An Overview of Current CVT Mechanisms, Forces and Efficiencies

Kluger, Michael A.; Fussner, Douglas R.

doi:10.4271/970688

Cited by 20 publications

(20 citation statements)

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“…θ , which as shown in equation (86) has a pivotal influence on both the SCR NOx reduction and SCR ammonia slip, but cannot be measured by any sensors. The other variable is the actual NOx concentration in the presence of NH3 due to the NOx sensor ammonia cross-sensitivity.…”

Section: Nhmentioning

confidence: 99%

“…The other variable is the actual NOx concentration in the presence of NH3 due to the NOx sensor ammonia cross-sensitivity. In [65]- [67], sliding-mode observers and gain-scheduled observer were developed based on the SCR control-oriented models like the one in equation (86) to estimate the SCR ammonia coverage ratio in real-time. Simulations and indirect experimental measurements were used to demonstrate the effectiveness of such observers.…”

Section: Nhmentioning

confidence: 99%

“…Continuously variable transmissions (CVT) [86] allows the engine to operate at speed and load conditions independently from the speed and load requests of the vehicle by varying the transmission ratio continuously. This feature enables the engine to operate in the optimal region independent of the vehicle speed to maximize the fuel efficiency and reduce emissions.…”

Section: A Introduction To the Transmission Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Tutorial of model-based powertrain and aftertreatment system control design and implementation

Zhu

Wang

Sun

et al. 2015

2015 American Control Conference (ACC)

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This paper introduces the needs for applying model-based control techniques to vehicle powertrain and aftertreatment systems. A tutorial overview of model-based control techniques and methodologies for modern powertrain and aftertreatment systems is presented and compared with the traditional approaches. The control-oriented powertrain and aftertreatment system modeling techniques are also addressed along with their real-time simulation requirement for HIL (hardware-in-the-loop) simulations. The application examples of the model-based control of internal combustion engine, transmission, and aftertreatment systems are given in detail.Guoming Zhu is with the Department of Mechanical Engineering and the

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Section: Nhmentioning

confidence: 99%

Section: Nhmentioning

confidence: 99%

Section: A Introduction To the Transmission Systemsmentioning

confidence: 99%

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Tutorial of model-based powertrain and aftertreatment system control design and implementation

Zhu

Wang

Sun

et al. 2015

2015 American Control Conference (ACC)

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“…CVTs primarily differ in the type of variator used: commonly the belt type [1][2][3][4][5][6][7][8][9][10], but also hydrostatic [11][12][13], traction [14][15][16], and electric (e-CVT) [17][18][19] ones, based on the ability of variable speed electric machines to continuously change their shaft speed from zero to an arbitrary required speed. Infinitely variable transmissions [20][21][22][23] have been successfully applied as vehicle transmission.…”

Section: Introductionmentioning

confidence: 99%

On the Feasibility of Independently Controllable Transmissions

et al. 2017

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Abstract:The present research is carried out to determine whether the independently controllable transmission (ICTs) are able to transmit the energy/power from the arbitrary variable speed input shaft to the variable or constant speed of the output shaft, independent of each other and without a control system. For this purpose, the novel ICT proposed in this study has the required features and is simpler than those proposed so far. However, this ICT and any other proposed ICT, while being feasible from a kinematic point of view, results in the conclusion that the transmissions are practically inapplicable, as will be demonstrated from the detailed power flow analysis carried out and presented in this paper. This is because either one shaft, the so called "free shaft", has variable uncontrollable speed, or a couple of the shafts have powers close to zero.

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“…Continuously variable transmissions (CVT) enable the engine to operate in a wide range of speed and load conditions independently from the speed and load requests of the vehicle [4]. This feature allows the engine to operate in the optimal region virtually independent of the vehicle speed to maximize the fuel efficiency.…”

Section: Oncoming Clutchmentioning

confidence: 99%

Challenges and opportunities in automotive transmission control

Sun

Hebbale

Proceedings of the 2005, American Control Conference, 2005.

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Automotive transmission is a key element in the powertrain that connects the power source to the wheels of a vehicle. To improve fuel economy, reduce emission and enhance driving performance, many new technologies have been introduced in the transmission area in recent years. This paper first reviews different types of automotive transmissions and explains their unique control characteristics. We then address the challenges facing automotive transmission control from three aspects: calibration, shift scheduling, and sensing, actuation and electronics. Along the way, research opportunies to further improve system performance are discussed.

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An Overview of Current CVT Mechanisms, Forces and Efficiencies

Cited by 20 publications

References 0 publications

Tutorial of model-based powertrain and aftertreatment system control design and implementation

Tutorial of model-based powertrain and aftertreatment system control design and implementation

On the Feasibility of Independently Controllable Transmissions

Challenges and opportunities in automotive transmission control

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