Engine oil state control device
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsTakayuki Yamamoto, Takuya Kumagai, Tomohide Yamada, Kazuki Nishizawa
Life of this patent
Estimating the term…
Abstract
An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed includes comprising a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio, and an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold.
Claims18
An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed, comprising:
- a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio,
- an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold;
- and
- an output decrease control part configured to perform an output decrease control for decreasing an output power of the engine compared to an output power when the predetermined combustion control is performed, if the fuel mixture ratio is equal to or greater than a second threshold, the second threshold being greater than the first threshold,
- wherein the oil temperature rise control includes a control for increasing a fuel injection amount during an idling, only if th e fuel mixture ratio is equal to or greater than the first threshold and less than the second threshold, by increasing a set value of an idling speed of the engine so that an amount of heat due to combustion of the fuel during the idling is increased.
An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine
- on which a predetermined combustion control is performed, comprising:
- a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio;
- and
- an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold,
- wherein the oil temperature rise control includes a combustion temperature rise control for increasing a combustion temperature in a cylinder of the engine compared to a combustion temperature in the cylinder when the predetermined combustion control is performed,
- wherein the combustion temperature rise control includes at least one of a control for decreasing an air excess ratio of the engine compared to an air excess ratio determined in accordance with the predetermined combustion control, or a control for increasing an EGR rate of the engine compared to an EGR rate determined in accordance with the predetermined combustion control.
An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed, comprising:
- a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio;
- and
- an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold,
- an output decrease control part configured to perform an output decrease control for decreasing an output power of the engine compared to an output power when the predetermined combustion control is performed, if the fuel mixture ratio is equal to or greater than a second threshold and less than a third threshold, wherein the second threshold is greater than the first threshold.
Dependencies are inferred from the claim text.