Theoretical analysis of bearing considering elastic deformation – effects of the housing stiffness and bearing length on bearing performance

In recent high power, compact and light weight automotive engines, the bearing load has been increasing and housing stiffness has been decreasing. As a result, the bearing performance is greatly influenced by elastic deformations of both the housing and the bearing. The effects of changing both the housing stiffness and the bearing length on bearing performance were studied by using the elastohydrodynamic lubrication theory on connecting rod bearings for diesel engines.     

Improvement of exhaust gas pressure’s utilization for compressing the intake air in diesel engine’s cylinders

In order to improve the economical and environmental performances of the Diesel engines, the present paper aims to bring to the forefront solutions to increase the efficiency of the supercharging process carried out by the aggregates with Comprex type pressure waves. One solution to this is to drive the Comprex, not by the supercharged engine as it currently happens, but by a DC motor. The speed of the electric motor is modified, by means of an electronic management system, depending on the speed and load of the Diesel engine. The paper presents the experimental results obtained during the investigation of a supercharged Diesel engine by the Comprex driven type according to the proposed solution.     

Chinese auto engine joint ventured manufacturers

┏━━━━━━━━━━━━┳━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓┃ ┃ Date of ┃ ┃ Proportion ┃Total/Registered ┃ ┃┃ Name of ioint venture ┃ ┃ Partners ┃[each part,/) ┃ ca籼t^I ┃ Pmductinn prugram ┃┃ ┃ production ┃ ┃ ┃ ┃ ┃┃ ┃ ┃ ┃ ％ ┃ USD rail. ┃ ┃┣━━━━━━━━━━━━╋━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━…     

Development of instrument for measurement of fuel–air ratio in vicinity of spark plug: application to DI gasoline engine

An instrument to measure time-resolved fuel–air ratio in the vicinity of a spark plug was developed. Properties of absorption and scattering at the wavelengths of visible and infrared rays were utilized to determine the fuel–air ratio in the mixture including liquid and vaporized fuel. The measurement error of the instrument was within 10% as a result of comparison between the overall and the measured fuel–air ratio at the vicinity of the spark plug under the inlet port injection, which forms a relatively homogeneous mixture. The instrument was applied to a direct injection gasoline engine and the mixture formation process was clarified.     

Characteristics of Methods on the Circulation of Used Vehicles

On Aug 29 2005, the Ministry of Commerce, together with other relevant government departments, issued the Methods and the new went into effect on Oct. The used vehicle market is regarded a potential section which can incentive consumption and increase tax income as well. But the market can hardly meet the requirement of the society. The critical reason behind this is the lack of related rules. The new policy is designed to meet the demand of post-WTO conditions. The 5 chapter, 37 article M…     

Dances on Top of the Pyramid

ThespeedandglamourofF1carracingandtheChallengeBibendumforenvironmentalprotection and the future, which in their own ways presented the top of the pyramid ofvehicle technology, made Shanghai attract the attention of the world in early autumn.However, after the excitement and amazement, people have to wonder about theobsession with automobiles in China. The F1 car racing in Shanghai was a show of speed and greed. The roaring cars wereillustrating the ultimate in modern technology. However, fo…     

Lubricating performance of carbon nanotubes in internal combustion engines – engine test results for CNT enriched oil

The main purpose of this research is to reduce friction losses by adding carbon nanotubes to engine oil. Extremely favorable tribological properties of carbon nanotubes have been extensively studied on the microscopic scale and using tribometers, have not yet been verified in the engine. Enriching oil with nanotubes can lead to significant, exceeding 7 %, reduction in the motoring torque of the engine at low crankshaft rotational speed. The phenomena associated with the dispersion of carbon nanotubes in the engine are stated and discussed. It has been shown that the oil shear during normal operation of the engine can effectively improve the dispersion of nanotubes. At the same time the oil filtration system removes agglomerates of nanotubes very quickly.     

Comments on Price Reduction of Chinese Cars

1. Background Because of the facts that the relation between supply and demand has changed greatly in Chinese-made car market, the pattern of competition has come into being mostly, the competition among carmakers has become fiercer, personal purchasing has turned into the main trend rather than institutional purchasing, on May 10, 2001, the State Development Planning Commission of China decided to relax control over the price of Chinese-made cars. The policy will contribute to carmakers in participating in the     

Regulations on Recall of Defective Automobile Products

(ContinuedtoPage13,IssueJun.2004)Ifmanufacturerscanprovethatrecallisunnecessary,theyshallsubmitadetailedreporttothecompetentkeygovernmentdepartmentandthedepartmentshallcontinuetotracetheissueArticle24Ifmanufacturerscannotprovethenon-existenceofanydefects,ortheevidenceisconsiderednotenoughtosupportthem,andiftheydonotvoluntarilyconducttherecall,thecompetentgovernmentdepartmentshallentrusttheexpertscommitteetomakeasurveyorappraisal,andmanufacturerscanassigntheirrepresentativestoexplainthesituati…     

Culture on the Transliteration of Brand Names

As the kernel of advertisements,a successful brand name can swiftly draw the attention of consumers,evoke imagination and desires so that it     

Micromechanical Analysis on Viscoelasticity of Asphalt Mixtures

Mori-Tanaka　equivalent　inclusion　micromechanics　theory　was　employed　to　investigate　the　viscoelasticity　of　asphalt　mixture　Asphalt　mixture　was　regarded　as　composites　which　treated　coarse　aggregate　as　a　rigid　inclusion　and　the　mixture　of　fine　aggregate,filler　and　binder　as　viscoelastic　matrix　The　constitutive　relations　of　coarse　aggregate　inclusion　and　fine　aggregate-filler-binder　matrix　were　converted　into　elastic　problems　by　Laplace　transformation　Then　the　Mori-Tanaka　equivalent　inclusion　and　average　theory　were　used　to　deduce　the 　viscoelastic　performance　of　asphalt　mixture　based　on　that　of　asphalt　mortar　in 　Laplace　space　The　result　shows　that　(1)　coarse　aggregate　inclusion　can　enhance the　viscoelastic　performance　of　fine　aggregate?filler?binder　matrix　and　viscoelastic　constitutive　relation　of　asphalt　mixtures　can　be　expressed　as　the　product　of　an　enhancement　coefficient　of　coarse　aggregate　and　the　viscoelastic　constitutive　relation　of　fine　aggregate?filler?binder　matrix;　(2)　the　viscoelasticity　of　the　complex　asphalt　mixture　can　be　predicted　from　the　viscoelasticity　of　the　homogeneous　fine　aggregate?filler?binder　matrix　by　using　the　nhancement　coefficient;　(3)　the　enhancement　coefficient　is　higher　than　10　and　it　rises　with　increasing　of　coarse　aggregates'　volumetric　fraction　or　Poisson's　ratio　of　fine　aggregate-filler-binder　matrix　but　the　effect　of　the　former　is　more　important　than　that　of　the　latter     

Regulations on Recall of Defective Automobile Products

Decree No 60. jointly issued by the State Bureau of Quality Supervision,Inspection and Quarantine, the National Development and Reform Commission,the Ministry of Commerce, and the State Administration of Customs RRDAP on Recall of Defect Automobile Products (hereafter calledRRDAP) hasbeen approved by the four government departments and now is made public. Itwill come into force on Oct 1, 2004. The RRDAP will first be applied on M1category vehicles (passenger vehicles with no m…