USED ENGINES
New and Used Engines are subjected to stringent testing by vehicle manufacturers and engine builders to gauge the efficiency and quality of certain engines and engine parts. An engine test stand is a facility used to develop, characterize and test engines for this purpose. The facility, often offered as a product to automotive manufacturers, allows engine operation in different operating regimes and offers the measurement of several physical variables associated with the engine operation through development phases and scientific engineering.
A sophisticated engine test stand, which is also a dynamometer, houses several sensors and data acquisition features and actuators to control the engine state. The sensors would measure several physical variables of a new or used engine which typically include: The crankshaft torque and angular velocity. The measuring of intake air and fuel consumption rates in new and used engines, often detected using volumetric and/or gravimetric measurement methods. The air fuel ratio for the intake mixture and the exhaust gas, which detects amounts of carbon monoxide and different configurations of nitrogen oxides and sulfur dioxides of the emmissions. Temperatures and gas pressures at several locations on the engine such as engine oil spark plug, exhaust gass, and intake manifold temperatures, pressures and atmospheric conditions of the engine are critical to determine how well a particular engine part holds up at different stages of its life measured in distance or the time the engine has endured.
Information gathered through the sensors is often processed and logged through data. Actuators allow for attaining a desired engine state. For gasoline engines, the actuators may include an intake throttle actuator, a loading device for the engine such as an induction engine. The engine test stands are often custom-packaged considering requirements of the OEM customer.
The vehicle manufacturers have through extensive testing from the new factory engine to hundreds of engines which have completed hundreds and thousands and even hundreds of thousands of hours of testing. These test stands give the engineers a profile to ‘go on’ giving indications as to how well an engine part should be made to last in order for the warranty period of a used engine to be fulfilled. Even oil changes have been scientifically predicted. Instead of a new engines first oil change to be administered at 10,000 km’s, the manufacturer stipulates the first change at 15,000 km’s.
If an engine part is too well made there would be no market for aftermarket auto spares as the engine would outlast the vehicle. The entire motor industry would be a failure including automotive scrapyards that provide a re-cycling of auto scrap and spare parts essential to not only the industry but also to the environment and future of our fragile planet earth. Vehicle manufacturers have to make money and would not succeed in the market place without doing these critical tests on new and used engines at different intervals and under various operating conditions.
For more information CLICK HERE “Used Engines / Engine Parts / Scrapyards” or Call Centre : 0861 7777 22
