Introductory Study of Variable Valve Actuation for Pneumatic Hybridization
(2007)- Abstract
- Urban traffic involves frequent acceleration and deceleration. During deceleration, the energy previously used to accelerate the vehicle is mainly wasted on heat generated by the friction brakes. If this energy that is wasted in traditional IC engines could be saved, the fuel economy would improve. One solution to this is a pneumatic hybrid using variable valve timing to compress air during deceleration and expand air during acceleration. The compressed air can also be utilized to supercharge the engine in order to get higher load in the first few cycles when accelerating. A Scania D12 single-cylinder diesel engine has been converted for pneumatic hybrid operation and tested in a laboratory setup. Pneumatic valve actuators have been used... (More)
- Urban traffic involves frequent acceleration and deceleration. During deceleration, the energy previously used to accelerate the vehicle is mainly wasted on heat generated by the friction brakes. If this energy that is wasted in traditional IC engines could be saved, the fuel economy would improve. One solution to this is a pneumatic hybrid using variable valve timing to compress air during deceleration and expand air during acceleration. The compressed air can also be utilized to supercharge the engine in order to get higher load in the first few cycles when accelerating. A Scania D12 single-cylinder diesel engine has been converted for pneumatic hybrid operation and tested in a laboratory setup. Pneumatic valve actuators have been used to make the pneumatic hybrid possible. The actuators have been mounted on top of the cylinder head of the engine. A pressure tank has been connected to one of the inlet ports and one of the inlet valves has been modified to work as a tank valve. The goal has been to test and evaluate 2 different modes – compression mode (CM) where air is stored in an air tank during deceleration and air-motor mode (AM) where the previously stored pressurized air is used for accelerating the vehicle. This paper also includes an optimization of the CM. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/538503
- author
- Trajkovic, Sasa LU ; Tunestål, Per LU and Johansson, Bengt LU
- organization
- publishing date
- 2007
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- variable valve timing, pneumatic, hybrid
- host publication
- SAE technical paper series
- publisher
- SAE
- external identifiers
-
- scopus:85072430851
- project
- Pneumatic Hybrid Engine
- language
- English
- LU publication?
- yes
- id
- c21c8ecd-9e1b-4653-89a1-d137ef9d97c1 (old id 538503)
- alternative location
- http://www.sae.org/technical/papers/2007-01-0288
- date added to LUP
- 2016-04-04 11:36:09
- date last changed
- 2022-02-06 07:31:20
@inproceedings{c21c8ecd-9e1b-4653-89a1-d137ef9d97c1,
abstract = {{Urban traffic involves frequent acceleration and deceleration. During deceleration, the energy previously used to accelerate the vehicle is mainly wasted on heat generated by the friction brakes. If this energy that is wasted in traditional IC engines could be saved, the fuel economy would improve. One solution to this is a pneumatic hybrid using variable valve timing to compress air during deceleration and expand air during acceleration. The compressed air can also be utilized to supercharge the engine in order to get higher load in the first few cycles when accelerating. A Scania D12 single-cylinder diesel engine has been converted for pneumatic hybrid operation and tested in a laboratory setup. Pneumatic valve actuators have been used to make the pneumatic hybrid possible. The actuators have been mounted on top of the cylinder head of the engine. A pressure tank has been connected to one of the inlet ports and one of the inlet valves has been modified to work as a tank valve. The goal has been to test and evaluate 2 different modes – compression mode (CM) where air is stored in an air tank during deceleration and air-motor mode (AM) where the previously stored pressurized air is used for accelerating the vehicle. This paper also includes an optimization of the CM.}},
author = {{Trajkovic, Sasa and Tunestål, Per and Johansson, Bengt}},
booktitle = {{SAE technical paper series}},
keywords = {{variable valve timing; pneumatic; hybrid}},
language = {{eng}},
publisher = {{SAE}},
title = {{Introductory Study of Variable Valve Actuation for Pneumatic Hybridization}},
url = {{https://lup.lub.lu.se/search/files/5811689/625824.pdf}},
year = {{2007}},
}