Abstract. Clutch judder is a friction-induced self-excited vibration occurring in automotive drivelines, an NVH issue studied for more than forty years and attributed by the scientific community to three possible causes: stick-slip, negative gradient of coefficient friction geometric disturbances. However, these explanations fail describe kind this contribution, arising presence oscillating com...

Original scientific paper By introducing a novel permanent magnetic bi-stable electromagnetic clutch unit (PMBECU) in the driveline of directly-driven electric vehicle, a flexible connection between motor and hub is realized with characteristic of separated starting process of drive motor and wheel load. Firstly, the working principle and power supply scheme for the PMBECU is discussed. Then th...

In this paper, a complete model of an electro hydraulic driven dry clutch along with its performance evaluation has elucidated. Through precision modeling, a complete nonlinear physical and full order sketch of clutch has drawn. Ultimate nonlinearities existent in the system prohibits it from being controlled by conventional linear control algorithms and to compensate the behavior of the sy...

Theories on the evolution of clutch size are primarily influenced by examples from terrestrial animals, yet most animal phyla occur exclusively in water. Oxygen has a lower diffusion coefficient and lower solubility in water than in air, and siblings in aquatic clutches often compete for oxygen. Mitigating this competition could affect allocation of resources to offspring. Gelatinous clutches a...

How much effort to expend in any one bout of reproduction is among the most important decisions made by an individual that breeds more than once. According to life-history theory, reproduction is costly, and individuals that invest too much in a given reproductive bout pay with reduced reproductive output in the future. Likewise, investing too little does not maximize reproductive potential. Be...

Parental care is a widespread and ecologically relevant adaptation known to enhance the developmental environment of offspring. Parental behaviors, however, may entail both costs and benefits for developing offspring. In Children's pythons (Antaresia childreni), we monitored both maternal egg-brooding behavior and intra-clutch oxygen partial pressure (PO2) in real-time to assess the effects of ...

Few studies have examined how avian life-history traits vary within populations as elevation increases and climate becomes more severe. We compared egg and clutch sizes of Mountain Bluebirds (Sialia currucoides) nesting at two elevations (1500 m and 2500 m above sea level) in the Bighorn Mountains of Wyoming over two years. Eggs laid by females at the high-elevation site were, on average, signi...

Dolenec, Z.: Some breeding traits of the pied wagtail (Motacilla alba) in NW Croatia. Nat. Croat., Vol. 20, No. 1., 209–214, 2011, Zagreb. In this study, some key aspects of the breeding performance of the pied wagtail are reported for the first time in northwestern Croatian. Only first clutches are included. The average egg length was 20.04 mm, breadth = 14.96 mm, volume = 2276.41 mm3 and egg ...

To enable a realistic automated manual transmission (AMT) system performance evaluation and rapid prototyping, this paper focuses on constructing a practical Simulink model and a hardware-in-the-loop (HIL) real-time simulation. The working principle and dynamic characteristics of the AMT system are first explored. The driveline, the engine control, and the dry clutch are modelled and analysed. ...