Work-related roadway crashes are the leading cause of death from traumatic injuries in the U.S.
In these instances, the employer providing the vehicle generally plays a major role in setting safety, maintenance, and training policy.5 As in non-occupational driving, young drivers are especially at risk.
On its bottom, the sump contains an oil intake covered by a mesh filter which is connected to an oil pump then to an oil filter outside the crankcase, from there it is diverted to the crankshaft main bearings and valve train.
A single main bearing may provide oil for 0, 1 or 2 big end bearings.
A similar system may be used to lubricate the piston, its gudgeon pin and the small end of its connecting rod; in this system, the connecting rod big end has a groove around the crankshaft and a drilling connected to the groove which distributes oil from there to the bottom of the piston and from then to the cylinder. Other systems are also used to lubricate the cylinder and piston.
The connecting rod may have a nozzle to throw an oil jet to the cylinder and bottom of the piston.That nozzle is in movement relative to the cylinder it lubricates, but always pointed towards it or the corresponding piston. Typically a forced lubrication systems have a lubricant flow higher than what is required to lubricate satisfactorily, in order to assist with cooling. Specifically, the lubricant system helps to move heat from the hot engine parts to the cooling liquid (in water-cooled engines) or fins (in air-cooled engines) which then transfer it to the environment.
The lubricant must be designed to be chemically stable and maintain suitable viscosities within the temperature range it encounters in the engine.Å¹rÃ³dÅ‚o: https://en.wikipedia.org/wiki/Internal_combustion_engine
Too high speed, the desire to impress colleagues or colleagues and little experience in managing vehicle are the main causes of dangerous incidents on the road.It is not surprising that insurers often make the amount of insurance premiums was the age of the holder of the vehicle and the number of road events with his participation.