| 摘要 |
The figure shows a cross-section through a piston (10) and cylinder wall (12) of an internal combustion engine. A piston ring (14) is located within a ring groove (16) and the piston (10). The piston ring (14) is part of an oil film thickness measurement section (18), the other parts of which comprise a displacement transducer (20) and an electrical signal conditioning unit (22). The oil supply control system also includes a control system section (24), which comprises an on line calibration section (26), an oil injection system (28) and a controller (30). Also, a user interface (38) and a secondary signal conditioning unit (40) receiving secondary signal measurements from unit (42) or several units (42) are included.
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