نتایج جستجو برای: exhaust valve

تعداد نتایج: 118245  

2009
Jeremy P. Langrish Magnus Lundbäck Nicholas L. Mills Neil R. Johnston David J. Webb Thomas Sandström Anders Blomberg David E. Newby

Diesel exhaust inhalation impairs vascular function, and, although the underlying mechanism remains unclear, endothelin (ET) 1 and NO are potential mediators. The aim of this study was to identify whether diesel exhaust inhalation affects the vascular actions of ET-1 in humans. In a randomized, double-blind crossover study, 13 healthy male volunteers were exposed to either filtered air or dilut...

Journal: :BMC Pregnancy and Childbirth 2002
Nobue Watanabe Masanobu Ohsawa

BACKGROUND: The possible participation of diesel exhaust inhalation during the fetal period in the elevation of IgE against pollen in postnatal life was investigated. METHOD: The experiment was conducted using rat pups. Group I; exposed to clean air (Control). Group 2, 3; exposed to total or filtered diesel exhaust during the fetal period (Total-C-C, Filtered-C-C). Group 4, 5; exposed to total ...

Journal: :Occupational and environmental medicine 1999
B Rudell U Wass P Hörstedt J O Levin R Lindahl U Rannug A L Sunesson Y Ostberg T Sandström

OBJECTIVES To evaluate the efficiency of different automotive cabin air filters to prevent penetration of components of diesel exhaust and thereby reduce biomedical effects in human subjects. Filtered air and unfiltered diluted diesel exhaust (DDE) were used as negative and positive controls, respectively, and were compared with exposure to DDE filtered with four different filter systems. MET...

Journal: :IARC monographs on the evaluation of carcinogenic risks to humans 2014

diesel and gasoline engine exhausts and some nitroarenes iarc monographs on the evaluation of carcinogenic risks to iarc working group on the evaluation of carcinogenic risks diesel and gasoline engine exhausts and some nitroarenes diesel exhaust iarc monographs on the evaluation of the diesel exhaust exposure and biomonitoring: selected references diesel exhaust iarc monographs on the evaluati...

Journal: :Environmental Health Perspectives 1977
W T Piver

Emission control devices are installed to meet the exhaust standards of the Clean Air Act for carbon monoxide and hydrocarbons, and it is necessary to know, from a public health point of view, how exhaust emissions may be affected by changes in fuel additives and fuel composition. Since these topics are concerned with developing technologies, the available literature on exhaust emission charact...

Journal: :IOP Conference Series: Materials Science and Engineering 2018

Journal: :The Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2013

Journal: :Control Engineering Practice 2023

A fully variable valve train significantly increases the degree of freedom control internal combustion engines. Cylinder deactivation, thermal management, alternative strategies, and minimized pumping losses are just a few examples enabled by freely adaptable intake exhaust timings. This paper presents method to achieve accurate tracking load trajectories under stoichiometric conditions. feedba...

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