Measuring and testing – Internal combustion engine or related engine system or... – Compression
Reexamination Certificate
2006-11-21
2006-11-21
McCall, Eric S. (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Compression
C073S118040
Reexamination Certificate
active
07137295
ABSTRACT:
A malfunction of a thermostat in a coolant circulating path is detected from an engine side coolant temperature in consideration of the following behavior of the coolant temperature. When an open-malfunction occurs, the coolant temperature becomes different considerably from that in the normal time in the temperature range in which the thermostat is to be normally closed. When a closure-malfunction occurs, the coolant temperature becomes different considerably from that during the normal time in the temperature range in which the thermostat is to be normally opened. Alternatively, the malfunction may be detected from a difference between the engine side coolant temperature and a radiator side coolant temperature.
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Ichikawa Akira
Wakahara Keiji
Denso Corporation
McCall Eric S.
Nixon & Vanderhye PC
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