Ref.No.AEC/2015-16 Dt.27.04.2015

ToThe Principal Mahatma Gandhi Instt., of Tech.,Kokapet (Vill) , Rajendranagar (Mdl) Chaitanya Bharati Post, GandipetHYDERABAD - 500 075 

Dear Sir,Specification for the VCR Engine Test Rig

Sl.NO EQUIPMENT01 VARIABLE COMPRESSION RATIO ENGINE TEST RIG(FOR

CONDUCTING ECONOMICAL SPEED TEST)

TECHNICAL DATA: Make of Engine : GREAVES LTD Type of Engine : 4 Stroke Bodre: 70mm Stroke : 66.7mm Normal compression ratio: 4.67:1 No of Cylinder: 01 Type of Cooling: Air Natural Rated Power: 2.5HP Rated Speed: 3000RPM Tupe of start: Self start with battery Variable compression ratio:Auxiliary head Loading Arrangements: Eddy Current Dynamometer

MODIFICATION FOR VARIABLE COMPRESSION USING AUXILIARY HEAD

Make of Engine: TTE-BANGLORE Type of Engine: 4 Stroke No of Cylinder: 01 Type of Cooling: Water Cooled Bore: 70mm Stroke: 33mm Variable compression ratio: 2.5:1 to 10:1 Rated Speed: 3000 RPM Continuous running on compression: 4.67:1 to 8:1 for 3 hours Variable Arrangements: Screw rod method

EDDY CURRENT DYNAMOMETER: Make: Power mag

Torque rating available: 1 Kgm Speed: 3000RPM Ventilation: Air-cooled, self-ventilated, Drip-proof, Totally

enclosed-Fin cooled. Coil Voltage: 90 V.D.C. Max.

MEASUREMENTS AND INSTRUMENTATION:a) Fuel measurement(Petrol): Fuel Tank/Burrette/3-Way Cock

along with Digital fuel rate indicator in kg/hr.b) Fuel measurement(LPG): Digital fuel rate indicator in kg/hr

(LPG cylinder not in the Scope of supply/provide cylinder at the time of Demonstration)

c) Air measurement: Air Tank/Orifice Plae/Manometer along with Digital indicator for Airflow and rate in mm and m³/sec

d) Temperature Measurement: Digital temperature indicator with selector switch for 3 different Temperature and Sensing point Using ‘k’ type thermocouple

e) Sensing points: 1.Exhaust gas outlet from engine 2. Air passing over engine Head 3.Ambient temperature

f) Torque Measurement: Digital Torque indicator in NM, for eddy current Dynamometer using potentiometer type loading

g) Speed measurement: Digital indicator Speed indicator in rpm, range 0 to 9999 with Proximity sensor

EXPERIMENTAL CAPABILITIES: Specific fuel consumption -SFC Brake horse power -BHP Brake thermal efficiency - ή Bth Volumetric efficiency -ή Vol Graphs - bhp vs sfc/ή Bth/ή Vol