Skip to main content

Lubricating System

Lubricating system in an automobile is the system by which the various rotating and sliding engine parts are lubricated to reduce friction. An oil film is formed to prevent metal parts from coming into direct contact with one another. The lubrication devices include oil pumping, filtration, cooling, circulation and oil pressure regulation.

When the engine is not running, the engine oil stays in the oil pan at the bottom of the engine. When the engine is started, oil in the pan is sucked up by the oil pump (through strainer) linked directly to the crankshaft, and its pressure is regulated by a relief valve. The oil is then filtered by the oil filter, and cooled by the oil cooler. The filtered and cooled oil is then fed separately to the cylinder head and oil galleries.

The oil pumped to the oil gallery lubricates the crankshaft journal, and is then sent through the oil paths in the crankshaft to the crank pin lubricating, the connecting rod bearings. It is ejected out from the connecting rod in form of oil jets to lubricate the cylinders and piston pins.

The flow of oil pumped to the cylinder head is regulated by oil control orifices in the cylinder block before being fed to the cam holders and rocker arm pivots. The oil fed to the holders lubricate the camshaft journals and some of the oil is ejected out in the form of jet to lubricate the cams. The oil fed to the rocker arm pivot lubricates the pivot. After all the components have been lubricated, the oil returns to the oil pan.

Comments

Popular posts from this blog

Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find mo

Best CV Format for Mechanical Engineers

Fifty percent engineers fail to grab a dream job because of basic faults in their CVs/ Resume. This article tells you about best CV format for mechanical engineers and how you are supposed to design your CV when applying for jobs. You CV is your first impression on future employer. He/ she does not know you. Your CV is the only representation of your personality. He/ she may select or reject you after first glance on your resume.  I have experienced shortlisting and interviewing candidates for different jobs. I was astonished to learn that most of the candidates simply copy paste each others CVs without any changes at all. These types of CVs are rejected immediately. I am not trying to tell you that you should avoid copying, rather i ma telling you to refrain from giving your CV to your friends. An ideal CV consists of following portions: Name/ Address of the applicant Objective Education Record Employment History Professional Skills Awards & Achievements Co

Engineering Mechanics - Introduction

The Engineering Mechanics is that branch of Engineering-science which deals with the principles of mechanics along with their applications to engineering problems. It is sub-divided into the following two main groups: (a) Statics, and (b) Dynamics The Statics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies at rest. The Dynamics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies in motion. It is further sub-divided into the following two branches: (i) Kinetics, and (ii) Kinematics The Kinetics is that branch of Dynamics, which deals with the bodies in motion due to the application of forces. The Kinematics is that branch of Dynamics which deals with the bodies in motion without taking into account the forces which are responsible for the motion.