Abstract
A control variable method was used to study experimentally the properties of automatic mechanical transmission actuators under cryogenic running conditions. Only one temperature variable was changed during the experiment so as to facilitate the comparison between the impacts of the temperature on the execution characteristics of actuators. From a series of cryogenic experiments and data analysis, the cryogenic characteristic curves (e.g. for the clutch, for the throttle, for gear selection and for putting the automatic mechanical transmission into gear) were drawn, providing guidance for subsequent temperature compensation control methods. In addition, given that the phenomenon in which the clutch and the shift gear in the automatic mechanical transmission control system seized up at −40 °C, a cryogenic thawing strategy was then added to the automatic mechanical transmission control system. The results show that this cryogenic thawing strategy can effectively reduce the starting and running resistances of the automatic mechanical transmission at low temperatures, enabling vehicles equipped with the automatic mechanical transmission control system to operate normally at −40 °C and thus enhancing the reliability of these vehicles in low-temperature operation. The present temperature compensation control method and the cryogenic thawing strategy are of great significance for improving the reliability and security of automatic mechanical transmission control at low temperatures.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.