A protection controller of a power unit

Japanese Patent JP5951287

B2

PROBLEM TO BE SOLVED: To definitely suppress overheating of a power unit comprising an engine and an automatic transmission.SOLUTION: When a temperature of a power unit P exceeds a specific value, a generated heat calculation unit M2 and a released heat calculation unit M3 calculate an amount of heat generation and an amount of heat release of the power unit P respectively. A rotation rate calculation unit M4 calculates a rotation rate of an engine at which the amount of heat generation exceeds the amount of heat release, and a change gear ratio determination unit M5 determines a change gear ratio of an automatic transmission T which can hold the rotation rate of the engine. While a change gear control unit M6 shifts the speed of the automatic transmission T to the described change gear ratio, the temperature of the power unit P holds the change gear ratio until the temperature of the power unit P becomes a specific value, and then the overheat of the power unit P is definitely suppressed and the operation force of the power unit P is ensured at a maximum. Additionally, the need of a large size radiator and an oil cooler are eliminated, thereby preventing increases in the cost, weight and size.

Takashi Aoki
Katsunao Tanaka
Hiroshi Sada

JP2012046374A

July 13, 2016

March 02, 2012

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Honda motor industry stock company

F16H61/18; F16H61/12

JP62286847A
JP2011201370A
JP11270669A
JP2000179670A
JP2010149629A
JP2008189243A
JP10205616A

Ken Ochiai
Kazuaki Niki
Nude Shima Shinji

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