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

Article of Honda R&D Technical Review Vol.26 No.2

Summary

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 capability, 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.

Reference

(1) Marples, V.: Dynamics of Machines, McGraw-Hill Publishing Company Limited, p.149-151 (1969)
(2) Nishida, K., Kaneko, T., Takahashi, Y., Aoki, K.: Estimation of Indicated Mean Effective Pressure Using Crankshaft Angular Velocity Variation, JSAE 20119510/SAE 2011-32-0510 (2011)
(3) Nishida, K., Kaneko, T., Takahashi, Y., Aoki, K.: Development of System to Estimate Indicated Mean Effective Pressure Using Crankshaft Angular Velocity Variation, Transactions of Society of Automotive Engineers of Japan, Vol.43 No.5, p.1033-1038 (2012)

Author (organization or company)

Hirotaka KAWATSU(Motorcycle R&D Center)、Ryosuke IBATA(Motorcycle R&D Center)、Tetsuya KANEKO(Motorcycle R&D Center)、Kenji NISHIDA(Motorcycle R&D Center)

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