Development of a Valve Train Wear Test Procedure for Gasoline Engine Oil

1994 ◽  
Author(s):  
Kenji Hanada ◽  
Yasuhiro Murakami ◽  
Yusuke Shoji ◽  
Hisamoto Aihara ◽  
Atsushi Hirose
Keyword(s):  
Gasoline Engine ◽  
Test Procedure ◽  
Wear Test ◽  
Valve Train ◽  
Engine Oil

Performance Study of Zinc Oxide Nanoparticles for Lubricant Oil

2015 ◽  
Vol 1118 ◽  
pp. 195-204 ◽  
Author(s):  
Wei Guo Xue ◽  
Zheng Hua Zhao ◽  
Peng Wang ◽  
Zhi Liang Jin ◽  
Xiao Hong Xu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Gasoline Engine ◽  
Wear Test ◽  
Engine Oil ◽  
Oxide Nanoparticles ◽  
Performance Study ◽  
Wear Properties ◽  
Scanning Calorimetry ◽  
Oil Additives

One oil soluble zinc oxide nanoparticles were prepared by surface-modification method. Its tribological performance was evaluated by four-ball test, SRV Friction-Wear Test and Mini-Traction machine, its oxidation resistance estimated by Rotating Pressure Vessel Oxidation Test and Pressurized Differential Scanning Calorimetry, all these study were contrast with ZDDP in base oils and API SM Gasoline engine oil. As a result, nanozinc oxide has good anti-oxidative capability, excellent anti-wear properties, In API SM Gasoline engine oil, the comprehensive Performance of nanoZnO additive substitution ZDDP is similar to ZDDP, in particular friction and antioxidative properties, nanoZnO in more outstanding than ZDDP. These results showed that zinc oxide nanoparticles were a kind of good performance lubricanting oil additives.

scholarly journals Study on the Prospects of Use the Group D Engine Oil in Locomotive Diesel Engines

2018 ◽  
Vol 7 (4.3) ◽  
pp. 47
Author(s):  
Andrii Кravets ◽  
Andrii Yеvtushenko ◽  
Andrii Pogrebnyak ◽  
Yevhenii Romanovych ◽  
Heorhii Afanasov
Keyword(s):  
Diesel Engines ◽  
Wear Test ◽  
Engine Oil ◽  
Test Machine ◽  
Group V ◽  
Engine Oils ◽  
Oil Fuel ◽  
Continuous Use ◽  
Group D ◽  
Locomotive Diesel

It was suggested to use group D engine oil with advanced properties instead of group V and G engine oils, which are used in locomotive diesel engines today, to improve the performance of the Ukrainian locomotive fleet of railways.A series of comparative laboratory studies of these oil groups was conducted to substantiate this suggestion which proved better lubrication and tribological performance of group D engine oil and allowed its performance tests.Tests conducted on diesel 5D49 for mileage of more then 100,000 km have demonstrated the advantages of group D oils, such as more stable viscosity, neutralizing ,washing and other properties. Studies on the four-ball wear test machine proved better anti-wear, anti-scoring and anti-friction properties of group D engine oil, which appear even after the continuous use of oils in locomotive diesels. Decrease in burning loss of engine oil was recorded, resulting in the decrease of oil fuel consumption for group D by 30-60% vs. the group G oil.According to the results of performance tests, group D engine oil has been recommended for the use in 5D49 locomotive diesels and some advice on its future implementation have been provided.  

Performance Analysis and Improvement Approach of HEV Extended Expansion Gasoline Engine

2011 ◽  
Vol 317-319 ◽  
pp. 1999-2006
Author(s):  
Yu Wan ◽  
Ai Min Du ◽  
Da Shao ◽  
Guo Qiang Li
Keyword(s):  
Mathematical Model ◽  
Performance Analysis ◽  
Fuel Consumption ◽  
Economic Performance ◽  
Gasoline Engine ◽  
Engine Performance ◽  
Valve Train ◽  
Gasoline Engines ◽  
Simulation Results ◽  
Negative Impacts

According to the boost mathematical model verified by experiments, the valve train of traditional gasoline engine is optimized and improved to achieve extended expansion cycle. The simulation results of extended expansion gasoline engine shows that the extended expansion gasoline engine has a better economic performance, compared to traditional gasoline engines. The average brake special fuel consumption (BSFC) can reduce 22.78 g / kW•h by LIVC, but the negative impacts of extended expansion gasoline engine restrict the potential of extended expansion gasoline engine. This paper analyzes the extended expansion gasoline engine performance under the influence of LIVC, discusses the way to further improve extended expansion gasoline engine performance.

Gasoline engine valve train design evolution and the antiwear requirements of motor oils

1998 ◽  
Vol 212 (4) ◽  
pp. 243-257 ◽  
Author(s):  
J. C. Bell
Keyword(s):  
Gasoline Engine ◽  
Control Valve ◽  
Practical Experience ◽  
Valve Train ◽  
Gasoline Engines ◽  
Design Evolution ◽  
Strong Trend ◽  
Wear And Friction ◽  
Direct Acting ◽  
Motor Oils

The ability of motor oils to control valve train wear adequately is ensured by the evaluation of new formulations in a variety of standard industry tests. The most critical of these tests have single-overhead-cam valve train systems with pivoted (rocker- or finger-type) followers. Although many vehicles in service have these types of valve train, there is a strong trend towards the use of roller-follower and direct-acting tappet (DAT) systems in recently introduced passenger car engine designs. Roller designs virtually eliminate sliding between the cam and follower and in gasoline engines reduce wear and friction to low levels. Practical experience indicates that DAT systems also give lower wear and friction than pivoted systems do. The parameters affecting wear in the pivoted-follower valve trains of the Sequence VE and Peugeot TU-3 tests are analysed in comparison with equivalent DAT systems. The friction and wear benefits observed with DAT systems are shown to be inherent in the geometry and kinematics of this type of valve train. The consequences of this finding are discussed in relation to the requirements for antiwear protection provided by future motor oils.

A Boundary Lubrication Friction Model Sensitive to Detailed Engine Oil Formulation in an Automotive Cam/Follower Interface

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Rupesh Roshan ◽  
Martin Priest ◽  
Anne Neville ◽  
Ardian Morina ◽  
Xin Xia ◽  
...  
Keyword(s):  
Boundary Lubrication ◽  
Fuel Efficiency ◽  
Lubricant Additive ◽  
Friction Model ◽  
Operating Conditions ◽  
Valve Train ◽  
Engine Oil ◽  
Contact Friction ◽  
Boundary Lubrication Friction ◽  
Base Oil

Theoretical studies have shown that in severe operating conditions, valve train friction losses are significant and have an adverse effect on fuel efficiency. However, recent studies have shown that existing valve train friction models do not reliably predict friction in boundary and mixed lubrication conditions and are not sensitive to lubricant chemistry. In these conditions, the friction losses depend on the tribological performance of tribofilms formed as a result of surface–lubricant additive interactions. In this study, key tribological parameters were extracted from a direct acting tappet type Ford Zetec SE (Sigma) valve train, and controlled experiments were performed in a block-on-ring tribometer under conditions representative of boundary lubrication in a cam and follower contact. Friction was recorded for the tribofilms formed by molybdenum dithiocarbamate (MoDTC), zinc dialkyldithiophosphate (ZDDP), detergent (calcium sulfonate), and dispersant (polyisobutylene succinimide) additives in an ester-containing synthetic polyalphaolefin (PAO) base oil on AISI E52100 steel components. A multiple linear regression technique was used to obtain a friction model in boundary lubrication from the friction data taken from the block-on-ring tribometer tests. The model was developed empirically as a function of the ZDDP, MoDTC, detergent, and dispersant concentration in the oil and the temperature and sliding speed. The resulting friction model is sensitive to lubricant chemistry in boundary lubrication. The tribofilm friction model showed sensitivity to the ZDDP–MoDTC, MoDTC–dispersant, MoDTC–speed, ZDDP–temperature, detergent–temperature, and detergent–speed interactions. Friction decreases with an increase in the temperature for all ZDDP/MoDTC ratios, and oils containing detergent and dispersant showed high friction due to antagonistic interactions between MoDTC–detergent and MoDTC–dispersant additive combinations.

Development of ILSAC GF-5 0W-20 Fuel Economy Gasoline Engine Oil

2012 ◽  
Author(s):  
Kosuke Fujimoto ◽  
Minoru Yamashita ◽  
Toyoharu Kaneko ◽  
Satoshi Hirano ◽  
Yusuke Ito ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Gasoline Engine ◽  
Engine Oil
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