Dynalec Controls Pvt. Ltd

Shivane, Pune, Maharashtra

• ype: Non mixing closed loop cooling system
• Temperature range: 80°c~95 °c
• Temperature Satbility: ± 0.2 oC steady state , ± 2 oC dynamic
• Indicating accuracy: +-1.0°c

The Engine Cranking System consists of an AC Motor with Belt & Pulley Arrangement for giving drive to shaft of the starting mechanism. The starting mechanism uses pneumatic cylinders to push the shaft which is provided with a toothed ring for engagement with mating toothed ring on the dyno shaft. A Frequency Controller (V.F.D.) is used for cranking engine at a desired speed of cranking. The engine cranking unit (positioned at non-driving end of dyno) and Dyno are mounted on a common base-frame. The frequency controller is used for cranking the engine at a desired speed of cranking and also for smooth engagement of cranking mechanism. When ‘ENGINE CRANK’ command is given, AC motor starts running at a slow speed and at the same time pneumatic cylinders push forward the drive shaft of the starting mechanism forward. The toothed ring mounted on the drive shaft gets engaged with the mating toothed ring mounted on the non-driving end of the dyno rotor shaft and as soon as it gets engaged which is sensed by a proximity switch, motor starts running at cranking speed set on the VFD.

This system is suitable to control the fuel (diesel) temperature within the range of +40 oC to +45 oC (6 oC higher than cooling tower water temperature) throughout the test, at the engine inlet. For lower temperature range chiller is provided. Fuel from the in-cell tank is passed through a heat exchanger, which is made of SS sheet metal.  The water controlled at specific desired temperature is used to remove heat from fuel flowing through the heat exchanger. It is observed that the temperature of fuel is maintained with ± 1 oC. The system comprises: Digital Temperature Indicating Controller For Heater A heater Bosch Fuel Pump Air Separator A sight flow indicator is provided in the fuel circuit for visual flow indication. Following Auto functions are provided: Auto priming module for fuel Auto venting valve with interlock Auto fuel draining (Suction type)

• Supply for Insturment: 220 V ±10% AC, 50 Hz, Single phase
• Supply for Drive: 415 V ±10% AC, 50 Hz, three phase
• Dimensions for Instrument: 19” sub-rack of 2U size (88 mm)
• Dimensions for Drive: 380(w)x300(d)x600(h) mm
• Control accuracy:  ± 0.2% of the set value
• Adjusting path: 10.0cm (maximum)
• Response Time: 400ms

This unit is used for the remote control of throttle lever of an engine under test. The actuator is controlled such that the demand position set on the potentiometer is held constant.  The System will have retention of the position even after power failure.   The system comprises: 1. An AC servo geared motor with resolver feedback  (LENZE/ABB make) 2. Suitable servo drive for above motor  (LENZE/ABB make) A position feed-back system for close-loop control A precision multi-turn potentiometer with calibrated dial to set the position and Analog Indication of throttle % position A suitable mounting stand is provided for Servo Motor installation in the test-cell.

• PC interfacing: Thru’ RS 485 (for actual weight consumed & fuel consumption time)  
• Range: 10 to 200 g or 50 to 500 g – any value can be set on instrument / PC
• Indicating Accuracy: ± 0.2% of fsd for weight , ± 0.1 s for time
• Resolution: 0.1 g for weight , 0.1 s for time
• Setting of Time/Weight: Special function keys on the keypad
• Disply(for Weight/time): LED
• Time base: Crystal Oscillator
• Alarms: For high and low fuel levels with trip at high level.

The dynamometer comprises: The basic electro-mechanical unit mounted on trunnion bearings A 60 teeth gear-wheel mounted at the non-driving end of the dynamometer to sense the dynamometer- speed Mounting arrangement for magnetic pick-up and load-cell Temperature sensors to monitor loss plate temperature Pressure switch for low-water pressure alarm at water inlet Flow Switch for low water flow alarm at water inlet Pressure gauge for water-inlet pressure indication Adaptor plates for propeller shaft coupling Junction box