Simulated behaviour of a vehicle with V-belt geared neutral transmission with variator slip control

Veenhuizen, P.A.; Bonsen, B.; Klaassen, T.W.G.L.; Meerakker, K.G.O. van de; Nijmeijer, Henk; Veldpaus, F.E.

doi:10.1243/095440705x34982

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…From equations (7) and (8), it can be seen that the input torque of the power-cycling HMTs varies with the ITC and the input speed. And the ITC is a function of the speed ratio.…”

Section: Design Constraintsmentioning

confidence: 99%

“…It was found that the TR increased to a finite value while the speed ratio was infinitely close to zero, laying a basis for optimal torque control at such a point. Veenhuizen et al 8 established the simulation model for the geared neutral CVT near the speed ratio of zero. The results showed that both the stall and launching performance of the vehicle equipped with geared neutral CVT were better than those of the vehicle equipped with traditional automatic transmission.…”

Section: Introductionmentioning

confidence: 99%

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Multi-objective design optimization of power-cycling hydrodynamic mechanical transmissions

Liu

Sun

Qin

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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The power-cycling hydrodynamic mechanical transmissions have the advantages of continuously adjustable speed ratio and high efficiency compared with the traditional automatic transmissions, so they may be a good substitute for the prior art. For off-highway vehicles which frequently work in low speed and confront great resistance, the zero-speed-ratio torque ratio (TR) of the power-cycling hydrodynamic mechanical transmissions represents the power performance of the vehicles. Furthermore, the complexity of the transmissions is an indispensable consideration for industrial designers. The radial and axial dimensions of the power-cycling hydrodynamic mechanical transmissions are determined by the effective diameter of the torque converter’s circuit and the number of transmissions gears, respectively. In order to optimize the zero-speed-ratio TR and the complexity of the power-cycling hydrodynamic mechanical transmissions, a design methodology is proposed. Considering that there is no explicit mathematical relationship between the design variables and the multi-objective functions, the parametric design and numerical simulation for the torque converter are carried out. The intrinsic mapping between the design variables and the multi-objective functions is fitted by the radial basis function neural network. On this basis, the fast and elitist non-dominated sorting genetic algorithm (NSGA-ΙΙ) is used to solve the multi-objective optimization problem. The numerical simulation for one group of solution selected from the Pareto optimal solutions is conducted. The simulation results indicate that the design methodology proposed in this study is effective. The optimal results show that the zero-speed-ratio TR of the power-cycling hydrodynamic mechanical transmissions is heavily influenced by the radial and axial space of such transmissions. The design optimization helps to find the optimal solutions for the power-cycling HMTs, which are superior to the traditional automatic transmissions and match well the prime mover.

show abstract

“…From equations (7) and (8), it can be seen that the input torque of the power-cycling HMTs varies with the ITC and the input speed. And the ITC is a function of the speed ratio.…”

Section: Design Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-objective design optimization of power-cycling hydrodynamic mechanical transmissions

Liu

Sun

Qin

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The intermediate slip region is defined as the region beyond the microslip region and below the macroslip region where damage to belt and/or sheaves can be expected after prolonged running [3]. …”

Section: Working Principle Of Push-belt Cvtmentioning

confidence: 99%