Engine Valve Train Dynamic Analysis using 1-D Simulation Approach Tafe Motors and Tractors Limited

Format:

Book

Conference/Event

Author/Creator:

Nain, Ajay, author.

Contributor:

Nene, Devendra

Conference Name:

NuGen Summit (2019-11-27 : Manesar, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2019

Summary:

In order to reduce engine development timing and cost, a numerical calculation used to evaluate valve train systems. This paper discusses the work done on kinematic and dynamic analysis of Valve Train (VT) system of a diesel engine by using 1-D Ricardo Valdyn software. The goal is to meet optimum intake, exhaust valve timing requirement, maximize, valve open area and 30% over-speed requirement. Valve train model is prepared and inputs like mass and stiffness are estimated from 3-D model and finite element analysis, respectively. Simulation model is used for predicting valve bounce speed, valve displacement, cam-follower contact stress and strain in the rocker arm. Initially, Kinematic analysis is carried out to study the change in valve motion characteristics such as cam contour radius, tappet contact eccentricity et cetera Further to this, dynamic analysis is carried out to assess forces and stresses on valve train components. Effect of cam tappet contact stresses, buckling load on push rod, spring surge, ratio of spring force to inertia force, valve seating velocity at increased speed condition et cetera are discussed in detail. The optimized cam profile and ramp have improved overall valve dynamics in terms of valve seating velocity and valve seating force. The dynamic vibration described in this paper has been fully validated by measurement

Notes:

Vendor supplied data

Publisher Number:

2019-28-2422

Access Restriction:

Restricted for use by site license