Comprehensive influence of compression ratio and viscosity of engine oil on starting characteristics of modern truck diesel engine
EDN: PMSYQD
Abstract
Introduction (problem statement and relevance). Starting diesel engines at low temperatures is one of the critical tasks in truck operation. Organizing of the start requires auxiliary equipment, complication of the engine and vehicle design and, as a consequence, their cost increase, as well as additional maintenance. Starting a cold engine at low temperatures is accompanied by reduced engine life, excessive fuel consumption and increased hazardous substance emissions in exhaust gases. Starting characteristics of vehicle diesel engines depend on their design and performance parameters: compression ratio, fuel supply parameters, crankshaft antitorque moment, electric starting system power, properties of fuels and oils used, etc.
The purpose of the study is to assess the influence of compression ratio and viscosity of engine oil on the starting characteristics of a truck diesel engine.
Methodology and research methods. The paper uses theoretical bases of study of starting characteristics of internal combustion engines, assessment of engine operation process parameters during starting, as well as theoretical bases of chemmotology. The experimental studies were performed using modern procedures and with certified equipment.
Scientific novelty and results. A comprehensive approach to assessment of starting characteristics of a diesel engine was developed, and an algorithm of starting tests was created; theoretical assumptions about the influence of compression ratio and kinematic viscosity of engine oil on engine starting characteristics were confirmed.
Practical significance. The study results can be used to optimize engine operation parameters at low temperatures, which is especially relevant for regions with cold climates.
About the Author
I. F. Gumerov
KAMAZ Inc.
Russian Federation
Russian Federation
Gumerov I.F. – PhD (Eng), first deputy general director of PJSC KAMAZ – executive director
Naberezhnye Chelny 423800
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Review
For citations:
Gumerov I.F. Comprehensive influence of compression ratio and viscosity of engine oil on starting characteristics of modern truck diesel engine. Trudy NAMI. 2025;(1):63-74. (In Russ.) EDN: PMSYQD
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