E
lectronic Valve Internal Combustion - 1 cylinder 1" bore 1"stroke
This EVIC - 111 has the Mk2 head design but is only using one solenoid per valve.
It is running with the Mk2B electronics and will be used for demonstrations at model engineering shows. The current speed range is 1300 to 7000 rpm. It has a built up aluminum crankcase. The crankcase volume has been increased by making the crankcase the full width of the base.
Construction was started by David McQueen in the Spring of 2003. Unfortunately David lost interest in the project and as a result sold the uncompleted engine to me in January 2004. I completed the engine and ran it for the first time on March 8th. Compression was poor and the engine would not run below 3500 rpm. A new piston was constructed and installed on March 11, 2004. With this new piston performance met all expectations. The "Electronic Throttle" works well. The Hit and Miss demo works perfectly.
This engine has modest valve lifts. The intake is 0.032" and the valve spring provides 2lb 2oz of force. The exhaust is 0.028" and the valve spring provides 2lb 0oz of force. The engine is running with the September 2002 Mk2B software.
The photo below shows the 2 Bicron SP2515P0300 solenoids. Note that the head is turned 90 degrees like my 2nd EVIC. But the spark plug is on the other side in this engine. The simple carburetor has a venturi is 7/32" that gives good fuel draw over the entire speed range.
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The photo on the right shows the Hall effect TDC sensor, the wires running to the BDC sensor and the sensor disk with its rotating magnet. The large flywheel ensures a low, 1300 rpm, idle speed.