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Development of Cylinder Pressure Sensor Integrated with Direct Injector

Article of Honda R&D Technical Review Vol.24 No.1

Summary

Polycrystalline piezo-electric element-type cylinder pressure sensors developed thus far require correction of the output characteristics due to pyroelectricity and other factors. This type of sensors also made it necessary to use plug clamp-type sensors, which had a large influence on engine layout.
This issue was addressed by integrating a single crystal piezo-electric element-type cylinder pressure sensor with a direct injector, and this paper introduces the effects and characteristics of this new sensor. Use of an integrated sensor and injector structure provided commonality with existing parts and enabled easy installation in turbocharged engines with direct injection that are expected to become widespread in the future. In addition, with regards to cylinder pressure detectability, the use of single crystal piezo-electric elements with good temperature characteristics achieved a detection accuracy of ±3% compared to the reference sensor (Kistler (6052B)). Furthermore, the knocking waveform detectability was also confirmed to be the same level as that of the reference sensor.

Reference

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(2) Sawamoto, K., Kawamura, Y., Kita, T.: Individual Cylinder Knock Control by Detecting Cylinder Pressure, SAE Paper, 871911 (1987)
(3) Kusakabe, H., Okauchi, T., Takirawa, M.: A Cylinder Pressure Sensor for Internal Combustion Engine, SAE Paper, 920701 (1992)
(4) Wlodrczyk, M. T.: High Accuracy Glow Plug-integrated Cylinder Pressure Sensor for Closed Loop Engine Control, SAE Paper, 2006-01-0184
(5) Hasegawa, M., Shimasaki, Y., Yamaguchi, S., Kobayashi, M., Sakamoto, H., Kitayama, N., Kanda, T.: Study on ignition Timing Control for Diesel Engines Using In-Cylinder Pressure Sensor, SAE Paper, 2006-01-0180
(6) Shimasaki, Y., Kobayashi, M., Sakamoto, H., Ueno, M., Hasegawa, M., Yamaguchi, S., Suzuki, T.: Study on Engine Management System Using In-cylinder Pressure Sensor Integrated with Spark Plug, SAE Paper, 2004-01-0519
(7) Murai, H., Kameshima, A., Moriya, H., Miyamoto, Y.: Glow Plug with Combustion Pressure Sensor, Denso Technical Review, Vol. 8, No. 2, p. 74-78 (2003)
(8) Yamamoto, Y., Akazaki, S., Ohara, M., Mizuno, H.: Development of Cylinder Pressure Measurement System Using Adaptive Calculation, SAE Paper, 2008-01-1009
(9) Okuyama, T., Fukuzawa, T., Hashimoto, A.: Development of V10 500HP Engine -Technologies for High-performance and Low-emission Clean Powertrain-, Honda R&D Technical Review, October, 2010, p. 41-49

Author (organization or company)

Yuji YAMAMOTO(Automobile R&D Center)、Gaku SATO(Keihin Corporation)、Takayuki HAYASHI(CITIZEN FINETECH MIYOTA CO., LTD.)

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