Lubricating oil supplying system for internal combustion engine
First Claim
1. A lubricating oil supplying system for an internal combustion engine, comprising:
- a lubricating oil storage section for storing lubricating oil;
a driven pump driven by the internal combustion engine to suck the lubricating oil from said lubricating oil storage section and discharge the lubricating oil to a discharge passage;
an electric pump for sucking the lubricating oil discharged from said driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine;
a controlling mechanism for drivingly controlling said electric pump in accordance with a control signal;
a bypass passage for bypassing said driven pump; and
a check valve disposed in said bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing said driven pump and toward side of the discharge passage
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Accused Products
Abstract
A lubricating oil supplying system for an internal combustion engine includes a lubricating oil storage section for storing lubricating oil. A driven pump is driven by the internal combustion engine to suck the lubricating oil from the lubricating oil storage section and discharge the lubricating oil to a discharge passage. An electric pump is provided for sucking the lubricating oil discharged from the driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine. A controlling mechanism is provided for drivingly controlling the electric pump in accordance with a control signal. A bypass passage is provided for bypassing the driven pump. A check valve is disposed in the bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing said driven pump and toward side of the discharge passage.
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Citations
20 Claims
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1. A lubricating oil supplying system for an internal combustion engine, comprising:
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a lubricating oil storage section for storing lubricating oil;
a driven pump driven by the internal combustion engine to suck the lubricating oil from said lubricating oil storage section and discharge the lubricating oil to a discharge passage;
an electric pump for sucking the lubricating oil discharged from said driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine;
a controlling mechanism for drivingly controlling said electric pump in accordance with a control signal;
a bypass passage for bypassing said driven pump; and
a check valve disposed in said bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing said driven pump and toward side of the discharge passage - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A fluid pump comprising:
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a pump mechanism for sucking fluid from a storage section and discharging the fluid to a discharge section;
a plunger valve body having a pressure receiving section which is formed at one end side of said plunger valve body and opens to the discharge section, the plunger valve body being movable to release a part of fluid discharged from said pump mechanism to the discharge section to a low pressure section;
a section defining a low pressure chamber formed at the other end side of said plunger valve body and in communication with the low pressure section;
a biasing member disposed in the low pressure chamber to bias said plunger valve body in one direction; and
a check valve disposed in the pressure receiving section of said plunger valve body to allow the lubricating oil to flow through a path from said lower pressure chamber to the discharge section. - View Dependent Claims (17, 18, 19)
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20. A lubricating oil supplying system for an internal combustion engine, comprising:
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a lubricating oil storage section for storing lubricating oil;
a first pump for sucking the lubricating oil from said lubricating oil storage section and discharging the lubricating oil to a discharge passage;
a second pump for sucking the lubricating oil discharged from said first pump to the discharge passage and discharging the lubricating oil to a lubricating oil requiring section in the internal combustion engine;
a bypass passage for bypassing said first pump; and
an opening and closing mechanism disposed in said bypass passage to open said bypass passage when an amount of the lubricating oil discharged from said first pump exceeds that from said second pump, and to cutoff said bypass passage when the amount of the lubricating oil discharged from said first pump is similar to that from said second pump or when the amount of the lubricating oil discharged from said second pump is lower than that from said first pump.
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Specification