Control of the Transmission Ratio Derivative in Passenger Car Powertrain with CVT

Jantos, Jerzy

doi:10.4271/2001-01-1159

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…To improve the fuel consumption of considered vehicle the CVT drive line dynamics must be analysed [5,7]. The drive line is modelled only in its longitudinal behaviour and no drive train elasticities are taken into account.…”

Section: System Modellingmentioning

confidence: 99%

Analysis of an employment of a gear ratio rate in CVT control system

Grzegożek

Szczepka

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Continuously variable transmissions(CVTs) potentially ensure the selection of such a gear ratio that scooter fuel consumption can reach minimum value. Traditionally these CVT gearboxes are mechanically controlled, causing a gear ratio to be an engine revs function. This solution does not ensure optimum gear ratio. In this paper the solution for fuel optimal control problem is presented. The results obtained during brake stand research of scooter powertrains show the significant values of brake specific fuel consumption for the velocity that is maximum for a scooter according to highway code. With the introduction of CVT gearbox in which the selection of gear ratio can be controlled according to the worked out strategy the solution for fuel consumption problem is possible. Electromechanical actuators ensure the selection of a gear ratio independently of engine revs. Such type of construction solution makes working out the suitable control strategy that ensures decreasing of scooter fuel consumption possible. Presented strategies do not use precise optimization techniques. The CVT efficiency has a strong influence on transient operation. In the paper the control strategy owing to which fuel consumption decreases by over 40% is presented. The strategy was worked out on the basis of fuel consumption map for a defined scooter exploitation model. The possibilities of realization of the worked out strategy were tested on the brake test stand.

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Section: System Modellingmentioning

confidence: 99%

Analysis of an employment of a gear ratio rate in CVT control system

Grzegożek

Szczepka

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Automatization of gear shift and number selection in passenger cars with stepped transmission result in improvement of driving safety due to concentration of driver's attention on the conditions of the traffic [1,3]. Besides, the car can be used by a disabled person.

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confidence: 99%

Automatic Gear Shift Unit

Jantos

Prażnowski

Mamala

2009

SSP

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Automatization of gear shift and number selection in passenger cars with stepped transmission result in improvement of driving safety due to concentration of driver’s attention on the conditions of the traffic [1, 3]. Besides, the car can be used by a disabled person. The most important benefit of the projected solution is associated with reduction in fuel consumption resulting from the more economical selection of the transmission ratio [4, 5, 7]. The gear number choice depends on many factors, for example: traffic conditions, temporum vehicle and engine rotational speed as well as engine load. It is very often the case that even a driver with experience can face problems with optimal decisions. Automatically controlled system with suitable algorithm can reduce fuel consumption and improve the vehicle drivability. The system named MeGSS (Mechatronic Gear Shift System) has been developed for this purpose. It was subsequently tested in a passenger car equipped with five-step gear box. In the car the MeGSS is responsible for engine start process and the gear shift procedure. In this system the manual (M) and automatic (A) gear ratio control is possible. The gear shift procedure is connected with electronic throttle control algorithm, which promote smooth power transmission [2, 6].

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Modeling and Simulation of the Hybrid Powertrain for the Use in Urban Vehicle

Lechowicz

Augustynowicz

2015

Advances in Intelligent Systems and Computing

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Control of the Transmission Ratio Derivative in Passenger Car Powertrain with CVT

Cited by 6 publications

References 3 publications

Analysis of an employment of a gear ratio rate in CVT control system

Analysis of an employment of a gear ratio rate in CVT control system

Automatic Gear Shift Unit

Modeling and Simulation of the Hybrid Powertrain for the Use in Urban Vehicle

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