The testing of the engine is necessary for understanding the efficient operation of the engine and the engine components. The operation of the new engine depends upon the surface finish, tolerance and lubrication & cooling system. … The testing results can be analyzed for knowing the performance of the engine.
What is the purpose of engine testing?
Testing the operating behavior of internal combustion engines is the common purpose of engine test stands. Various parameters like fuel consumption or exhaust gas behavior were generally measured as a function of torque and rotary speed and mapped in an engine performance map.
What is testing method of IC engine?
The method of finding indicated power of one cylinder of a multi-cylinder I.C. engine without the use of a high speed indicator is known as the Morse test. The engine is first run under the required condition of load, speed, temperature, etc., and the brake power is measured accurately.
What are the measures of IC engine performance?
Basic design and performance parameters in internal combustion engines include compression ratio, swept volume, clearance volume, power output, indicated power, thermal efficiency, indicated mean effective pressure, brake mean effective pressure, specific fuel consumption, and more.
Which test is used to examine engine performance efficiency?
The New European Drive Cycle (NEDC) is an important performance metric for internal combustion engine efficiency.
Why is dynamometer used?
A dynamometer, or “dyno” for short, is a device for measuring force, moment of force (torque), or power. … A dynamometer can also be used to determine the torque and power required to operate a driven machine such as a pump.
What is the purpose of Morse test?
The purpose of Morse Test is to obtain the approximate Indicated Power of a Multi-cylinder Engine. It consists of running the engine against a dynamometer at a particular speed, cutting out the firing of each cylinder in turn and noting the fall in BP each time while maintaining the speed constant.
What are various types of engine testing?
Engine Testing Methods
- Loaded Hot Testing.
- Unloaded Hot Testing.
- Non-Firing Testing.
What is speed test in IC engine?
Variable Speed Test with CI Engine:
Following the procedure of the SI engine test, the brake is adjusted until the lowest operating speed is obtained with the fuel pump injecting a quantity of fuel sufficient to make the exhaust gas of the engine slightly coloured.
What is engine performance and testing?
Engine performance is often characterized by the engine operating behavior in the speed–load domain, for example, the behavior of emissions, fuel consumption, noise, mechanical and thermal loading. … Engine testing is summarized in Martyr and Plint (2007).
What is indicated power in IC engine?
The indicated power of an I.C engine is the total power developed within the cylinder in one complete cycle neglecting any losses. It is the sum total of the brake power and the friction power of an engine. … An Indicator diagram is taken to access the performance of each cylinder unit for an engine.
What are the effects of knocking?
Explanation: The effects of knocking are. i) noise and roughness. ii) mechanical damage. iii) carbon deposits. iv) increase in heat transfer.
What is the difference between SI and CI engine?
Difference Between Si engine and Ci engine
Si engine is internal combustion engine that operates on the principle of spark ignition. It uses petrol and utilizes the Otto cycle. The diesel (Ci) engine is also an internal combustion engine, which uses diesel fuel and operates on diesel cycle.
What is mechanical efficiency of IC engine?
Mechanical efficiency is defined as the ratio of brake power (delivered power) to the indicated power (power provided to the piston). … This is the actual power available at the crankshaft and may be called the power output of the engine. It is always less than indicated power.
How fuel consumption is measured in IC engine?
Fuel Consumption Measurement Fuel consumption is measured in two ways : (a)The fuel consumption of an engine is measured by determining the volume flow in a given time interval and multiplying it by the specific gravity of the fuel which should be measured occasionally to get an accurate value.
What is indicated thermal efficiency of IC engine?
Indicated thermal efficiency (η ith)
Indicated thermal efficiency is the ratio of indicated power (ip) and energy in fuel per second.