| US 7,537,382 B2 | ||
| Method of estimating temperature of gas mixture for internal combustion engine | ||
| Taku Ibuki, Susono (Japan); and Shigeki Nakayama, Susono (Japan) | ||
| Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota (Japan) | ||
| Appl. No. 10/584,940 PCT Filed Feb. 08, 2005, PCT No. PCT/JP2005/002188 § 371(c)(1), (2), (4) Date Jul. 05, 2006, PCT Pub. No. WO2005/075802, PCT Pub. Date Aug. 18, 2005. |
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| Claims priority of application No. 2004-32950 (JP), filed on Feb. 10, 2004. | ||
| Prior Publication US 2009/0097525 A1, Apr. 16, 2009 | ||
| Int. Cl. G01K 13/02 (2006.01) | ||
| U.S. Cl. 374—144 [374/29; 374/135; 73/23.25] | 14 Claims |
| 1. A gas mixture temperature estimation method for an internal combustion, the method comprising:
estimating a temperature of a gas mixture produced through mixing of fuel injected into a combustion chamber of the internal
combustion engine and a cylinder interior gas, which is a gas having been taken into the combustion chamber,
wherein:
when the gas mixture does not stagnate, a heat transfer does not occur between the gas mixture and an object or substance
existing around the gas mixture and the temperature of the gas mixture is calculated based on a quantity of a heat of the
fuel injected into the combustion chamber and a quantity of a heat of the cylinder interior gas, and
when the gas mixture stagnates in a generally annular configuration in the vicinity of a side wall of the combustion chamber,
the heat transfer occurs between the gas mixture and the object or substance existing around the gas mixture during a period
in which the gas mixture stagnates and the temperature of the gas mixture is calculated based on the quantity of the heat
of the fuel injected into the combustion chamber, the quantity of the heat of the cylinder interior gas, and a quantity of
a heat transferred between the gas mixture and the object or substance existing around the gas mixture.
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