installed in the wire harness [2,5]. The Saber tool is a very powerful simulation tool, and an investigation has been reported on the model-based design of a vehicle electrical system with the Saber tool [6].…”

Section: Introductionmentioning

confidence: 99%

Electronic control unit modelling for automotive wire harness simulation using the Capital Harness system

Kim

Lee

Park

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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With an increase in the number of electrical systems installed in vehicles, the wire harness design has become increasingly complicated and, accordingly, it has become essential that it is validated. Simulation is a good method of validation but it requires models of the installed electrical systems as well as wire harness design tools to support the simulation function. An electronic control unit (ECU) is a particularly important electrical system because it is connected to many other electrical systems through the wire harness and controls their operations. In this study, a method for modelling ECUs is developed, using the Capital Harness system design tool. The model parameters of the ECU are categorized into system parameters, external parameters, network parameters, and power parameters. The electrical structure of an ECU is built on the basis of the types and default states of the parameters. The behaviour of the ECU is defined in terms of simplified combinational logics in a state-machine-based structure since the target of the modelling is to simulate the logical connection conformity of the wire harness. A power-seat ECU model is developed, using the proposed method, and the feasibility of the simulation for wire harness validation is described.

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Implementation and Experimental Verification of Smart Junction Box for Low-Voltage Automotive Electronics in Electric Vehicles

Lee

Baek

2020

Applied Sciences

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In this study, we designed and implemented a smart junction box (SJB) that was optimized for supplying power to low-voltage headlights (13.5 V) in electric vehicles. The design incorporated a number of automotive semiconductor devices, and components were placed in a high-density arrangement to reduce the overall size of the final design. The heat generated by the SJB was efficiently managed to mount an Intelligent Power Switch (IPS), which was used to power the headlights onto the printed circuit board (PCB) to minimize the impact on other components. The SJB was designed to provide power to the headlights via pulse width modulation to extend their lifetime. In addition, overload protection and fail/safe functions were implemented in the software to improve the stability of the system, and a controller area network (CAN) bus was provided for communications with various components in the SJB as well as with external controllers. The performance of the SJB was validated via a load operation test to assess the short circuit and overload protection functions, and the output duty cycle was evaluated across a range of input voltages to ensure proper operation. Based on our results, the power supplied to the headlights was found to be uniform and stable.

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Headlamp modelling for simulating the capacity of automotive wiring systems

Cited by 3 publications

References 7 publications

Optimization and Experimental Validation of Automotive Bulbs

Optimization and Experimental Validation of Automotive Bulbs

Electronic control unit modelling for automotive wire harness simulation using the Capital Harness system

Implementation and Experimental Verification of Smart Junction Box for Low-Voltage Automotive Electronics in Electric Vehicles

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