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Two Novel Diesel Injection Systems
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Abstract
Two novel diesel injection systems have been tested in prototype form. Both are intended to overcome particular deficiencies of conventional equipment which are especially pronounced in small high-speed engines.
The ‘Fuel Hammer’ system for direct-injection engines has three main objectives: avoidance of the need for high-pressure pumping elements, separation of the pumping and control functions, and elimination of high impulsive torques in the pump drive.
These objectives were achieved by utilising the phenomenon usually called ‘water hammer’. Sufficiently high injection pressures were generated by rapidly halting a moving column of fuel. A continuously-operating pump thus generated injection pressures ten times higher than its delivery pressure. Injection data are given for a range of conditions.
The ‘Rapid Spill’ system is primarily intended for small high speed direct-injection engines whose performance is very dependent on the mean injection pressure attainable. A pressure-intensifier in the injector substantially increased the mean injection pressure. A very rapid end of injection was obtained by spilling at the injector rather than the pump. Reductions in injection period of up to 30% were achieved with no changes to pump or nozzle.
The features of both systems are discussed in the context of the injection system characteristics ideally required by modern diesels.
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Citation
Ball, W., "Two Novel Diesel Injection Systems," SAE Technical Paper 840272, 1984, https://doi.org/10.4271/840272.Also In
References
- Parker R.F. “Future Fuel Injection System Requirements of Diesel Engines for Mobile Power.” SAE 760125
- Greeves G. “Response of Diesel Combustion Systems to Increase of Fuel Injection Rate.” SAE 790037
- Eblen V.E. Stumpp G. “Beitrag des Einspritzsystems zur Verbesserung des Diesel motors.” Bosch Techn. Berichte 6 1978 2 70 81 Robert Bosch GmbH
- Ball W.F. “Einflusse des Einspritzdruckes auf die Verbrennung bei Dieselmotoren mit Direkteinspritzung ohne Luftdrall.” MTZ 42 4 141 149 1981
- Ball W.F. Hil R.W. “Control of a Light-Duty Indirect Injection Diesel Engine for Best Trade-Off between Economy and Emissions.” IMechE Paper C122/82
- Pettifer H.F. “Interaction of Port Design and Injection Rate for a DI Diesel.” SAE 820358
- Barnes-Moss H.W. Scott W.M. “The Light Duty Diesel Engine for Private Transportation.” SAE 750331
- Wessel W.G. Joachim E-U “A Strategy for Optimisation of Diesel Fuel Injection Systems.” SAE 790036
- Berchtold M. Ganser “A Fuel Injection System for Passenger Car Diesel Engines.” CIMAC Conference Paris 1983
- Wylie E.B. Streeter V.L. “Fluid Transients.” McGraw-Hill 1978
- Leach A. Unpublished project report. Brunei University 1982
- Küntscher V. “Eine Möglichkeit zur Verringerung der Kohlenwasserstoff-Emissionen von Zweitakt-Ottomotoren.” KFT April 1972 116 119
- Küntscher V. Olbrich C. Baumgärtel C. “A Two-Stroke Engine with Charge Stratification and Electronically Controlled Pressure Impact Injection.” IMechE Paper C401/80
- Küntscher V. “Charge Stratification and Lean Mixture Combustion Systems in Two-Stroke Otto Cycle Engines by means of Electronically Controlled Pressure Impact Injection.” Proc. ISATA Conference Cologne 1983 1 225
- Monaghan M.L. “The High Speed Direct Injection Diesel for Passenger Cars.” SAE 810477
- British Patent Application No. 8236753 1982
- British Patent No. 1118461 1965