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Cyclic Irregularities in Idle and Fuel Delivery Variation of a Rotary Fuel Injection Pump
Technical Paper
2004-32-0056
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper deals with the problem of cyclic irregularities during idling in relation with port to port fuel delivery variation of rotary Fuel Injection Pump (FIP) for a diesel engine. The relation is demonstrated on a two cylinder engine, where problem of high cyclic irregularities was observed for which the root cause was identified as the fuel delivery variation from the FIP, which was later taken up for the improvements in the design. This paper discusses the technical approach used in identifying the root cause for the high cyclic irregularities and the solution of the problem. It is demonstrated how angular acceleration of the crankshaft free end can be used to diagnose the non-uniformity of combustion in different cylinders which leads to higher cyclic irregularities. The solution discusses the improvements done in the hydraulic passages of the head and rotor of the FIP for line to line fuel delivery variation control.
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Citation
Kant, K., Pati, A., Viswanath, B., and Thiyagarajan, R., "Cyclic Irregularities in Idle and Fuel Delivery Variation of a Rotary Fuel Injection Pump," SAE Technical Paper 2004-32-0056, 2004, https://doi.org/10.4271/2004-32-0056.Also In
References
- Zhang Limei Liu Weiguo Zhang Feng Wu Bo Diagnosis of the Working Unevenness of Each Cylinder by the Transient Crankshaft speed SAE paper 960463
- Taraza Dinu Henein Naeim A. Bryzik Walter Diesel Engine Diagnosis Based on Analysis of the Crankshaft's speed Variation SAE paper 982540
- Taraza Dinu Henein Naeim A. Bryzik Walter Determination of the Gas-Pressure Torque of a Multicylinder Engine from Measurements of the Crankshaft's Speed Variation SAE paper 980164