Before commissioning The flame-start system is only operational if the engine is started within 30 seconds of the flame-start system indicator lamp going out. To increase braking power, the engines can be equipped with an engine brake valve on the exhaust gas turbocharger in conjunction with constantly-open throttle valves on the cylinders. Engine exhaust brake/constantly- open throttle valves* i If the flame-start system indicator lamp does not go out after more than 20 seconds, there is a malfunction in the flame-start system.
2 While the exhaust gas back pressure from the engine brake valve can be used to in- crease the braking power, the constantly- open throttle valves cause a pressure re- duction in the working cycle (3rd stroke), while compression (2nd stroke) is practi- cally unaffected. i Also observe the "Diesel fuels" ( page 62) and "Coolant" ( page 65) sections when operating the engine at low outside tempera- tures. The constantly-open throttle valves are small valves which are integrated in the cylinder head and located on the side op- posite the exhaust valve. When open, they form a connection from the combustion chamber to the exhaust port.
Control of the constantly-open throttle valves 29 General remarks