Viscosity measuring apparatus
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United States of America Patent
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Sep 5, 2017
Issued Date -
N/A
app pub date -
Jun 18, 2012
filing date -
Jun 18, 2012
priority date (Note) -
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Abstract
A viscosity measuring apparatus is mounted on a vehicle provided with an engine, a cylinder pressure sensor configured to detect cylinder pressure which is inner pressure of a cylinder of the engine, a fuel injection valve configured to supply fuel to the engine, and a temperature sensor configured to detect temperature of a coolant of the engine. The viscosity measuring apparatus is provided with: an estimating device configured to calculate a cooling loss from a heating value of the cylinder based on the cylinder pressure detected by the cylinder pressure sensor and an input heating value of the cylinder, and to estimate viscosity of the coolant on the basis of the calculated cooling loss.
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