Publication detail
Redesign and dynamics of the valve train of an aircraft engine
DRÁPAL, L. VOPAŘIL, J. FRIDRICHOVÁ, K. DLUGOŠ, J.
English title
Redesign and dynamics of the valve train of an aircraft engine
Type
article in a collection out of WoS and Scopus
Language
en
Original abstract
In aviation, reciprocating internal combustion engines are currently used for propulsion of light aircraft. Their design is often based on older and proven engines. This paper describes part of the modernizing of a spark-ignition inverted in-line four-cylinder air-cooled engine for ultra-light aircraft. The aim of the presented section is to redesign the force transmission from the cam to the push rod of the OverHead Valve system in order to reduce production costs and improve engine performance. For this purpose, state-of-the-art methods of kinematics design and simulation of valve train dynamics are used. The article presents three variants with a flat-faced cam follower differing in the cam lift, in the lever ratio of the rocker arm and the length of the push rod. Based on dynamic simulations, the best variant is then selected with better parameters of the intake and exhaust process with the same lift and timing compared to the initial design, and simultaneously lower demands on production technology.
English abstract
In aviation, reciprocating internal combustion engines are currently used for propulsion of light aircraft. Their design is often based on older and proven engines. This paper describes part of the modernizing of a spark-ignition inverted in-line four-cylinder air-cooled engine for ultra-light aircraft. The aim of the presented section is to redesign the force transmission from the cam to the push rod of the OverHead Valve system in order to reduce production costs and improve engine performance. For this purpose, state-of-the-art methods of kinematics design and simulation of valve train dynamics are used. The article presents three variants with a flat-faced cam follower differing in the cam lift, in the lever ratio of the rocker arm and the length of the push rod. Based on dynamic simulations, the best variant is then selected with better parameters of the intake and exhaust process with the same lift and timing compared to the initial design, and simultaneously lower demands on production technology.
Keywords in English
aircraft, Multi-body System, valve train, cam follower, kinematics, dynamics
Released
22.09.2021
Publisher
Česká zemědělská univerzita v Praze, Technická fakulta
Location
Praha
ISBN
978-80-213-3132-7
Book
Sborník přednášek KOKA 2021
Edition number
1
Pages from–to
65–70
Pages count
6
BIBTEX
@inproceedings{BUT172589,
author="Lubomír {Drápal} and Jan {Vopařil} and Kateřina {Fridrichová} and Jozef {Dlugoš},
title="Redesign and dynamics of the valve train of an aircraft engine",
booktitle="Sborník přednášek KOKA 2021",
year="2021",
month="September",
pages="65--70",
publisher="Česká zemědělská univerzita v Praze, Technická fakulta",
address="Praha",
isbn="978-80-213-3132-7"
}