In the manufacturing industry it is of great importance to reduce machining deviations as soon possible avoid cost associated with reworks. The definition mathematical models that predict future errors in components combustion engines, a way helps save time and money process.
 This paper proposes analysis establishment correlations between cylinder heads rejections an engine cold testing a...

Abstract The poppet valve is by far the most widely used in cylinder head design of internal combustion (IC) engines; however, valves themselves create significant flow restrictions during both intake and exhaust strokes, thus causing a reduction volumetric efficiency that affects overall engine performance. By removing restrictive from path air into out allowing to unobstructed, any given IC c...

At partial load, traditional automotive gasoline engines have high pumping losses due to the throttling of intake charge for load control. Variable Valve Timing (VVT) and introduction externally cooled EGR could reduce but only with a very limited effect. On other hand, in medium full range, engine cannot utilize compression ratio limitations knocking. A variable displacement, device which util...

Electronic speed governors have become widespread on marine diesel engines. In comparison with hydromechanical ones, they an additional setting parameter – input signal sensitivity. This allows changing the response of to high-frequency disturbances. camshaft engines, such disturbances are generated when cams run over fuels pump push rods, while in ME (MAN Energy Solutions) or RT-flex (Wärtsilä...

The object of research is gas-dynamic vortex processes in heterogeneous polydisperse flows. One the most problematic issues engine building completeness combustion and rate fuel burnout given coordinates on allotted hourly interval chamber. These indicators, turn, determine stringent requirements for used fuels terms thermophysical parameters that affect sawing, evaporation mixing with an oxidi...

The effects of the valve opening and opening height are very crucial in internal combustion engine. The optimum setup for the opening cam high and timing of camshafts in engines will improve fuel economy and exhaust gas emission. This improvement can be obtained from intake (inlet) valve timing and also from exhaust (outlet) valve timing. The challenging technique is to set up the engine to the...

Abstract In the field of Internal Combustion Engines (ICEs), increasingly stricter regulations on pollutant emissions have made necessary to continuously monitor engine operation. Indeed, in order tackle fault-induced variations performance, continuous, real-time data related engine’s thermodynamic cycle is needed: specifically, obtaining detailed information combustion phase paramount. indicat...

Engines equipped with camless valve trains will have greater space for performance optimization. In this paper, based on the electromagnetic actuated valve train system, one-dimensional and three-dimensional simulation models on engine thermodynamic cycle and in-cylinder charge motion are established, respectively. With the application of early-intake-valve closing (EIVC) strategy，unthrottled l...

Tradeo s between low feedgas emissions and smooth brake torque are discussed in the context of an engine equipped with variable camshaft timing VCT The use of VCT lowers the generation of feedgas emissions but adversely a ects the torque response However with the addition of an electronic throttle and knowledge of online torque the tradeo s between emissions and drivability in the VCT engine ca...