Research on the Hill-Start Assist of Commercial Vehicles Based on Electronic Parking Brake System

doi:10.5545/sv-jme.2018.5422

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…According to the analysis in Fig. 9, the control goal of hill start is to make the braking force F brk follow the curve in the figure, namely: (13) where, the driving force and slope resistance can be calculated according to equations (14) and 15:…”

Section: ) Analysis Of Hill Startmentioning

confidence: 99%

“…However, as the brake pressure increases, the period of the bangbang control will become longer, which will cause a relatively large delay in the release of braking force. Researchers [13]- [14] proposed a hill-start scheme based on logic threshold control to improve the accuracy of the HAC to some extent. However, if the above methods of the design for the traditional gasoline-fueled automobiles are directly applied to distributed drive electric vehicles, it may result in poor control or failure of the hill-start assist system.…”

Section: Introductionmentioning

confidence: 99%

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Hill-Start of Distributed Drive Electric Vehicle Based on Pneumatic Electronic Parking Brake System

Wang

et al. 2020

IEEE Access

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The hill-start assist system (HAS) ensures that the vehicle starting on the ramp will not roll backwards, which improves the convenience of the driving in the case of starting on the ramp and parking. However, the traditional hill-start method is not suitable for distributed driving electric vehicles under some circumstances. Therefore, based on the pneumatic electronic parking brake system (EPB), a hill-start control method suitable for distributed driving electric vehicles is proposed in this paper, so as to realize the vehicle's fast and stable starting on the ramp. Firstly, by analyzing the change of the force of the vehicle during the starting of the ramp, a dynamic allocation strategy based on the front and rear axle loads is adopted in terms of demand torque. Secondly, according to the force analysis of the vehicle on the ramp, the control target of hill-start is determined, and the logic threshold control method is used to make the actual pressure change with the ideal pressure in real time. Then, a driving torque correction controller based on the sliding mode algorithm is designed to prevent driving wheels from slipping on bad roads, resulting in a reduction in the total driving force and a rollback of the vehicle. Finally, to verify its feasibility, Matlab, Trucksim and AMEsim were used to establish the controller model, the vehicle model and the pneumatic EPB system model for co-simulation verification. The simulation results show that the proposed control strategy can prevent the vehicle from slipping under different road conditions with less brake wear.

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Section: ) Analysis Of Hill Startmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hill-Start of Distributed Drive Electric Vehicle Based on Pneumatic Electronic Parking Brake System

Wang

et al. 2020

IEEE Access

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“…By optimizing the control of clutch engagement, it is possible to reduce clutch wear and energy loss, shorten the clutch engagement process, and reduce jerking and friction [6]. Control of the clutch engagement process in AMTs has a significant impact on various performance characteristics of a vehicle, such as its start-up [7], fuel consumption [8], dynamics [9] and security [10]. This paper focuses on optimization of the clutch engagement control strategy during vehicle start-up.…”

Section: Introductionmentioning

confidence: 99%

Double layer control for AMT clutch in commercial vehicle starting: design and experiment

Song¹,

Wang²,

Liu³

et al. 2019

SV-JME

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Engagement control of an automatic mechanical transmission clutch during vehicle start-up has important influences on the safety, comfort, service life, energy consumption, and emissions of the vehicle. However, all existing control strategies use single-layer control, which leads to poor temperature adaptability. This paper develops a double-layer control strategy based on an automatic actuator to improve vehicle start-up performance. The governing characteristics of a diesel engine with a variable-speed governor are studied. The working principles and a model of the automatic actuator are described. A simulation of vehicle start-up is constructed and tested. Finally, the double-layer control strategy is verified in an experimental vehicle. The experimental and simulation results show that the double-layer control strategy provides shorter start times, less jerking, and lower friction, thereby demonstrating its effectiveness and practicability. Keywords: automatic mechanical transmission, start-up process, clutch engagement control, double-layer control Highlights • A double-layer control strategy is designed based on an automatic clutch actuator and controller. • Temperature changes affect clutch engagement performance during the vehicle start-up process. • Comparative outcomes verify the benefits of our scheme in terms of start time, jerking and friction work. • Experiments with an actual vehicle further validate the proposed control strategy.

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Mathematical Modelling and Analysis to Derive Optimum Brake Pressure for Hill Start Assist System in Commercial Vehicles

Shrivastava,

Dalvi

2024

IJISME

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Braking systems are an integral component of both passenger cars and commercial vehicles. Braking lag or delay endangers both the driver and the vehicle, as well as the effectiveness of the brakes. This becomes riskier as the hill begins to rise. To give the driver the chance to run safely when the brakes are applied, the Hill Start Assist is combined with the standard ABS. This can help avoid rollback on an incline. The characteristics that could help enhance this and increase braking efficiency will be the focus of the study. In this research , we design and compute the ideal brake force needed at different angles, and then create a MATLAB model to simulate the outcomes. This would help to make the system more efficient, prevent energy loss, and reduce the dependency on the footbrake valve.

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Research on the Hill-Start Assist of Commercial Vehicles Based on Electronic Parking Brake System

Cited by 3 publications

References 11 publications

Hill-Start of Distributed Drive Electric Vehicle Based on Pneumatic Electronic Parking Brake System

Hill-Start of Distributed Drive Electric Vehicle Based on Pneumatic Electronic Parking Brake System

Double layer control for AMT clutch in commercial vehicle starting: design and experiment

Mathematical Modelling and Analysis to Derive Optimum Brake Pressure for Hill Start Assist System in Commercial Vehicles

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