October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Exhaust Secondary Valve

The exhaust secondary valve regulates overall maximum pressure and controls the secondary pressure in 'Low' for engine speeds up to 1600 - 2000 rpm. This valve improves creep quality that is better at lower secondary pressures. It also creates a smooth transition from the level in creep to the level in low at higher engine speeds. The valve is closed if not in low ratio.