ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Automotive Lubrication System

Updated on December 2, 2016

The engine lubrication system serves two purposes: it reduces metal-to-metal friction and wear between rotating and sliding parts, and it carries excess heat away from the engine. Among the important surfaces requiring lubrication are the crankshaft journal bearings, connecting-rod bearings, wristpins, cylinder walls, piston skirts and rings, camshaft bearings, valve mechanism, and timing gears.

An oil supply of 4 to 5 quarts (or liters), depending on engine size and design, is maintained in the crankcase. A screened, floating oil intake is provided at the suction side of a camshaft-driven lubricating-oil pump. Located in the deepest part of the crankcase, the intake rises and falls with the oil level. Oil is picked up by the circulating pump and delivered at a pressure of approximately 40 pounds per square inch (3 kg/cm) to a main gallery that runs the length of the cylinder block. Branch passages then conduct the oil to the valve mechanism, timing gears, camshaft bearings, and crankshaft main bearings. From the main-bearing journals it flows through the drilled crankshaft to the connecting-rod bearings, passing up through drilled holes in the I-beam connecting rods to the wrist-pins and piston bosses to which they are attached. Cylinder walls and piston skirts are lubricated by oil thrown from rotating parts; excess oil is scraped from the cylinder walls by the oil-control rings and drained back down into the crankcase.

A gauge or signal light on the instrument panel indicates the state of the oil pressure. The oil level in the crankcase is measured either by a graduated "stick" type of gauge or by a direct-reading gauge on the instrument panel.

Prior to 1962, American cars were equipped with breather tubes that discharged unburned crankcase gases directly into the atmosphere. Since 1962, however, they have been equipped at the factory with internal venting devices by means of which these unburned gases are led back to the engine combustion chambers and burned. This ventilation system was devised to reduce air pollution caused by crankcase vapors.

Comments

    0 of 8192 characters used
    Post Comment

    • profile image

      jason sheridan 

      7 years ago

      I need info on the history of lubrcation system in cars and am finding it hard to get it cam some one help me

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)