Engine lubrication system
AssigneeMazda Motor Corporation
InventorsKenta Honda, Masanori Hashimoto, Daisuke Fukuda, Atsushi Yamada, Daisuke Shimo
Life of this patent
Estimating the term…
Abstract
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.
Claims17
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.
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.
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.
Dependencies are inferred from the claim text.