Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2008-12-11
2010-12-28
Le, John H (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C073S049700, C073S114160
Reexamination Certificate
active
07860670
ABSTRACT:
A device for detecting a leak in a cylinder of an internal combustion engine, the internal combustion engine including a piston in the cylinder, the piston being attached to a crankshaft, includes a time interval determining unit which is designed to determine a first time interval in which the crankshaft passes a preset first angle segment before reaching the ignition top dead center of the piston in the cylinder, and to determine a second time interval in which the crankshaft passes a preset second angle segment after reaching the ignition top dead center of the piston in the cylinder, and a cylinder leak determining unit which is designed to detect a leak in the cylinder as a function of the first time interval and as a function of the second time interval.
REFERENCES:
patent: 5786531 (1998-07-01), Lewis et al.
patent: 5945593 (1999-08-01), Magiera et al.
Kenyon & Kenyon LLP
Le John H
Robert & Bosch GmbH
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