Injection metering systems

An injection metering system can be operated based on one of two control strategies, namely ... 

Antuniassi, U.R., Miller, P.C.H. and Paice, M.E.R. (1997) Dynamic and steady-state dose responses of some chemical injection metering systems. Proceedings, Brighton Crop Protection Conference - Weeds, pp. 587-692. 

Frost, A.R. (1990) A pesticide injection metering system for use on agricultural spraying machines. Journal of Agricultural Engineering Research, 46, 55-70... 

Craig, I.P., Matthews, G.A. and Thornhill, E.W. (1993) Fluid injection metering system for closed pesticide delivery in manually operated sprayers. Crop Protection 12, 549-553. 

The performance of the catalytic converter is affected by the conditions of air/fuel control provided by the fuel metering system. A slowly responding fuel metering system can dramatically decrease the conversion efficiency of the converter compared to a fast response multipoint fuel injection system. 

Fuel injection, diesel, 70 60-61 Fuel injection systems, 70 51 Fuel injector detergents, 72 408 409 Fuel metering system dynamic (lag time), 70 50... 

Basically, samples of the reaction medium are injected at regular time intervals in a GC apparatus signals from two (or more) comonomers are compared and a differential signal is used to monitor a metering system for introducing the monomer which is consumed more rapidly. 

The initial development of either volume-based or injection metering dose-control systems aimed at achieving a uniform controlled dose across a treatment area that was independent of machine variables, particularly forward speed. However, there is substantial evidence to show that the target requirements for many plant-protection products are not uniform across a field, and that there is the... 

The electronic fuel injection (EFI) system meters the hydrogen to each cylinder. This system uses individual electronic fuel injectors (solenoid valves) for each cylinder and are plumbed to a common fuel rail located down the center of the intake manifold. Whereas the CVI system uses constant injection timing and variable fuel rail pressure, the EFI system uses variable injection timing and constant fuel rail pressure. 

Apparatus consisting of a QCM system, which is available commercially (ANT Tech, www.anttech.com.tw) and includes a frequency meter, an oscillator, a port connected to a computer, a software to collect and display on a computer screen, a flow-injected analysis system. 

A typical process (see Fig. 8-27) uses a high-pressure metering system that combines the streams in a mixing head by impingement. Static mixers in the runner system to the mold produce additional mixing. After the materials are injected into the mold, the blowing agent expands the shot to fill the mold. 

Urethanes are processed as mbber-like elastomers, cast systems, or thermoplastic elastomers. The elastomer form is mixed and processed on conventional mbber mills and internal mixers, and can be compression, transfer, or injection molded. The Hquid prepolymers are cast using automatic metered casting machines, and the thermoplastic peUets are processed like aU thermoplastic materials on traditional plastic equipment. The unique property of the urethanes is ultrahigh abrasion resistance in moderately high Shore A (75—95) durometers. In addition, tear, tensUe, and resistance to many oUs is very high. The main deficiencies of the urethanes are their resistance to heat over 100°C and that shear and sliding abrasion tend to make the polymers soft and gummy. 

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