Application of Engine Load Estimation Method Using Crank Angular Velocity Variation to Spark Advance Control

Event
SAE/JSAE 2014 Small Engine Technology Conference & Exhibition
Authors Abstract
Content
The technology to estimate engine load using the amplitude of crankshaft angular velocity variation during a cycle, which is referred to as “Δω (delta omega)”, in a four-stroke single-cylinder gasoline engine has been established in our former studies. This study was aimed to apply this technology to the spark advance control system for small motorcycles. The cyclic variation of the Δω signal, which affects engine load detection accuracy, was a crucial issue when developing the system. To solve this issue, filtering functions that can cope with various running conditions were incorporated into the computation process that estimates engine loads from Δω signals. In addition, the system made it possible to classify engine load into two levels without a throttle sensor currently used. We have thus successfully developed the new spark advance system that is controlled in accordance with the engine speed and load.
Meta TagsDetails
DOI
https://doi.org/10.4271/2014-32-0065
Pages
10
Citation
Ibata, R., Kawatsu, H., Kaneko, T., and Nishida, K., "Application of Engine Load Estimation Method Using Crank Angular Velocity Variation to Spark Advance Control," SAE Int. J. Engines 8(1):165-174, 2015, https://doi.org/10.4271/2014-32-0065.
Additional Details
Publisher
Published
Nov 11, 2014
Product Code
2014-32-0065
Content Type
Journal Article
Language
English