This paper addresses issues associated with the measurement and analysis of crank angle based cylinder pressure to obtain accurate knock data. Issues examined include knock model features, the effect of sample size, the impact of sampling frequency, optimum knock windowing and the influence of transducer in-cylinder location and mounting arrangement.The study has demonstrated that a very large sample size is required to obtain good repeatability and at least 1000 engine cycles is recommended for knock intensity determination. A knock window of TDC to TDC+40 degrees has been shown to be appropriate whilst a 0.2 degree crank angle resolution is considered to be adequate for the knock algorithm employed. This work has also confirmed that transducers should have high natural frequency, be flush mounted to avoid cavity resonance and that knock signals can be significantly influenced by transducer location.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Gasoline Engine Knock Analysis using Cylinder Pressure Data


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1998



    Publication date :

    1998-02-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Gasoline engine knock analysis using cylinder pressure data

    Brunt,M.F. / Pond,C.R. / Biundo,J. et al. | Automotive engineering | 1998


    A Cylinder Pressure-Based Knock Detection Method for Pre-chamber Ignition Gasoline Engine

    Priyadarshi, Sahu / Ellis, Mark / Nazha, Marouan et al. | SAE Technical Papers | 2021


    A Knock Control System for Gasoline Engine Based on the Detection of Cylinder Pressure Wave

    Li, J. / Gu, X. / Wu, D. | British Library Online Contents | 1997


    Engine knock margin control using in-cylinder pressure data: preliminary results

    Panzani, Giulio / GALLUPPI, OLGA / Selmanaj, Donald et al. | BASE | 2017

    Free access

    Gasoline Engine Combustion - Compression Ratio and Knock

    Overington,M.T. / Thring,R.H. / Ricardo,GB | Automotive engineering | 1981