Method for Checking the Leak Tightness of a Combustion Engine Having an Exhaust Gas Turbocharger, and Exhaust Gas Turbocharger

摘要

An exhaust gas turbocharger includes a housing having an exhaust gas inlet and an exhaust gas outlet. The exhaust gas turbocharger also has a turbine wheel rotatably mounted in the housing. The exhaust gas turbocharger includes a shut-off device that can adopt both an open and a closed state, a fluid connection existing in the open state and allowing exhaust gas which enters via the exhaust gas inlet to flow to the exhaust gas outlet, bypassing the turbine wheel. When the housing is supplied with compressed air, the exhaust gas turbocharger is at least substantially airtight.

主权项

1. A method for testing leak-tightness of an internal combustion engine before initial commencement of operation, the internal combustion engine being equipped with an exhaust-gas turbocharger, the method comprising the acts of:
sealing off an exhaust tract of the internal combustion engine at a location upstream of the exhaust-gas turbocharger; sealing off a housing of the exhaust-gas turbocharger at an actuation device of a shut-off device of the exhaust-gas turbocharger such that no air can escape from the housing into surroundings of the actuation device; generating a positive pressure in the exhaust-gas turbocharger; and comparing an occurring pressure loss or leakage volume flow with a predefined pressure loss or leakage volume flow.