Engine lubrication system
An engine lubrication system including: an oil pump configured to be driven by an engine; an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston; and circuitry configured to set a target hydraulic pressure of the oil injected from the oil jet mechanism according to an operation state of the engine; determine a hydraulic pressure state of the oil injected from the oil jet mechanism; and change a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition between the determined hydraulic pressure state and the target hydraulic pressure is satisfied.
1. An engine lubrication system comprising:
an oil pump configured to be driven by an engine;
an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston of the engine; and
circuitry configured to
set a target hydraulic pressure of the oil injected from the oil jet mechanism according to an operation state of the engine;
determine a hydraulic pressure state of the oil injected from the oil jet mechanism; and
change a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition is satisfied, wherein the predetermined condition includes the determined hydraulic pressure being below the target hydraulic pressure.
2. The engine lubrication system of claim 1 , further comprising:
the automatic transmission.
3. The engine lubrication system of claim 1 , further comprising:
one or more sensors configured to detect the hydraulic pressure of the oil injected from the oil jet mechanism.
4. The engine lubrication system of claim 3 , wherein
the predetermined condition is satisfied in a case that a deviation between the detected hydraulic pressure and the target hydraulic pressure is equal to or larger than a threshold value for a predetermined period of time.
5. The engine lubrication system of claim 1 , further comprising:
a sensor configured to detect a temperature of the oil injected from the oil jet mechanism.
6. The engine lubrication system of claim 5 , wherein
the circuitry is configured to perform control to return the gear stage, which has been changed to the lower gear stage, to a higher gear stage in a case that the detected oil temperature is equal to or higher than a set temperature.
7. The engine lubrication system of claim 5 , wherein
the predetermined condition includes the detected oil temperature being less than the set temperature.
8. The engine lubrication system of claim 1 , further comprising:
a gear shift map used for setting a gear stage of the automatic transmission based on one of plural gear shift lines defined with a vehicle speed and a load as parameters.
9. The engine lubrication system of claim 8 , wherein the circuitry is configured to control shifting at least one gear shift line of the plural gear shift lines to a higher speed in a case that the predetermined condition is satisfied.
10. The engine lubrication system according to claim 8 , wherein
the circuitry is configured to control shifting the gear shift line for a highest gear stage among the plural gear shift lines to a higher speed in a case that the predetermined condition is satisfied.
11. The engine lubrication system of claim 1 , further comprising:
one or more sensors configured to detect an oil temperature of the automatic transmission.
12. The engine lubrication system of claim 11 , wherein
the circuitry is configured to perform control to return the gear stage, which has been changed to the lower gear stage, to the original gear stage in a case that the detected oil temperature of the automatic transmission is equal to or higher than an automatic transmission set temperature.
13. The engine lubrication system according to claim 11 , wherein
the circuitry is configured to perform control to reduce engine output in a case that the detected oil temperature is equal to or higher than an automatic transmission set temperature.
14. A vehicle comprising:
an engine;
an automatic transmission;
an oil pump configured to be driven by the engine;
an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston; and
circuitry configured to
determine a target hydraulic pressure of the oil injected from the oil jet mechanism based on an operation state of the engine;
detect a hydraulic pressure of the oil injected from the oil jet mechanism; and
change a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition is satisfied, wherein the predetermined condition included the determined hydraulic pressure being below the target hydraulic pressure.
15. The vehicle of claim 14 , wherein
the predetermined condition is satisfied in a case that a deviation between the detected hydraulic pressure and the target hydraulic pressure is equal to or larger than a threshold value for a predetermined period of time.
16. A method performed by an engine lubrication system including an oil pump configured to be drive by an engine, and an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston of the engine, the method comprising:
setting a target hydraulic pressure of the oil injected from the oil jet mechanism according to an operation state of the engine;
detecting a hydraulic pressure state of the oil injected from the oil jet mechanism; and
changing a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition is satisfied, wherein the predetermined condition includes the determined hydraulic pressure being below the target hydraulic pressure.
17. The method of claim 16 , wherein
the predetermined condition is satisfied in a case that a deviation between the detected hydraulic pressure and the target hydraulic pressure is equal to or larger than a threshold value for a predetermined period of time.