An open chamber (DI) diesel engine of bore diameter D has three valves, two intake valves and one exhaust valve. Assume a lift of the exhaust valve to be Le = 4 mm and the exhaust gas temperature Te = 1000K. Air temperature at the intake valves is Ti = 298 K. Under these conditions, calculate the following; 1. The exhaust valve diameter, De. 2. Each intake valve diameter, D. 3. The intake valve maximum lift, L. 4. Draw a scaled projection of this engine head.