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Development of Closed-Loop Robust Control System for Diesel Engines - Combustion Monitoring by Crank Angular Velocity Analysis and its Applications -

Toyota Motor Corporation-Yukitoshi Aoyama, Ryo Hasegawa, Tomomi Yamada, Takekazu Itoh, Terutoshi Tomoda, Yuichi Shimasaki
Published 2012-04-16 by SAE International in United States
Closed-loop robust control system that can monitor combustion state and control it into optimal state using crank angular velocity analysis was established. The system can be constructed without any change of the current hardware. It can avoid engine stall, deterioration of drivability and white smoke emission by misfire after filling low cetane fuels. This study was attempted to grasp the frequency characteristics of crank angular velocity both normal combustion and misfire with FFT (Fast Fourier Transform) and Wavelet Transform. FFT used for frequency analysis is generic method to acquire the frequency characteristics of steady oscillation, however is unsuitable for acquiring the frequency characteristics of transient oscillation. Therefore authors adopted Wavelet Transform and succeeded in grasping the phenomenon in misfiring in time sequential. With this knowledge, this study was attempted to determine the combustion instability by extracting frequency element of the 0.5 order of engine speed that is the characteristic frequency element in misfiring from pulse signal of the crank angle sensor with digital filters. With this method, misfire and combustion instability with white smoke caused…
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Study on Ignition Timing Control for Diesel Engines Using In-Cylinder Pressure Sensor~Measures to Counter Fuel Cetane Number and EGR Effect

Honda R&D Co., Ltd.-Yuichi Shimasaki, Mamoru Hasegawa, Satoshi Yamaguchi, Makoto Kobayashi, Hideki Sakamoto, Naoto Kitayama, Tomohiro Kanda
  • Technical Paper
  • 2006-05-0354
Published 2006-10-22 by Society of Automotive Engineers of Japan in Japan
The diesel engine with its high thermal efficiency is considered to be more advantageous than the gasoline engine with regard to the issue of global warming (reduction of CO2 emissions), but technology for the after-treatment of emission gases in the diesel engine is still being developed and the diesel engine clearly requires work to match the gasoline engine in terms of emission gases from the tail pipe. However, many new concepts about combustion have been proposed and are being developed for mass production for combustion technology that simultaneously maintains the current high thermal efficiency and reduces particulate matter (PM) and nitrogen oxide (NOx) emissions, including premixed charge compression ignition (PCCI) and low-temperature combustion.However, with these combustion technologies, there is the issue that the heat release is unstable compared with that of conventional combustion, thus easily affected by fuel properties and operation conditions. This is because the high rate of premixed combustion is generated due to further retarding ignition through changes in the fuel injection timing, increasing the exhaust gas recirculation (EGR) ratio and removing the…
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Study on Ignition Timing Control for Diesel Engines Using In-Cylinder Pressure Sensor

Honda R&D Co., Ltd.-Mamoru Hasegawa, Yuichi Shimasaki, Satoshi Yamaguchi, Makoto Kobayashi, Hideki Sakamoto, Naoto Kitayama, Tomohiro Kanda
Published 2006-04-03 by SAE International in United States
As technologies for simultaneously maintaining the current high thermal efficiency of diesel engines and reducing particulate matter (PM) and nitrogen oxide (NOX) emissions, many new combustion concepts have been proposed, including premixed charge compression ignition (PCCI) and low-temperature combustion[1].However, it is well known that since such new combustion techniques precisely control combustion temperatures and local air-fuel ratios by varying the amount of air, the exhaust gas recirculation (EGR) ratio and the fuel injection timing, they have the issues of being less stable than conventional combustion techniques and of performance that is subject to variance in the fuel and driving conditions.This study concerns a system that addresses these issues by detecting the ignition timing with in-cylinder pressure sensors and by controlling the fuel injection timing and the amount of EGR for optimum combustion onboard. This system was able to attain both cleaner emission gases and stable combustion without being affected by external factors such as the cetane number of the fuel, even with PCCI where combustion is relatively unstable.
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Study on Combustion Monitoring System for Formula One Engine (Part 2)

Honda Technical Research Institute-Yuichi Shimasaki, Junko Sakaguchi, Hidetaka Maki, Hiroaki Suzuki
NGK Spark Plug-Noriaki Kondo, Tatsunori Yamada
  • Technical Paper
  • 2005-08-0002
Published 2005-05-18 by Society of Automotive Engineers of Japan in Japan
To cope with Formula One engine's durability issues, we have made constant combustion monitoring system for malfunctions and failures. The research program described in this paper deals with an onboard technology for monitoring combustion under all of the operational conditions using ionic current measurement. The technology will possibly be applied to engine management and car-to-pit communications via telemetering. With measurement accuracy and reliability maintained at a high level, these controls have been effectively utilized not only in the Formula One World Championship but also in the CART World Series. This paper also briefly describes the relationship between the spark plug center electrode configuration and the amount of ionic current measurable.
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Study on Combustion Monitoring System for Formula One Engines (Part 1)

Yuichi Shimasaki, Junko Sakaguchi, Hidetaka Maki, Hiroaki Suzuki, Noriaki Kondo, Tatsunori Yamada
  • Technical Paper
  • 2004-08-0526
Published 2004-10-27 by Society of Automotive Engineers of Japan in Japan
To cope with Formula One engine's durability issues, we have made constant combustion monitoring system for malfunctions and failures. The research program described in this paper deals with an onboard technology for monitoring combustion under all of the operational conditions using ionic current measurement. The technology will possibly be applied to engine management and car-to-pit communications via telemetering. With measurement accuracy and reliability maintained at a high level, these controls have been effectively utilized not only in the Formula One World Championship but also in the CART World Series.
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Study on Combustion Monitoring System for Formula One Engines Using Ionic Current Measurement

Honda R&D Co., Ltd.-Yuichi Shimasaki, Hidetaka Maki, Junko Sakaguchi, Kazutoshi Nishizawa, Akira Kato, Hiroaki Suzuki
NGK SPARK PLUG Co., Ltd.-Noriaki Kondo, Tatsunori Yamada
Published 2004-06-08 by SAE International in United States
Formula One engines, which are the pursuit of the ultimate in performance, tend to be comparatively vulnerable to durability issues. These engines sometimes run under a state of unstable combustion as compensation for improved fuel economy. To cope with these issues, there have been strong demands in the racing field for a technology that will allow constant monitoring and prompt action to be carried out on system malfunctions and failures, as well as unstable combustion. The research program described in this paper deals with an onboard technology for monitoring combustion under all the operational conditions using ionic current measurement. The technology will possibly be applied to engine management and car-to-pit communications via telemetering. The scope of the control it offers includes; detection of misfire and hesitation, detection and management of detonation, and management of lean-burn combustion. With measurement accuracy and reliability maintained at a high level, these controls have been effectively utilized not only in the Formula One World Championship but also in the CART World Series.This paper also briefly describes the relationship between the…
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Study on Engine Management System Using In-cylinder Pressure Sensor Integrated with Spark Plug

Honda R&D Co., Ltd.-Yuichi Shimasaki, Makoto Kobayashi, Hideki Sakamoto, Masaki Ueno, Mamoru Hasegawa, Satoshi Yamaguchi
NGK SPARK PLUG Co., Ltd.-Takahiro Suzuki
Published 2004-03-08 by SAE International in United States
There has been strong public demand for reduced hazardous exhaust gas emissions and improved fuel economy for automobile engines. In recent years, a number of innovative solutions that lead to a reduction in fuel consumption rate have been developed, including in-cylinder direct injection and lean burn combustion technologies, as well as an engine utilizing a large volume of exhaust gas recirculation (EGR). Furthermore, a homogeneous charge compression ignition (HCCI) engine is under development for actual application. However, one of the issues common to these technologies is less stable combustion, which causes difficulty in engine management. Additionally, it is now mandatory to provide an onboard diagnosis (OBD) system. This requires manufacturers to develop a technology that allows onboard monitoring and control of the combustion state. This paper reports on an innovative combustion diagnostic method using an in-cylinder pressure sensor.As a key to the monitoring and controlling system, a new in-cylinder pressure sensor was developed that is integrated with the spark plug. This type of sensing device features advantages in durability and reliability, which are two fundamental…
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Development of Extruded Electrically Heated Catalyst System for ULEV Standards

Honda R&D Co., Ltd.-Yuichi Shimasaki, Hiroaki Kato
NGK Ceramics USA, Inc.-Takahisa Kaneko
Published 1997-02-24 by SAE International in United States
Into the early-part of the next century, automotive emission standards are becoming stricter around the world. The electrically-heated catalyst (EHC) is well known as an effective technology for the reduction of cold-start hydrocarbon emissions without a significant increase in back pressure. Our extruded, alternator powered EHC (APEHC) manufactured with a unique canning method and equipped with a reliable, water proof electrode has demonstrated excellent durability and reliability, as stated in our previous SAE paper (#960340).The APEHC system discussed in this paper has achieved the Ultra-Low-Emission Vehicle (ULEV) standards, after 100,000 miles of fleet testing, without any failure. This is the final milestone in addressing the EHC as a realistic-production technology for ULEV.With the ability to meet ULEV/Stage III emission targets without a significant increase in back pressure, the EHC will be applied to an especially high performance vehicle with a large displacement engine. For the operating characteristics of this application, higher durability and emission performance of the EHC is required. A newly-designed EHC with a smaller element diameter eliminated substrate deformation and increased the natural…
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Study on Electrically Heated Catalyst (Ehc) System - Part 1: Ehc System and Its Emission Reduction Effect

Honda R and D Co., Ltd.-Hiroaki Kato, Yuichi Shimasaki, Hironao Fukuchi, Akihisa Saito, Takuya Aoki
  • Technical Paper
  • 968359
Published 1996-10-22 by Society of Automotive Engineers of Japan in Japan
The use of the EHC and electric pump secondary air system, which heat and activate the catalytic converter immediately after the cold start, make it possible for high performance 4-2-1 exhaust system with underfloor catalytic converter to meet the strict CARB ULEV regulation. Also, features of various EHCs and power loss due to the EHC installation are reported.
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Study on Electrically Heated Catalyst (Ehc) System - Part 2: Onboard Diagnosis Systems (Obd-Ii) for Ehc and Secondary Air System

Honda R and D Co., Ltd.-Hiroaki Kato, Yuichi Shimasaki, Hironao Fukuchi, Akihisa Saito, Takuya Aoki
  • Technical Paper
  • 968360
Published 1996-10-22 by Society of Automotive Engineers of Japan in Japan
This report deals with the OBD-II of emission control systems, i.e., EHC and electrically-operated pump secondary air systems. The study revealed that OBD-II monitoring of the two systems is possible using non-contact Hall-element electric load sensor and voltage detection. Also reported is that the deterioration of catalytic effect is more easily detectable when the EHC is used.