XVI. The derivation of variable specific heat expressions for thermal efficiency and calorific value of working fluid, for use in internal combustion engine design

1947 ◽  
Vol 38 (277) ◽  
pp. 145-149
Author(s):  
C. Rogers
Keyword(s):  
Internal Combustion Engine ◽  
Specific Heat ◽  
Thermal Efficiency ◽  
Combustion Engine ◽  
Calorific Value ◽  
Internal Combustion ◽  
Working Fluid ◽  
Engine Design

scholarly journals On the specific heat of, heat flow from, and other phenomena of, the working fluid in the cylinder of the internal combustion engine

1906 ◽  
Vol 77 (520) ◽  
pp. 500-527 ◽  
Keyword(s):  
Heat Flow ◽  
Internal Combustion Engine ◽  
Specific Heat ◽  
Combustion Engine ◽  
Pressure Rise ◽  
Internal Combustion ◽  
Power Stroke ◽  
Working Fluid ◽  
Direct Observations ◽  
Compression And Expansion

The present investigation was undertaken with the object of determining the specific heat of, and heat-flow from, the highly heated products of combustion which constitute the working fluid within the cylinder of an internal combustion engine, by a method which permitted direct observations to be made upon an actual charge taken into the engine in the ordinary operations of its cycle. The method of experiment is very simple, and the writer believes it to be novel. It consists in subjecting the whole of the highly heated products of the combustion of a gaseous charge to alternate compression and expansion within the engine cylinder while cooling proceeds, and observing by the indicator the successive pressure and temperature-falls from revolution to revolution, together with the temperature and pressure rise and fall due to alternate compression and expansion. The engine is set to run at any given speed, and at the desired moment after the charge of gas and air has been drawn in, compressed, and ignited, the exhaust valve and charge inlet valves are prevented from opening, so that when the piston reaches the termination of its power stroke, the exhaust gases are retained within the cylinder, and the piston compresses them to the minimum volume, expands them again to the maximum volume, and so compresses and expands during the desired number of strokes.

Improving the design of an internal combustion engine with counter pistons

2021 ◽  
pp. 3-6
Author(s):  
Keyword(s):  
Internal Combustion Engine ◽  
Dynamic Characteristics ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Torque ◽  
Moment Vector ◽  
Engine Design ◽  
Torque Moment ◽  
Dimensional Parameters ◽  
Crank Mechanism

A new layout of a two-cylinder internal combustion engine with counter-pistons is proposed, which increases its efficiency by reducing the pressure angles. The dynamics of the proposed arrangement of a two-shaft crank-slider internal combustion engine, which provides maximum torque moment at maximum gas pressure in the minimum volume of the combustion chamber, is investigated, which reduces the load on the engine design and its weight and dimensional parameters. The research was carried out by comparing the dynamic characteristics of different engines using vector modular models and the KDAM program. Keywords: internal combustion engine, crank mechanism, indicator diagram, dynamic characteristics, torque moment, vector, contour, model, module [email protected]

Engine Enhancement Using Enriched Oxygen Inlet

2015 ◽  
Vol 48 ◽  
pp. 37-49 ◽  
Author(s):  
Singh P. Shivakumar
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Engine Performance ◽  
Calorific Value ◽  
Internal Combustion ◽  
Fuel Tank ◽  
Atmospheric Air ◽  
Oxygen Percentage

An internal combustion engine essentially requires a fuel which must have sufficient calorific value to produce enough power, and oxygen for the combustion of fuel. In normal vehicles fuel will be supplied from a fuel tank equipped with it. And oxygen will be taken from the atmospheric itself. Under normal conditions the percentage of oxygen present in atmospheric air will be around 21% of the total volume. Studies shows that by increasing the oxygen percentage in the inlet air increases engine performance and reduces emission produced by the engine.

Estimation of the efficiency of the thermal cycle of a piston internal combustion engine

2021 ◽  
pp. 18-22
Keyword(s):  
Internal Combustion Engine ◽  
Thermal Cycle ◽  
Power Plants ◽  
Combustion Engine ◽  
Mechanical Energy ◽  
Heat Content ◽  
Internal Combustion ◽  
Working Fluid ◽  
Heat Cycle ◽  
Hybrid Power Plant

Authors Rusinov R.V., Hoodorozhkov S.I., Dobretsov R.Yu., [email protected]. Estimation of the efficiency of the thermal cycle of a piston internal combustion engine The article proposes a simplified technique for the operational assessment of the efficiency of the heat cycle of a piston internal combustion engine. A feature of the developed computational model is the release of the amount of heat consumed for the production of only mechanical energy in the form of a separate component of the heat balance of the cycle. The value of this component is determined by calculation (or according to the results of experiments) in advance, which makes it possible to reduce the number of pre(determined initial data. The methodology is based on a mathematical description of thermodynamic processes occurring during the development of the thermal cycle of an engine with ignition of the working mixture from compression (diesel engine), which allows it to be expanded to new engines of design, including those operating under electronic control. The objects for the application of the calculation method can be diesel engines installed on transport vehicles, both individually and as part of a hybrid power plant, as well as engines of stationary or transportable power plants. The very principle underlying the model can be implemented for engines of other purposes and other thermal cycles. Keywords: heat cycle; the working process; diesel; heat content of the working fluid; expansion

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