Your Selections

Tanabe, Hideaki
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Study on Impinging Diffusion DI Diesel Engine - Numerical Study on Effect of Impinging Part on In-Cylinder Flow -

Gunma University-Hideaki Tanabe
Kanazawa Institute of Technology-Satoshi Kato
Published 2003-05-19 by SAE International in United States
The effects of the spray impinging part on the in-cylinder airflow were numerically analyzed in the combustion chamber of the impinging diffusion direct injection diesel engine using KIVA-3 code. KIVA-3 code was enhanced to cater the impinging part as an internal obstacle by adopting the virtual droplet method, which is relatively easy to implement.Numerical result shows that the turbulence generation is promoted by the impinging part and is transformed by the squish flow into the piston cavity. The secondary flow is generated beneath the impinging part as well. The secondary flow area increases as the distance between top surface of the impinging part and bottom surface of the cylinder cover increases.
Annotation ability available

Development of a direct-injection diesel engine with mixture formation by fuel spray impingement

Fuji Heavy Industries Ltd.-Kenshi Fujita
Gunma Univ.-Hideaki Tanabe
  • Technical Paper
  • 2000-05-0102
Published 2000-06-12 by Society of Automotive Engineers of Korea in South Korea
The mixture formation by fuel spray impingement (OSKA system) was applied to a small direct-injection diesel engine in order to reduce the wall quenching- induced emissions, i.e., the emissions of THC and soluble organic fractions (SOF).Experiments were carried out using a single-cylinder engine, fitted with various piston cavity geometries, ran under a wide range of compression ratios and fuel injection specifications. The piston cavity was designed as a centrally located reentrant type. The combination of the high squish flow and the weak penetration of the OSKA spray was very effective in reducing harmful emissions. A short ignition delay, under the retarded fuel injection timing, was obtained because of the high compression ratio. The OSKA DI diesel engine showed reduced NOx, smoke, and THC emissions without deterioration of the fuel consumption compared to modern DI diesel engines used in automotive applications. While PM emissions were partially reduced, simultaneous reduction of NOx and PM was not obtained.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Study on particulate formation mechanism in DI diesel engine~Effect of dimethyl carbonate addition

Gunma Univ.-Hideaki Tanabe
Kanazawa Institute of Technology-Mitsutaka Oikawa, Satoshi Kato, G. Takeshi Sato
  • Technical Paper
  • 1999-08-0212
Published 1999-05-19 by Society of Automotive Engineers of Japan in Japan
This paper is concerned with the particulate matter (PM) formation in direct-injection (DI) diesel engines. A system featuring an electromagnetically actuated sampling valve was used for sampling PM from the combustion chamber. The concentration of total particulate matter (TPM) and of two components, the soluble organic fractions (SOF) and insoluble fractions (ISF) were determined at different locations in the combustion chamber at different sampling timings. Conventional gas oil and 5% of dimethyl carbonate (DMC) added fuel were used. The results suggested that the PM formation was significantly affected by the wall quenching effects. The less PM was observed with DMC-added fuel for both in the combustion chamber and in the exhaust emission.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Study on a Small Diesel Engine With Direct Injection Impinging Distribution Spray Combustion System-Optimum of Injection System and Combustion Chamber

Gunma Univ.-Hideaki Tanabe
Kanazawa Institute of Technology-Kenshi Fujita, Satoshi Kato, G. Takeshi Sato
  • Technical Paper
  • 978220
Published 1997-10-21 by Society of Automotive Engineers of Japan in Japan
This study is concerned with a small bore (93 mm) diesel engine using impinged fuel spray, named OSKA system. The higher rate of injection show lower smoke emission with higher NOx emission. The exhaust emission and performance were investigated under different compression ratio with higher rate of injection. The experimental results show that this OSKA system is capable for reducing the smoke emission without the deterioration of NOx emission and fuel consumption compared with the conventional DI diesel engine.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Investigation of Particulate Formation of DI Diesel Engine with Direct Sampling from Combustion Chamber

Gunma Univ.-Hideaki Tanabe
Kanazawa Institute of Technology-Satoshi Kato, Yoshitaka Takayama, G. Takeshi Sato, Takeshi G. Sato
Published 1997-10-01 by SAE International in United States
This paper is concerned with the formation of Particulate Matter (PM) in direct-injection (DI) diesel engines. A system featuring an electromagnetically actuated sampling valve was used for sampling of gas directly from the combustion chamber. The concentrations of total particulate matter (TPM) and of its two components, the Soluble Organic Fractions (SOF) and the Insoluble Fractions (ISF), were determined at different locations in the combustion chamber at different sampling times (different crank angles). High concentrations of SOF were found at sampling positions along the spray flame axis. The concentrations of SOF and ISF were higher at sampling positions close to the wall than away from the wall. The results suggest that SOF formation is significantly affected by wall quenching. Also, the PM concentrations were much higher in the combustion chamber than in the exhaust.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Study on a Small Diesel Engine With Direst Injection Impinging Distribution Spray Combustion System

Daihatsu Diesel-Toshiaki Makino
Gunma Univ.-Hideaki Tanabe
  • Technical Paper
  • 968310
Published 1996-10-22 by Society of Automotive Engineers of Japan in Japan
This study is concerned with small bore (93mm) diesel engine using impinged fuel spray, named OSKA system. The exhaust emission and performance were investigated under different fuel injection nozzle, nozzle opening pressure and fuel pump. The higher rate of injection show lower smoke emission with slightly higher NOx emission. The experimental results show that this OSKA system is capable for reducing the smoke emission without the deterioration of NOx emission and fuel consumption compared with the conventional DI diesel engine.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Combustion Observation of OSKA-DH Diesel Engine by High-Speed Photography and Video System

Kanazawa Institute of Technology-Satoshi Kato, Kenshi Fujita, Hideaki Tanabe, G. Takeshi Sato
Nippon Clean Engine Laboratory Co.-Shigeru Onishi
Published 1996-05-01 by SAE International in United States
The OSKA-DH diesel engine employed a unique system (hereafter called OSKA system) which is composed of a single-hole fuel injector, an impinging disk and a re-entrant type combustion chamber.This study is concerned with the combustion observation of both OSKA-DH diesel engine and conventional DI diesel engine by the high-speed photography and video system. This video system enables us to take combustion photographs under the warm-up condition of the engine.From the observation of those photographs, the OSKA-DH engine shows the shorter ignition delay compared with a DI diesel engine and the combustion flame of OSKA-DH diesel engine are concentrated in the center of the combustion chamber and a relatively monotonous flame intensity are observed.THE AUTHORS HAVE DEVELOPED a new type of Direct Injection Stratified Charge Engine called “Direct Fuel Injection Impingement Diffusion Stratified Charge System” (hereafter called OSKA System).The authors have already reported the performance and exhaust emission of the methanol, gasoline and diesel engines utilizing this OSKA System (1), (2), (3), (4), (5), (6), (7), (8), (9), (10) and (11)*.In the previous reports (8), (9),…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Speed Control Algorithm for An Automated Driving Vehicle

University of Tokyo-Kenichi Yoshimoto, Hideaki Tanabe, Miki Tanaka
  • Technical Paper
  • 948226
Published 1994-10-24 by Society of Automotive Engineers of Japan in Japan
Recently, we proposed a model of driver's speed control behavior, which was based on the relative distance to the ahead obstacle and the acceleration felt by driver. This proposed model is expected to be applicable to the speed control algorithm of the automated driving vehicle.In this study, the feasibilities of this control algorithm are investigated at the situation of the mixed traffic of automated driving vehicles and manual driving vehicles, making uses of computer simulation experiments and feeling tests concerning the riding comfort of the automated driving vehicles which are carried out on a driving simulator with a stereo-graphic vision system.The applicability of this speed control algorithm to the automated driving system is confirmed
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Particulate Emission Characteristics from an Impingement Diffusion Direct Injection Diesel Engine

Kanazawa Institute of Technology-Hideaki Tanabe, Masashi Takahashi, G. Takeshi Sato
Nippon Clean Engine Lab.-Satoshi Kato, Shigeru Onishi
Published 1994-10-01 by SAE International in United States
A new mixture formation and combustion process for reducing both emissions and fuel consumption has been developed, where the fuel impinges onto the impinging surface and spreads into the free space, named the OSKA process. A single cylinder engine particulate emission test was conducted with full flow dilution tunnel. The OSKA process shows lower TPM (total particulate matter) emission than the conventional DI diesel at the corresponding operating condition.ISF(insoluble fractions) and SOF(soluble organic fraction) are lower than DI diesel's. Correlation between SOF and THC of OSKA engine is, however different from that of conventional DI diesel. OSKA emits lower THC than conventional DI diesel does at the same SOF emission. This is because the wall quenching effect is smaller in OSKA than in conventional DI diesel.A NEW MIXTURE FORMATION and combustion technology, impinging diffusion one named OSKA, has been developed by the authors. The authors have reported the exhaust and performance characteristics of the OSKA system. The OSKA system has relatively low exhaust emission characteristics as well as low fuel consumption performance(1, 2 and 3).…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Experimental Study on Unsteady Gas Jet

Kanazawa Institute of Technology-Hideaki Tanabe, G. Takeshi Sato
Published 1994-10-01 by SAE International in United States
In order to clarify the mixture formation process of the direct injection gas engine, helium gas was injected into a quiescent atmosphere. The time- and space-resolved velocity, pressure and concentration distributions were measured in the free unsteady gas jet and in the wall impinging unsteady gas jet. They were also obtained for the unsteady gas jet impinging onto a projection on a wall to enhance mixture formation.Empirical equations for the unsteady free jet were obtained, and the mixture formation mechanism of the wall impinging unsteady gas jet were clarified. The unsteady gas jet impinging onto the projection on a wall entrains much more air than the unsteady wall impinging jet.
Annotation ability available