Control apparatus for dry sump type internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakao Suzuki, Hidenori Usui
Life of this patent
Estimating the term…
Abstract
A feed pump 28 that is driven by the axial torque of an internal combustion engine 10 is installed. An electric scavenge pump 36 is installed. A base value for the ratio (S/F ratio) between the discharge volume of the scavenge pump 36 and feed pump 28 is calculated. The base value is corrected so that the S/F ratio is lower in a region where the engine speed is high than in a region where the engine speed is low. The discharge volume of the scavenge pump 36 is controlled in accordance with the S/F ratio that is corrected in the above manner.
Claims6
A control apparatus for a dry sump type internal combustion engine, which includes a feed pump whose discharge volume varies with an engine speed and a scavenge pump whose discharge volume can be changed without depending on the engine speed, the control apparatus comprising:
- a pump control device for controlling said scavenge pump in such a manner that a discharge volume ratio between the discharge volume of said scavenge pump and the discharge volume of said feed pump in a region within which the engine speed is high is lower than the discharge volume ratio in a region within which the engine speed is low.
A control apparatus for a dry sump type internal combustion engine, which includes a feed pump whose rotation speed varies with an engine speed and a scavenge pump whose rotation speed can be changed without depending on the engine speed, the control apparatus comprising:
- a pump control device for controlling said scavenge pump in such a manner that a rotation speed ratio between the rotation speed of said scavenge pump and the rotation speed of said feed pump in a region within which the engine speed is high is lower than the rotation speed ratio in a region within which the engine speed is low.
Dependencies are inferred from the claim text.