The Development of Second Generation Ceramic Turbocharger Rotor - Further Improvements in Reliability

Matoba, Kazuo; Katayama, Kaoru; Kawamura, Mitsuyoshi; Mizuno, Takeyuki

doi:10.4271/880702

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…Therefore, the final step-up pressure results in an isostatic pressure on the inner, porous bulk material that closes the pores and speeds up the densification [230,232,233]. It is very important to stress that silicon nitride prepared either by gas pressure sintering or normal sintering under well-controlled conditions was found to be the must suitable material for manufacturing a ceramic turbocharger rotor [237,238].…”

Section: Gas Pressure Sintering (Gps)mentioning

confidence: 99%

Dense and near-net-shape fabrication of Si3N4 ceramics

Bocanegra‐Bernal

Matović

2009

Materials Science and Engineering: A

114

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Section: Gas Pressure Sintering (Gps)mentioning

confidence: 99%

Dense and near-net-shape fabrication of Si3N4 ceramics

Bocanegra‐Bernal

Matović

2009

Materials Science and Engineering: A

114

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“…Silicon nitride was chosen as the rotor material because of its strength, fracture toughness, thermal shock resistance and thermal expansion coefficient [1,2]. Generally, covalent silicon nitride is not sinterable, but is rendered so through the use of common sintering aids such as Y203 and Al203.…”

Section: Ceramic Materialsmentioning

confidence: 99%

“…The CN-1 type[l] was produced between 1985 and 1987 and was used with 2.0-liter in-line 6-cylinder DOHC engines. The CNR-1 type [2,3] has been in produc- tion since 1987. This ceramic rotor is a redesigned, low-stress version of the CN-1 and is used with 2.0 liter in-line 6-cylinder or V-6 DOHC engines and 3.0liter V-6 DOHC engines [4].…”

Section: Introductionmentioning

confidence: 99%

“…The T-25 type has been in production since 1989 and was developed for use with 2.6-liter twin-turbocharged in-line 6-cylinder DOHC engines [6]. The design details of this ceramic rotor are explained in references [1] and [2], and the engine performance obtained is described in references [1], [3], [4] and [6]. A turbocharger rotor must be capable of withstanding long periods of use in automobile exhaust gas, which can reach temperatures as high as approximately 900°C.…”

Section: Introductionmentioning

confidence: 99%

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Application of Ceramics to Turbocharger Rotors for Passenger Cars

Katano

Ando

Itoh

et al. 1991

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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Nissan has been developing and marketing ceramic turbocharger rotors for over five years. This paper outlines the major theories and techniques used in ceramic fabrication, joining of ceramic and metal components and machining of ceramics. It also presents a dynamic stress analysis using DYNA3D and describes techniques used in performing impact damage experiments, reliability evaluation and lifetime prediction NOMENCLATURE A pre-multiplier in crack velocity a crack length B constant D constant E Young's modulus F failure probability H hardness Kc fracture toughness KiCcritical stress intensity factor L load m Weibull modulus N crack velocity exponent P survival probability r radius S material strength t time V velocity ve effective volume Y shape factor p density 6 stress

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“…Type I : This type was adopted for the first Projectile generation of CTR using shrink fitting at two places on large and small diameter shafts [10,11]. • It was confirmed that the necessary specification of the turbocharger can be met by using maraging steel [12] shaft and optimizing the interference and joint length at each of the two places.…”

Section: Si Nmentioning

confidence: 99%

Development of Ceramic Turbocharger Rotors for High Temperature Use

Kawase

Matsuhisa

Kato

et al. 1991

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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A ceramic turbocharger rotor (CTR) for high temperature use has been developed. The features of this rotor are the use of silicon nitride which maintains high mechanical strength up to 1,200 °C and a new joining technique between the ceramic rotor and its metal shaft. The CTR is expected to cope with stoichiometrical mixture burning engines which produce a higher exhaust gas temperature for fuel economy, and the impact resistance of the rotor against foreign object damage (FOD) has been markedly increased, over that of earlier rotors, resulting in higher reliability. This paper describes the development of ceramic turbocharger rotors for high temperature use focusing on the mechanical strength of silicon nitride and the joining of the ceramic rotor and its metal shaft.

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The Development of Second Generation Ceramic Turbocharger Rotor - Further Improvements in Reliability

Cited by 10 publications

References 2 publications

Dense and near-net-shape fabrication of Si3N4 ceramics

Dense and near-net-shape fabrication of Si3N4 ceramics

Application of Ceramics to Turbocharger Rotors for Passenger Cars

Development of Ceramic Turbocharger Rotors for High Temperature Use

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