Electronic control device for internal combustion engine, has recess in housing casing forming ventilation opening that has larger cross-section on external side than on internal side

摘要

The housing casing (20) has recesses (24) formed in a surface (22), with a ventilation opening (25) formed between each recess and a cover (30), to establish a fluid connection between the inside (Rs) of the housing and an external environment around the housing. A sectional area of the ventilation opening on the external side is larger than its area on the internal side.