Technical Specifications

SYSTEM DESCRIPTION: Basic Unit Study of performance of internal combustion engines & its calculation is important feature of this trainer. System is having unique feature of calculating all efficiency of internal combustion engine including heat balance sheet. The Engine & Dynamometer is mounted on base structure.  Sci-tech has design the system in such faction that easily operate; demonstrated & requisite experimentation can be performed. System has facility of measuring Engine brake load, speed, consumption of air, consumption of fuel, temperature at different locations, mass flow of water.

Computerization Unit

System is having unique feature of direct reading & automatic calculating all efficiency & heat balance sheet of internal combustion engine. The online graphical representation of important parameter is displayed on screen to see effect of change in load or speed. Final result & graph are in built available in software. System has facility of measuring Engine brake load, speed, consumption of air, consumption of fuel, temperature at different locations, mass flow of water.   P- q / P-V Arrangement Console: System is having unique feature of direct Engine Dynamic Pressure & Engine crank angle  or Engine Volume (V) can be measured & plot on computer screen. It gives online representation of Engine Dynamic Pressure & Engine crank angle  to study effect of change in load & speed. For correct sensing of Pressure, quartz type transducer from PCB USA or same quality is used. System is having unique feature of direct control of Engine load or speed from keyboard & mouse. This system is having automatic operation controller & actuator. This can control parameter online of engine operation.  

SYSTEM COMPONENTS

BASIC UNIT:

• Engine: Multicylinder Petrol or Diesel Engine

(Choose any one from List motioned below)

• Three Cylinder Four Stroke MPFI Petrol Engine: 796 cc, Max. Power 29 kW @5500 RPM
• Four Cylinder Four Stroke MPFI Petrol Engine: 1405 cc, Max. Power 55 kW @ 5500 RPM
• Four Cylinder Four Stroke Diesel Engine: 1995cc, Max. Power: 37 kW @ 4000 RPM
• Four Cylinder Four Stroke Diesel Engine: 1405 cc, Max. Power 39kW @ 5000 RPM
• Dynamometer suitable for above mentioned Engine.

(Choose any one from List motioned below)

• Hydraulic Dynamometer (Capacity: 37 kW @ 3000 RPM)
• Eddy current Dynamometer (Capacity: 10 KW, 20KW, 30 KW, 80KW, 150KW)
• Calorimeter- Shell & Tube type heat exchanger will be used. Water-cooled.
• Air Box – MS powder coated / PVC air box with orifice meter will be used.
• Fuel Tank: capacity 5 liters.
• Base frame – Made up of ms C channel duly powder coated.
• Control Panel – for mounting of all indicators.
• Digital Temp. Indicator with temperature sensor – 6 channel 0-400°C (Optional)
• Rotameter: 600 LPH for calorimeter water flow measurement.
• Electrical switches, wiring & Piping

      COMPUTERISATION UNIT:

• Sensors: Engine RPM, Air Fan RPM, Fuel Level, Thermocouples, Load Cell.
• Transmitters console: Engine RPM; Engine torque; Air flow measurement; Fuel flow measurement; Temperatures; Cooling water flow measurement. (Optional)
• Data acquisition system: 16 channel analog input, 1 channel analog output. 30 MHz. speeds.
• Computer: P IV with monitor, keyboard, mouse full system.(Optional)
• : Specially developed Labview of National Instruments USA software for data acquisition, on line display, graphical -representation, calculation & result sheet with online HELP.

              P- q, P- V ARRANGEMENT CONSOLE (Optional)

• Engine cylinder pressure.
• Piston position marker.

EXPERIMENTS

• Calculation of Mechanical Efficiency & Plot brake power versus mechanical efficiency.
• Measurement & Calculation of Volumetric efficiency.
• Measurement & calculation of specific fuel consumption
• Measurement & calculation of brake thermal efficiency
• Determining air / fuel ratios
• Heat Balance Test
• Brake Mean Effective Pressure and brake power on the basis of engine speed
• Plotting of exhaust temperature versus Speed

Study of Engine Dynamic Pressure & Crank Angle q. (If P- q Arrangement Console is ordered.)

• Calculation of Indicated Mean Effective Pressure. (If P – V Arrangement Console is ordered)
• Computer controlled of parameter like load or Engine speed. (If Computer controlled Unit is ordered.)

  Dynamic Controllers Features

• Simple & Analogue Electronics based circuits.
• 19” Industrial Rack Enclosure enables ease of maintenance.
• Modular Torque & Speed Indicators enable easy maintenance / replacement avoids the    system from total operational failure.
• 3 modes of closed loop operation – Viz. Constant Torque, Constant Speed and Constant Current Mode. Constant Current mode helps to operate dynamometer very close to constant Torque mode and is suitable for testing Governed engines and Motors where speed control is not important.
• Loading/Unloading of Dynamometer by potentiometer.
• Highly Precise Control of excitation current is obtained through’ PID loop.
• Annunciation & Excitation cut-off, for high temperature & low water pressure conditions.
• Constant Torque mode – Input required is 0-10 V conditioned retransmission output form    Load Indicator. The PID Card constantly tracks the actual torque input with value set by    the potentiometer and adjusts the Dyno. Current to maintain the desired torque.
• Constant Speed mode – Input required is 0-10 V conditioned retransmission output form RPM Indicator.
• The PID Card constantly tracks the actual Speed input with value set by the potentiometer and adjusts the Dyno. Current to maintain the desired Speed within control limits.
• Loading/Unloading of Dynamometer by potentiometer.
• Loading can be controlled by External analogue signal if required.

  Dyno load controllers are designed to give a cost-effective solution for Load Control Eddy Current Dynamometers.   Features

• Simple & Analogue Electronics based circuits. Constant Current mode helps to operate dynamometer very close to constant Torque mode    and is suitable for testing Governed engines and Motors where speed control is not    important. Loading/Unloading of Dynamometer by potentiometer. Highly Precise Control of    excitation current is obtained thro’ PID loop. Annunciation & Excitation cut-off, for high-  temperature & low water pressure conditions. • Loading/Unloading of Dynamometer by potentiometer • Loading can be controlled by External analogue signal if required

  Universal Engine Mounting Test – Beds  These are available in 4 models to suit mounting of engines from single cylinder to 8/10-cylinder engines. Models available are T1, T2, T3 & T4 respectively These beds enable using the same dynamometer for a variety of Engines and mounts, as it is acts as a Floating Foundation which can be adjusted to match the engine / prime-mover center with that of dynamometer shaft.