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Development of 2WAY clutch system for dry hybrid belt CVT
Abstracts
combination with numerical optimization software (DOC/DOT) was tried to use for optimization. Various design problems such as body, chassis, and engine parts design were solved to demonstrate the effectiveness and the robustness of the present approach for automotive applications.
9534126 Development of a Topology Optimization Analysis Method for Coupled Structural-Acoustic System and Application to Vehicle Interior Noise Reduction Wakae Kozukue, Ichiro Hagiwara (Nissan Motor Co., Ltdl A toplogy optimization technique based on the homogenization method was applied to a coupled structural-acoustic system for the first time. In treating noise reduction problems, the frequency range in which a noise reduction is desired is specified. This research examined the idea of reducing the integrated value of the sound pressure level in that frequency range of interest. The method developed here involves using mean eigenvalues to move the resonance points in the specified frequency range outside the target range. This makes it possible to reduce the sound pressure level integral.
9534135 Study of Vehicle Body Shell Structure Using Design Sensitivity Analysis Hiroshi Kamiya, Osamu Ninomiya, Tomikazu Sugita, Kazuhiro Kondou (Toyota Auto Body) This paper introduces a method improving vehicle body structure at the concept planning stage using Design Sensitivity Analysis. In this method, section sizes of beam elements are set as sensitivity valuables, improvement of the structure is formed by considering sensitivities of many structural responces at the same time, and the sensitivities are expressed with a diagram to understand easily.
9534144 Shift Synthesis to Realize Linear Homologous Deformation Shigeru Nakagiri, Nobuhiro Yoshikawa (University of Tokyo) A formulation is presented for homology design of structures based on the finite element sensitivity analysis in order to realize homologous deformation which enables us to hold a certain geometrical property before and after the deformation. The governing equation of the duly chosen design variables is derived in the form of linear simultaneous equations with rectangular coefficient matrix. The Moore-Penrose generalized inverse is employed to deal with the rectangular matrix. The validity of the present formulation is verified by numerical examples concerned with elastic planar lattice frames.
9534153 Weight Reduction Technology by Laser Irradiation for Body Panels Akihito Sato, Hiroki Nakajima, Shinichiro Nakamura, Yosiro Tomioka (Toyota Motor Corporation) In order to reduce the weight of automobile body panels, we developed the new technology by laser. Reinforcements are attached on strength parts to ensure the safety on crashing. We tried to take off the reinforcement from member front side, and examined the laser quench method. Utilizing the partial strength by structural hardening with laser quench, energy absorption of laser quench assy (this assy has no reinforcement) was almost same as standard assy with reinforcement. So, it became possible to combine the weight reduction and safety on crashing.
9534162 Development of 440MPa Grade Galvannealed Steel Sheet for Laser Irradiation Strengthening Kitsuru Kitamura, Koichi Makii, Tetsuo Soshiroda, Tsuyoshi Inoue (Kobe Steel, Ltd.) Yoshiro Tomioka, Shinichiro Nakamura, Hiroki Nakajima, Akihito Sato, Hideshi Aikou (Toyota Motor Corporation) The purpose of this study was to establish metallurgical concept for laser strengthening of steel and to develop 440MPa grade steel sheet with an improved laser strengthening sensitivity. It was found that an increase in tensile strength CATS) of steel, attained by laser irradiation, is dominated mainly by chemical composition of steel and also, the ATS corresponds well with K,-value defined as C% X Mn%. 440MPa grade
309
galvannealed steel sheet was developed based on K,-value for application of laser quench technology to automobile body parts. The ATS of developed steel is about 14OMPa, and its high level of properties was confirmed.
Development of Laser Carburizing Process using Hydro9534171 carbon Gas S. Kaizu, Y. Shimbo, M. Ono, M. Kabasawa (NKK Corporation), A. Sato, K. Totsuka, S. Nakamura, Y. Tomioka (Toyota Motor Corporation) In order to reduce the weight of automobiles and ensure the safety on crashing, laser quench method was investigated. However, carbon content of IF steel being very low, we could not utilize the conventional process for this steel. We have been developed new laser quench process for the purpose of strengthening IF steel. Using hydrocarbon gas as the reacting gas, it was found to become possible to strengthen laser irradiated region. As a result, we developed the laser carburizing system which consisted of the nozzle for injecting gas and the device for exhausting unresolved gas.
9534180 Development of TS-BH Hot-Rolled Sheet Steel Kazutoshi Kunishige, Nozomi Komatsubara, Shigeki Nomura, Syuji Nakai (Sumitomo Metal Industries Ltd.) Nitrogen added steel produced by a low temperature coiling practice has been developed. This type of steel shows a marked increase in tensile strength as well as in yield strength through bake-hardening effect(BH1. Increase in tensile strength in the present study is due to strain aging of nitrogen. With a fairly large amount of prestrain: 8% for example, tensile strength is increased by more than about 80Mpa after baking heat-treatment. This TS-BH hot-rolled sheet steel has a great potential to be used for difficult-to-form underbody parts of automobile which demand fatigue properties especially.
9534199 The Force Which Applied on The Belt Blocks at Operation Hidehiko Aihara, Mitsunao Takayama, Takahiko Murase (Aichi Machine Industry Co. Ltdl, Keizo Nonaka (Bando Chemical Industries, Ltd) The dry hybrid belt consists of lateral H-shaped blocks and a pair of tension members inserted from both side of the block. The dimension of tension member compared with the blocks affects on force transmission mode. We have measured the forces applied on the belt blocks at operation and have analyzed the relation between them. This is the report on this.
Development of 2WAY Clutch System for Dry Hybrid Belt 9534207 CVT Masaaki Saiko, Yoshio Okada (Aichi Machine Industry Co., Ltd.), Hiromi Nojiri (NTN Corporation) The continuously variable transmission (CVT) system, consisting of a set of variable speed pulleys and a belt, may cause a shortage of acceleration power at vehicle’s restart since the belt cannot be returned to the low-speed side if the tires are locked due to sudden braking. It may sometimes be impossible to start the vehicle on an uphill road. We have solved this problem by means of 2-way free running clutch system.
9534216 An Example of Modified Tooth Surface of Helical Gear Reducing Transmission Error Yuji Iwase, Kenji Miyasaka (Toyota Motor Corporation) Generally some tooth modifications of mass-produced gears are experimentally determined to reduce gear noise. In this conventional method it is difficult to optimize all the tooth modifications. In this paper, all the modifications was optimized to reduce calculated transmission error by using analysing system for helical gear. The modified tooth by this new method got lower transmission error than the modified tooth by conventional method. Gear noise of mass-produced gears which had modified tooth was measured, and it was also reduced as a result of optimization by the new method.
combination with numerical optimization software (DOC/DOT) was tried to use for optimization. Various design problems such as body, chassis, and engine parts design were solved to demonstrate the effectiveness and the robustness of the present approach for automotive applications.
9534126 Development of a Topology Optimization Analysis Method for Coupled Structural-Acoustic System and Application to Vehicle Interior Noise Reduction Wakae Kozukue, Ichiro Hagiwara (Nissan Motor Co., Ltdl A toplogy optimization technique based on the homogenization method was applied to a coupled structural-acoustic system for the first time. In treating noise reduction problems, the frequency range in which a noise reduction is desired is specified. This research examined the idea of reducing the integrated value of the sound pressure level in that frequency range of interest. The method developed here involves using mean eigenvalues to move the resonance points in the specified frequency range outside the target range. This makes it possible to reduce the sound pressure level integral.
9534135 Study of Vehicle Body Shell Structure Using Design Sensitivity Analysis Hiroshi Kamiya, Osamu Ninomiya, Tomikazu Sugita, Kazuhiro Kondou (Toyota Auto Body) This paper introduces a method improving vehicle body structure at the concept planning stage using Design Sensitivity Analysis. In this method, section sizes of beam elements are set as sensitivity valuables, improvement of the structure is formed by considering sensitivities of many structural responces at the same time, and the sensitivities are expressed with a diagram to understand easily.
9534144 Shift Synthesis to Realize Linear Homologous Deformation Shigeru Nakagiri, Nobuhiro Yoshikawa (University of Tokyo) A formulation is presented for homology design of structures based on the finite element sensitivity analysis in order to realize homologous deformation which enables us to hold a certain geometrical property before and after the deformation. The governing equation of the duly chosen design variables is derived in the form of linear simultaneous equations with rectangular coefficient matrix. The Moore-Penrose generalized inverse is employed to deal with the rectangular matrix. The validity of the present formulation is verified by numerical examples concerned with elastic planar lattice frames.
9534153 Weight Reduction Technology by Laser Irradiation for Body Panels Akihito Sato, Hiroki Nakajima, Shinichiro Nakamura, Yosiro Tomioka (Toyota Motor Corporation) In order to reduce the weight of automobile body panels, we developed the new technology by laser. Reinforcements are attached on strength parts to ensure the safety on crashing. We tried to take off the reinforcement from member front side, and examined the laser quench method. Utilizing the partial strength by structural hardening with laser quench, energy absorption of laser quench assy (this assy has no reinforcement) was almost same as standard assy with reinforcement. So, it became possible to combine the weight reduction and safety on crashing.
9534162 Development of 440MPa Grade Galvannealed Steel Sheet for Laser Irradiation Strengthening Kitsuru Kitamura, Koichi Makii, Tetsuo Soshiroda, Tsuyoshi Inoue (Kobe Steel, Ltd.) Yoshiro Tomioka, Shinichiro Nakamura, Hiroki Nakajima, Akihito Sato, Hideshi Aikou (Toyota Motor Corporation) The purpose of this study was to establish metallurgical concept for laser strengthening of steel and to develop 440MPa grade steel sheet with an improved laser strengthening sensitivity. It was found that an increase in tensile strength CATS) of steel, attained by laser irradiation, is dominated mainly by chemical composition of steel and also, the ATS corresponds well with K,-value defined as C% X Mn%. 440MPa grade
309
galvannealed steel sheet was developed based on K,-value for application of laser quench technology to automobile body parts. The ATS of developed steel is about 14OMPa, and its high level of properties was confirmed.
Development of Laser Carburizing Process using Hydro9534171 carbon Gas S. Kaizu, Y. Shimbo, M. Ono, M. Kabasawa (NKK Corporation), A. Sato, K. Totsuka, S. Nakamura, Y. Tomioka (Toyota Motor Corporation) In order to reduce the weight of automobiles and ensure the safety on crashing, laser quench method was investigated. However, carbon content of IF steel being very low, we could not utilize the conventional process for this steel. We have been developed new laser quench process for the purpose of strengthening IF steel. Using hydrocarbon gas as the reacting gas, it was found to become possible to strengthen laser irradiated region. As a result, we developed the laser carburizing system which consisted of the nozzle for injecting gas and the device for exhausting unresolved gas.
9534180 Development of TS-BH Hot-Rolled Sheet Steel Kazutoshi Kunishige, Nozomi Komatsubara, Shigeki Nomura, Syuji Nakai (Sumitomo Metal Industries Ltd.) Nitrogen added steel produced by a low temperature coiling practice has been developed. This type of steel shows a marked increase in tensile strength as well as in yield strength through bake-hardening effect(BH1. Increase in tensile strength in the present study is due to strain aging of nitrogen. With a fairly large amount of prestrain: 8% for example, tensile strength is increased by more than about 80Mpa after baking heat-treatment. This TS-BH hot-rolled sheet steel has a great potential to be used for difficult-to-form underbody parts of automobile which demand fatigue properties especially.
9534199 The Force Which Applied on The Belt Blocks at Operation Hidehiko Aihara, Mitsunao Takayama, Takahiko Murase (Aichi Machine Industry Co. Ltdl, Keizo Nonaka (Bando Chemical Industries, Ltd) The dry hybrid belt consists of lateral H-shaped blocks and a pair of tension members inserted from both side of the block. The dimension of tension member compared with the blocks affects on force transmission mode. We have measured the forces applied on the belt blocks at operation and have analyzed the relation between them. This is the report on this.
Development of 2WAY Clutch System for Dry Hybrid Belt 9534207 CVT Masaaki Saiko, Yoshio Okada (Aichi Machine Industry Co., Ltd.), Hiromi Nojiri (NTN Corporation) The continuously variable transmission (CVT) system, consisting of a set of variable speed pulleys and a belt, may cause a shortage of acceleration power at vehicle’s restart since the belt cannot be returned to the low-speed side if the tires are locked due to sudden braking. It may sometimes be impossible to start the vehicle on an uphill road. We have solved this problem by means of 2-way free running clutch system.
9534216 An Example of Modified Tooth Surface of Helical Gear Reducing Transmission Error Yuji Iwase, Kenji Miyasaka (Toyota Motor Corporation) Generally some tooth modifications of mass-produced gears are experimentally determined to reduce gear noise. In this conventional method it is difficult to optimize all the tooth modifications. In this paper, all the modifications was optimized to reduce calculated transmission error by using analysing system for helical gear. The modified tooth by this new method got lower transmission error than the modified tooth by conventional method. Gear noise of mass-produced gears which had modified tooth was measured, and it was also reduced as a result of optimization by the new method.