Face dog clutch engagement at low mismatch speed

Bóka, Gergely; Márialigeti, János; Lovas, László; Trencséni, Balázs

doi:10.3311/pp.tr.2010-1.06

Cited by 17 publications

(8 citation statements)

References 2 publications

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“…Aiming at optimizing the shifting control of an automatic mechanical transmission (AMT) used in vehicles, Yang et al proposed a method of optimal shifting control based on pattern recognition and a learning algorithm [4]. Bóka et al use a simple mechanical model to define the reduction of the speed difference between the synchronizers in order to obtain a smooth gear shifting [5]. Qi et al analyze the principle of gear shifting in a hydraulic system and obtain an expert PID control to reduce the shifting vibration and time [6].…”

Section: Shifting Control Methods For Staring Gearmentioning

confidence: 99%

Research on Shifting Control Method of Positive Independent Mechanical Split Path Transmission for the Starting Gear

Jiang

Meng

Chen

2013

Mathematical Problems in Engineering

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To realize a smooth and quick shift of the positive independent mechanical split path transmission (PIMSPT) equipped with automatic shifting control system (ASCS), the research on the feasibility of improving shift quality by dynamic and cooperative controlling engine, steering clutches, and brakes has been conducted. The shifting control method suited to starting gear of PIMSPT has been proposed. The control method is based on control parameters, such as the driving shaft speed and its derivative. The control laws of steering clutches and brakes are presented during each gear and stage of shifting. Bench and road test results show that the proposed shifting control method can not only shorten the shift time, but also decrease the jerk of shifting effectively.

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Section: Shifting Control Methods For Staring Gearmentioning

confidence: 99%

Research on Shifting Control Method of Positive Independent Mechanical Split Path Transmission for the Starting Gear

Jiang

Meng

Chen

2013

Mathematical Problems in Engineering

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“…Thus the variable-idle speed control scheme is proposed for compromising the driving comfort and the improvement of torque capacity. But, the main cause of uncomfortable jerk is the rapid clutch engagement at a high relative angular velocity between the driving and driven sides for satisfying the requirement of the load torque [21]. Therefore, the rotational speed to be engaged to the driven side should be necessarily limited to a certain range.…”

Section: Implementation Of Idle Speed Control With Armature Voltage Amentioning

confidence: 99%

Research on torque compensation with optimal pedal throttle for direct-drive electric vehicle start-up

Xiong

2017

Teh. vjesn.

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Original scientific paper The original rigid connection between the motor and the hub is replaced with a flexible one using the clutch to connect the driving and driven sides of the driveline system. Then the paper proposes a separable process of motor start-up and load operation, based on which the scheme of idle speed control is studied. Focusing on the contradiction between the extended torque capacity and the reduced vehicle jerk merely by tuning the idle speeds, an improved solution is proposed for toque compensation by throttle adjustment during the clutch engagement. Furthermore, the method for tracking the armature voltage of the driving motor is investigated and optimized, aiming at the balance between the demanded transmitted torque and the jerk level during the starting process. Finally, effectively enhanced torque capacity of the driving motor for the vehicle start-up on the premise of the improved comfort level has been demonstrated by experiments. Keywords: armature voltage compensation; direct-drive; flexible coupling; idle speed; vehicle jerkIstraživanje kompenzacije zakretnog momenta s optimalnom prigušnicom pedale za pokretanje električnog vozila izravnog stupnja prijenosa Izvorni znanstveni članak Originalna kruta veza između motora i glavine zamijenjena je fleksibilnom uporabom spojke za povezivanje pogonskog i gonjenog vratila sustava prijenosa. U radu se zatim predstavlja odvojeni proces pokretanja i opterećenja motora na osnovu kojega se analizira shema reguliranja rada motora u praznom hodu. Fokusiranjem na probleme koordinacije povećanog kapaciteta zakretnog momenta i smanjenja trzaja automobila samo regulacijom rada motora u praznom hodu, predlaže se poboljšano rješenje kompenzacije zakretnog momenta podešavanjem napona rotora dok se spojka aktivira gonjenom stranom. Nadalje, ispituje se i optimizira metoda za označavanje napona zakretnog momenta s ciljem stvaranja balansa između traženog prijenosnog mehanizma zakretnog momenta i jačine trzaja tijekom pokretanja vozila. Konačno, eksperimentima je demonstriran učinkovito poboljšani učinak zakretnog momenta pogonskog motora kod pokretanja vozila u svrhu povećane udobnosti.Ključne riječi: elastična spojka; izravni prijenos; kompenzacija napona rotora; rad motora u praznom hodu; trzaj vozila

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“…Bóka [16] described an external synchronization strategy for a dog clutch in automatized mechanical transmission (AMT) for heavy-duty commercial vehicles. Later, Bóka [18] developed more the strategy. He used a dynamic modeling approach for system modeling and used the notion of engagement probability to find a certain successful gearshift region.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling of the Dog Clutch Engagement Process Using Hybrid Automata

2023

jjmie

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A detailed system dynamics model is essential for the design and calibration of the system controller. This paper introduces a control-oriented full dynamic model for the dog clutch engagement process that can be integrated with other system dynamic models found in ground vehicle transmission systems, such as the shifting mechanism system. This integrated model can be used later to design a position controller of the shifting mechanism's linkages to achieve a successful gearshift process. The engagement process is divided into four main stages, each of which has distinct dynamic behavior. The dynamics of each discrete stage are analyzed and modeled, and then, the discrete stages are integrated into one model using the hybrid automata modeling technique. Hybrid automata enables us to describe the continuous states within the discrete stages, which is better than continuous time techniques. The possible interactions between the sliding sleeve and the gear are analyzed and based on these interactions, the transition paths' conditions between these stages are established. The hybrid automata model comprises four discrete stages and ten guards that govern the transition between these stages. This model was simulated using Simulink State flow. Three cases are considered to verify the model, and the results showed that it could accurately capture the continuous system dynamics despite four discrete states. Furthermore, the transitions between the discrete states match the possible transition paths and guards.

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Face dog clutch engagement at low mismatch speed

Cited by 17 publications

References 2 publications

Research on Shifting Control Method of Positive Independent Mechanical Split Path Transmission for the Starting Gear

Research on Shifting Control Method of Positive Independent Mechanical Split Path Transmission for the Starting Gear

Research on torque compensation with optimal pedal throttle for direct-drive electric vehicle start-up

Dynamic Modeling of the Dog Clutch Engagement Process Using Hybrid Automata

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