Innovative Toyota Standard Engine Equipped with 4-Valve

Kimbara, Yoshiro; Konishi, Masami; Kitagawa, Katsutoshi; Watanabe, Hiroyoshi; Tomita, Tsutomu

doi:10.4271/870352

Cited by 11 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the reasons outlined earlier, we recommend using Equation 1 to compute percent fuel economy. July 1993 (5). 277 0954-0075 $6.00 + $2.50 tant in that a highly fuel-efficient oil calls for an adequate combination of low viscosity at HSHT, low EHD film thickness, and excellent friction modification.…”

mentioning

confidence: 99%

Reliable model of lubricant‐related friction in internal combustion engines

Benchaita

Lockwood

1993

Lubrication Science

View full text Add to dashboard Cite

A linear model of lubricant-related engine friction was developed. Based on lubrication fundamentals, the technique is comprised of three simple bench tests that respectively operate under thick fluidfilm hydrodynamic lubrication, elastohydrodynamic lubrication, and boundary lubrication. With adequate configunztion and appropriate test conditions, these bench tests are seen to simulate major friction losses in a typical intern1 combustion engine. Lubricant characteristics obtained in the bench tests were combined using SAS linear regression and correlated to ASTM Five-Car and Sequence VI engine tests. The linear model gave an excellent prediction of engine data. It further showed that hydrodynamic friction losses dominate lubricant-related engine fiction, followed by boundary friction losses, and elastohydrodynamic or mixed friction losses. This simple, reliable, and inexpensive technique can be used as a research tool to study fiction characteristics of crankcase lubricants and to develop superior fuel-efficient engine oils. Major findings fron this study can be summarised as f i h w s : I . The linear &l predicts that 5 to 6% fuel economy improvement over the industry high reference oil HR-4 is achievable with today's motor oil technology. both 'thick' and 'thin' fluid-film lubrication account for 63% of total friction losses caused by the engine oil while boundary friction losses amount to 37%. 3. Friction losses in the elastohydrodynamic mHD) engine are significant, up to 22% of total friction losses. This, combined with the fact that EHD film thickness is the most significant parameter in the linear model, suggests that pressure effects (ie, high-temperature I high-shear I high-pressure viscosity, pressure-viscosity coefficients) are important. Hydrodynamic friction losses in 4.Increasing fuel economy improvement is in general in the order: SAE lOW-40 < SAE low40 < SAE 5W-30, providing that base stock and additive systems are unchanged.

show abstract

mentioning

confidence: 99%

Reliable model of lubricant‐related friction in internal combustion engines

Benchaita

Lockwood

1993

Lubrication Science

View full text Add to dashboard Cite

show abstract

Schmierung und Reibung von Ventiltrieben

Affenzeller¹,

Gläser

1996

Lagerung Und Schmierung Von Verbrennungsmotoren

View full text Add to dashboard Cite

Automotive Electronics In Passenger Cars

Numazawa

International Congress on Transportation Electronics,

View full text Add to dashboard Cite

As in other industries, the application and impact of electronics have tremendously improved the function of automobiles. The application of electronic technology has provided higher performance, added convenience, more comfort, and greater safety for automobiles, in the areas of basic automotive functions, such as traveling, turning, and stopping, and in the other areas of display, convenience, entertainment and communication with society, etc.

show abstract

Innovative Toyota Standard Engine Equipped with 4-Valve

Cited by 11 publications

References 1 publication

Reliable model of lubricant‐related friction in internal combustion engines

Reliable model of lubricant‐related friction in internal combustion engines

Schmierung und Reibung von Ventiltrieben

Automotive Electronics In Passenger Cars

Contact Info

Product

Resources

About