Control device for oil pump
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNobuyuki Murakami, Hisashi Ono, Yuki Nishida
Life of this patent
Estimating the term…
Abstract
A control device for a variable-capacity oil pump provided in an engine using alcohol-containing fuel includes an electronic control unit. The electronic control unit is configured to: (i) estimate an alcohol concentration in oil of the engine, and (ii) correct a capacity of the oil pump to be increased in a correction condition as compared with a case where the correction condition is not established when the correction condition is established. The correction condition is that an estimated alcohol concentration is a predetermined concentration or more and a temperature of the oil is a predetermined temperature or more.
Claims14
A control device for a variable-capacity oil pump provided in an engine using alcohol-containing fuel, the control device comprising:
- an electronic control unit configured to:
- (i) estimate an alcohol concentration in oil of the engine by comparing an oil temperature of the engine, a fuel injection amount of the engine, and an amount of change in the alcohol concentration in the oil per one burning cycle or one revolution to an alcohol concentration estimation map stored in a memory of the electronic control unit, and
- (ii) correct a capacity of the oil pump to be increased when a correction condition is established, as compared with a case where the correction condition being a condition that the estimated alcohol concentration in oil is a predetermined concentration or more and a temperature of the oil at a low pressure portion of the oil pump is a predetermined temperature or more.
Dependencies are inferred from the claim text.