Universal plan of automotive automatic transmissions stage shift speeds
by Leonid Krasnevski
International Journal of Vehicle Design (IJVD), Vol. 25, No. 3, 2001

Abstract: Hydromechanical transmissions belong to the most complicated units of modern automobiles. Nowadays, for the perfect apparatus of the main units - multistage planetary gear mechanisms (gearboxes) - analysis and synthesis has been developed. One of the main tools of this kind of gearbox kinematic scheme synthesis is the well-known ''plan of speeds''. At the same time, the theory of mechatronic automatic control systems, that belong to the ''youngest'' automotive systems, is still far from finished and their designing is practically based on the intuitive methods and designer's skill. The main way of visual representation of system functioning laws is graph in coordinates of vehicle speed and throttle opening degree, on which lines of speed changes points are given, that previously calculated by traction and fuel consumption valuation. In spite of the appearance of new speed changes laws valuation methods, for example fuzzy logic methods, this graph is now also widely used. In this paper, improvement of given methods is proposed that permits not only to execute qualitative analysis, but also to work out many valuation tasks up to the characteristic dimensions of the hydraulic valves, tolerances of shift points evaluation of the system's accuracy.

Online publication date: Mon, 18-Aug-2003

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Vehicle Design (IJVD):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com