By Richard D. Atkins
This publication provides the elemental ideas required for the trying out and improvement of inner combustion engine powertrain structures, supplying the hot car engineer with the fundamental instruments required to successfully perform significant checks.
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Extra info for An Introduction to Engine Testing and Development
1). The split sump has several features in addition to the two water storage areas: A mains water top-up system using a float valve allows fresh mains water to top up the split-sump cold well as is required. In-Cell Services A dividing wall between the hot and cold wells is slightly lower than the normal water level to allow a bleed across the two wells. The dividing wall also has a small opening at the base to allow draining. A bleed-to-drain system is installed to allow a nominal amount of cooling water to leak away to the drain, usually about 1% of system capacity per day.
Frequently, a customer requests that his or her engine be run on a particular coolant and antifreeze mixture for certain tests. This mixture is set up for the coolant system of the engine, and the cell raw water services are used to maintain running temperatures as required by the test procedures. Note that all antifreeze solutions are not the same. Therefore, care should be used to ensure that technicians select the correct antifreeze, per the instructions of the engineer and client. This is particularly important when ultra-low emission levels are being measured, for the heat transfer rate through the mixture can affect the combustion process.
Piezoresistive sensors are used in lowpressure applications up to 300 psi, whereas thin-film sensors are used above 300 psi. Types of Pressure Transducers General-purpose transducers provide excellent performance, reliability, and value for a wide variety of electronic pressure measurement applications. 5% h l l span. These units are available in pressure ranges 0-1 5 psig up to 0-5000 psig. General-purpose transducers are available with a 4-20 mA or 0-10 V DC output. Industrial-grade transducers are precision engineered to fit most industrial pressure measurement applications.