Dry sump engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakahiro Higashi, Yuya Horii, Motohiro Yuge, Hirotaka Takeuchi
Life of this patent
Estimating the term…
Abstract
A dry sump engine having a simple structure to certainly prevent a pressure rise in an oil tank. In the dry sump engine, a solenoid valve is arranged between the oil tank and a gas receiving section. A controller comprises: a low-pressure determiner that determines whether a pressure in the oil tank is lower than a first reference pressure level; a condition determiner that determines a satisfaction of a predetermined condition; and an open controller that opens the solenoid valve when the internal pressure of the oil tank is lower than the first reference pressure level, or when the predetermined condition is satisfied.
Claims12
A dry sump engine, comprising:
- an oil tank holding a lubricating oil and a blow-by gas delivered from a crankcase or an oil pan by a pump;
- a pipeline for delivering the blow-by gas from the oil tank to an intake section;
- a PCV valve arranged on the pipeline that is opened when a pressure in the oil tank is raised higher than a pressure in the intake section;
- a gas receiving section that receives the blow-by gas without leakage;
- an another valve that is arranged between the oil tank and the gas receiving section;
- and
- a controller that controls the another valve,
- wherein the controller comprises
- a low-pressure determiner that is configured to determine whether an internal pressure of the oil tank is lower than a first reference pressure level,
- a condition determiner that is configured to determine a satisfaction of a predetermined condition other than the condition in which the internal pressure of the oil tank is lower than the first reference pressure level, and
- an open controller that is configured to open the another valve when the low-pressure determiner determines that the internal pressure of the oil tank is lower than the first reference pressure level, or when the condition determiner determines that the predetermined condition is satisfied.
Dependencies are inferred from the claim text.