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Characteristics of friction and lubrication on two-ring piston
326
Abstracts
modified the previously proposed measure by the spectrum pattern and the loudness of the sound according to the results of the two experiments for estimating the booming sensation of artificial sounds and real car interior noises: one for the effect of the spectrum pattern and the other for the effect of the loudness on the booming sensation. As a result, good correlation was obtained between the newly modified objective measure and the booming sensation. Balance Evaluation of Passenger Car Interior Noise 9535954 Evaluation of Sound Components of Passenger Car Interior Noise Hiroyuki Hoshino, Noriyoshi Terazawa, Yoshihiko Kozawa (Toyota Central Research & Development Labs., Inc.), Hiroyasu Katoh (Toyota Motor Corp.) This paper describes a method for objective evaluation of passenger car interior noise. Interior noise was evaluated by subjective evaluation tests and acoustic signal analysis of its sound components (engine noise, booming noise, road noise and wind noise) and their balance. We have established a balance evaluation method in which sound components acoustically divided are expressed by outstanding rate fitting human audition and total sound quality of interior noise is evaluated from the sound components’ balance. 9535963 Ergonomic Considerations of Vehicle Workplace Design Yasuhiro Inuzuka, Kazuhiko by Using 3-Dimensional Man Model Nakamoto, Kenji Kimura (Toyota Motor Corporation) Instead of a conventional method that many subjects practically evaluate workplace of an interior mock-up model, a new method using computer manikin and simple kinematic model was considered. In order to integrate ergonomic considerations into the early design process of workplace, 1) 3-dimensional manikin based on an anthropometric database and 2) its posture based on the characteristics of motion were examined, and 3) the agreement between simulation and subjective evaluation was confirmed. 9535972 Study on Predicting Passenger Vibration Discomfort Setsuo Maeda (Kinki University), Seishiroh Daimon (Matsushita InterTechno Co., Ltd) Measurements of vehicle vibration and passenger discomfort have been used to evaluate BS6841 methods of predicting passenger vibration discomfort. Twelve vibration inputs to the body were measured: three translational and three rotational axes on the seat, three translational axes at the back and three translational axes at the feet. The overall ride value calculated from these twelve value. This value provided the good index for Japanese discomfort ratings. .. 9535981 Seat Comfort of Motorcycle - Fatigue Reducing Motorcycle Seat Using a Newly Developed Shock Absorbing Material Satoshi Tanigaki, Kazuyoshi Kaneko (Yamaha Motor Co., Ltd.) In order to reduce motorcycle rider’s fatigue during long distance riding, a seat using a new shock absorbing material was developed and tested. In accordance with the sensory evaluation in actual riding, the laboratory tests such as the measurements in vibration transmissibility or seating pressure distribution indicated the improved comfort of the seat. 9535990 A Study of the Effects of Ceramics Valve Train Parts on Reduction of Engine Friction Evaluation of High Strength SiiN4 Tappet Shims by Motoring Apparatus Hiromu Izumida, Takao Hishioka, Akira Yamakawa, Kenji Matsunuma (Sumitomo Electric Industries. Ltd) Reduction of valve train friction is one of the effective methods for reducing engine friction. The developed Si3N4 adjusting shim with a mirror-finished surface has been evaluated by the motoring apparatus, the result shows that 20%-25% reduction of valve train friction torque. By using the shims, 2%-3% improvement ratio of fuel-consumption has been proved by the actual driving test, especially 4% improvement ratio by the accelerated mode.
9536007 Characteristics of Friction and Lubrication on Two-Ring Piston Masaaki Takiguchi, Hajime Ando, Takahiro Takimoto, Akiyoshi Uratsuka (Musashi Institute of Technology) This study was aimed at clarifying the characteristics of oil film thickness, piston friction, and oil consumption in the two-ring piston. As the results, it was found out that the oil film thickness of two-ring piston is thinner than that of the three-ring piston because of blow-by and the amount of oil consumption are kept at the same level of the conventional three ring piston. A quantitative analysis on the friction force and the relation between the oilconsumption and oil ring movement were also carried out through the experimental studies.
9536016 Effect of Piston Second Land Volume and Land Shape on Hideki Yoshida, Hiroyuki Kobayashi, Akira Sato Oil Consumption (Riken Corporation) The design of piston land shape and piston ring packs to reduce oil consumption have become increasingly important. Coupled simulations of ring dynamics, ring lubrication and second land gas dynamics were carried out using the software. In addition, it turned out that the modification of the second land shape influences the oil consumption. V shaped second land was reduced the oil consumption. The oil behavior in piston land was observed by CCD camera adapted to the liner with glass window.
9536025 Study on Cylinder Bore Deformation of Dry-liner in Engine Operation Hideshi Hitosugi, Katsuyuki Nagoshi, Masaki Ebina, Shoichi Furuhama (Musashi Institute of Technology) Cylinder bore deformation of reciprocating engines induce the increasing oil consumption, abnormal wear, etc. However, prediction of deformation on dry-liner has not been yet because of the complication of structure. This study was aimed at making clear the mechanism of the dry-liner deformation on actual engine operate condition. The effect of clearance between the liner and block, and mainly the mechanism of thermal deformation were made clear through the measurement of bore deformation by using a unique measuring device which has turning piston developed by the authors.
9536034 Blow-by Gas Volume Reduction of Water Cooled Gasoline Engine for Motorcycle Yoshinari Ninomiya, Kunio Arase, Teruhisa Odaka, Fuhito Watanabe (Suzuki Motor Corporation) This study is aimed at reduction of blow-by gas volume at wide-open throttle conditions to improve the durability of wear on piston ring-groove surface. The configurations of the top piston ring and its ring-grove were focused by the practical mesurement of blow-by gas volume. It was found that Wash-in angle of the top ring and dihedral angle of the piston ring-groove has much influence on the ring fluttering. Narrow gaps of the compression rings and the ring-groove chamfering contributed to reduction of blow-by gas volume.
9536043 Development of New Decompression Brake for Heavy Duty Engine - Part 1: Development of Operation System and Performance Yoshinari Imai, Satoshi Maeda (Nissan Diesel Motor Co., Ltd.), Akira Torii (Unisia Jets Co., Ltd.) We have developed a new decompression brake which incorporates an original operation mechanism in answer to user demands for more powerful brake performance on vehicles. This decompression brake improves braking performance by more than 50% when compared with a conventional exhaust brake, when operated in tandem with an exhaust brake. The decompression on brake contributes to safe driving, to alleviate driver fatigue, and to prolong brake lining life. This paper reports on the following subjects: (1) Tests results and performance analysis based on bench and road tests (2) The principle behind and development of an original operation system
Abstracts
modified the previously proposed measure by the spectrum pattern and the loudness of the sound according to the results of the two experiments for estimating the booming sensation of artificial sounds and real car interior noises: one for the effect of the spectrum pattern and the other for the effect of the loudness on the booming sensation. As a result, good correlation was obtained between the newly modified objective measure and the booming sensation. Balance Evaluation of Passenger Car Interior Noise 9535954 Evaluation of Sound Components of Passenger Car Interior Noise Hiroyuki Hoshino, Noriyoshi Terazawa, Yoshihiko Kozawa (Toyota Central Research & Development Labs., Inc.), Hiroyasu Katoh (Toyota Motor Corp.) This paper describes a method for objective evaluation of passenger car interior noise. Interior noise was evaluated by subjective evaluation tests and acoustic signal analysis of its sound components (engine noise, booming noise, road noise and wind noise) and their balance. We have established a balance evaluation method in which sound components acoustically divided are expressed by outstanding rate fitting human audition and total sound quality of interior noise is evaluated from the sound components’ balance. 9535963 Ergonomic Considerations of Vehicle Workplace Design Yasuhiro Inuzuka, Kazuhiko by Using 3-Dimensional Man Model Nakamoto, Kenji Kimura (Toyota Motor Corporation) Instead of a conventional method that many subjects practically evaluate workplace of an interior mock-up model, a new method using computer manikin and simple kinematic model was considered. In order to integrate ergonomic considerations into the early design process of workplace, 1) 3-dimensional manikin based on an anthropometric database and 2) its posture based on the characteristics of motion were examined, and 3) the agreement between simulation and subjective evaluation was confirmed. 9535972 Study on Predicting Passenger Vibration Discomfort Setsuo Maeda (Kinki University), Seishiroh Daimon (Matsushita InterTechno Co., Ltd) Measurements of vehicle vibration and passenger discomfort have been used to evaluate BS6841 methods of predicting passenger vibration discomfort. Twelve vibration inputs to the body were measured: three translational and three rotational axes on the seat, three translational axes at the back and three translational axes at the feet. The overall ride value calculated from these twelve value. This value provided the good index for Japanese discomfort ratings. .. 9535981 Seat Comfort of Motorcycle - Fatigue Reducing Motorcycle Seat Using a Newly Developed Shock Absorbing Material Satoshi Tanigaki, Kazuyoshi Kaneko (Yamaha Motor Co., Ltd.) In order to reduce motorcycle rider’s fatigue during long distance riding, a seat using a new shock absorbing material was developed and tested. In accordance with the sensory evaluation in actual riding, the laboratory tests such as the measurements in vibration transmissibility or seating pressure distribution indicated the improved comfort of the seat. 9535990 A Study of the Effects of Ceramics Valve Train Parts on Reduction of Engine Friction Evaluation of High Strength SiiN4 Tappet Shims by Motoring Apparatus Hiromu Izumida, Takao Hishioka, Akira Yamakawa, Kenji Matsunuma (Sumitomo Electric Industries. Ltd) Reduction of valve train friction is one of the effective methods for reducing engine friction. The developed Si3N4 adjusting shim with a mirror-finished surface has been evaluated by the motoring apparatus, the result shows that 20%-25% reduction of valve train friction torque. By using the shims, 2%-3% improvement ratio of fuel-consumption has been proved by the actual driving test, especially 4% improvement ratio by the accelerated mode.
9536007 Characteristics of Friction and Lubrication on Two-Ring Piston Masaaki Takiguchi, Hajime Ando, Takahiro Takimoto, Akiyoshi Uratsuka (Musashi Institute of Technology) This study was aimed at clarifying the characteristics of oil film thickness, piston friction, and oil consumption in the two-ring piston. As the results, it was found out that the oil film thickness of two-ring piston is thinner than that of the three-ring piston because of blow-by and the amount of oil consumption are kept at the same level of the conventional three ring piston. A quantitative analysis on the friction force and the relation between the oilconsumption and oil ring movement were also carried out through the experimental studies.
9536016 Effect of Piston Second Land Volume and Land Shape on Hideki Yoshida, Hiroyuki Kobayashi, Akira Sato Oil Consumption (Riken Corporation) The design of piston land shape and piston ring packs to reduce oil consumption have become increasingly important. Coupled simulations of ring dynamics, ring lubrication and second land gas dynamics were carried out using the software. In addition, it turned out that the modification of the second land shape influences the oil consumption. V shaped second land was reduced the oil consumption. The oil behavior in piston land was observed by CCD camera adapted to the liner with glass window.
9536025 Study on Cylinder Bore Deformation of Dry-liner in Engine Operation Hideshi Hitosugi, Katsuyuki Nagoshi, Masaki Ebina, Shoichi Furuhama (Musashi Institute of Technology) Cylinder bore deformation of reciprocating engines induce the increasing oil consumption, abnormal wear, etc. However, prediction of deformation on dry-liner has not been yet because of the complication of structure. This study was aimed at making clear the mechanism of the dry-liner deformation on actual engine operate condition. The effect of clearance between the liner and block, and mainly the mechanism of thermal deformation were made clear through the measurement of bore deformation by using a unique measuring device which has turning piston developed by the authors.
9536034 Blow-by Gas Volume Reduction of Water Cooled Gasoline Engine for Motorcycle Yoshinari Ninomiya, Kunio Arase, Teruhisa Odaka, Fuhito Watanabe (Suzuki Motor Corporation) This study is aimed at reduction of blow-by gas volume at wide-open throttle conditions to improve the durability of wear on piston ring-groove surface. The configurations of the top piston ring and its ring-grove were focused by the practical mesurement of blow-by gas volume. It was found that Wash-in angle of the top ring and dihedral angle of the piston ring-groove has much influence on the ring fluttering. Narrow gaps of the compression rings and the ring-groove chamfering contributed to reduction of blow-by gas volume.
9536043 Development of New Decompression Brake for Heavy Duty Engine - Part 1: Development of Operation System and Performance Yoshinari Imai, Satoshi Maeda (Nissan Diesel Motor Co., Ltd.), Akira Torii (Unisia Jets Co., Ltd.) We have developed a new decompression brake which incorporates an original operation mechanism in answer to user demands for more powerful brake performance on vehicles. This decompression brake improves braking performance by more than 50% when compared with a conventional exhaust brake, when operated in tandem with an exhaust brake. The decompression on brake contributes to safe driving, to alleviate driver fatigue, and to prolong brake lining life. This paper reports on the following subjects: (1) Tests results and performance analysis based on bench and road tests (2) The principle behind and development of an original operation system