The wear analysis for cam mechanism of diesel fuel injection pump based on multibody dynamics theories

2011 ◽  
Author(s):  
Wu Xinying ◽  
Ouyang Guangyao ◽  
Tan Di
Keyword(s):  
Multibody Dynamics ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Cam Mechanism ◽  
Injection Pump ◽  
Wear Analysis ◽  
Fuel Injection Pump ◽  
Diesel Fuel Injection

scholarly journals THE RESEARCH INTO THE DISAXIAL CAM MECHANISM FOR DIESEL FUEL ‐ INJECTION PUMP

Transport ◽  
2005 ◽  
Vol 20 (6) ◽  
pp. 225-231
Author(s):  
Evgeny Tausenev ◽  
Andrew Svistula
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Practical Realization ◽  
Comparative Tests ◽  
Cam Mechanism ◽  
Injection Pump ◽  
Fuel Injection Pump ◽  
Side Face ◽  
Maximal Angle ◽  
Diesel Fuel Injection

A cam mechanism is named disaxial due to the offset of a plunger axis concerning the axis of a camshaft. The named offset allows to reduce the maximal angle of pressure. There is decrease of contact pressure in a pair of a cam and a roller and the pressure upon the side face of a guide sleeve. Theoretical researches into the influence of the offset and other elements of a cam mechanism on the specified pressure and kinematics of a plunger are resulted. Examples of practical realization of disaxial designs are shown. The results of comparative tests of fuel‐injection pumps with disaxial and without disaxial are shown.

Surface Roughness Effects on Hydrodynamic Lubrication and Scuffing Failure Analysis of Axially Grooved Plunger of a Rotary Diesel Fuel Injection Pump

2004 ◽  
Author(s):  
M. Afzaal Malik ◽  
Badar Rashid ◽  
Shahab Khushnood ◽  
Raja Amer Azim
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Hydrodynamic Lubrication ◽  
Roughness Effects ◽  
Injection Pump ◽  
Fuel Injection Pump ◽  
Scuffing Failure ◽  
Diesel Fuel Injection

The wear between the plunger and plunger sleeve of rotary diesel fuel injection pump causes considerable decrease in injection pressure and the quantity of fuel to combustion chamber of an engine, which ultimately leads to failure of engine assembly. This research investigates the cause of failure particularly focusing on surface roughness effects to hydrodynamic lubrication and scuffing failure due to abrasive contaminant. The surface roughness of plunger and plunger sleeve were measured and incorporated in Reynolds equation to analyze roughness effects on hydrodynamic lubrication. The critical particle size of the dust normally present in the diesel fuel is evaluated to determine which test dust sample could cause systems to fail. Based on this information, scuffing failure of pumps due to an abrasive contaminant partially penetrated in the plunger sleeve is analyzed. The abrasive contaminant is modeled as a spherical shaped rigid particle. Excessive temperature rise between the particle-plunger interface is used as an indication of whether scuffing would take place. Experiments were conducted to determine parameters such as particle size of dust samples, surface roughness of plunger and plunger sleeve, specific heat of diesel fuel, diesel fuel density, quantity of fuel flow and radial clearance. These experimentally determined parameters are then used as input in our computer program to lend more confidence to our predicted results.

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