Lubricating oil supplying device
First Claim
1. A lubricating oil supply device for supplying lubricating oil to an engine from an oil tank by a pump, said device comprising a spool valve and a solenoid for operating said valve, said spool valve comprising:
- a valve body having an open longitudinal space, plural, spaced inlet passages extending radially from first ends opening into said longitudinal space and second ends connected to a discharge side of the pump, and at least one outlet passage having one end connected to at least one inlet passage and a second end connected to the engine for feeding the lubricating oil thereto;
a return passage for returning oil from said spool valve to the pump; and
a spool member reciprocably mounted in said longitudinal space for reciprocating movement relative to the valve body between open and closed positions, under control of said solenoid, said spool member having communication passages respectively connecting said inlet passages with said return passage.
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Accused Products
Abstract
A lubricating oil supplying device allows for the oil discharge amount to be more finely controlled by provision of many outlet ports, and by reducing the influence of vibration. Therefore, a spool valve unit and a pump are separately formed. The spool valve unit includes an open-close spool valve and a solenoid for controlling operation of this spool valve. Plural inlet passages and an outlet passage are formed in the spool valve. The spool valve opens or closes the inlet passages, and oil from the pump is introduced into these inlet passages. One side of the outlet passage communicates with the inlet passages, and the other side communicates with an engine. A passage for introducing the oil from an oil tank to a pump chamber is formed in the solenoid. When the solenoid is turned “OFF”, communication between the return passage and the inlet passages is interrupted by the spool valve, and the oil is discharged from the pump to the plural inlet passages. The oil is discharged from the inlet passages to the engine via a check valve. When the solenoid is turned “ON”, the return passage communicates with the inlet passages through the spool valve, and the oil is returned to the pump via the return passage.
14 Citations
12 Claims
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1. A lubricating oil supply device for supplying lubricating oil to an engine from an oil tank by a pump, said device comprising a spool valve and a solenoid for operating said valve, said spool valve comprising:
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a valve body having an open longitudinal space, plural, spaced inlet passages extending radially from first ends opening into said longitudinal space and second ends connected to a discharge side of the pump, and at least one outlet passage having one end connected to at least one inlet passage and a second end connected to the engine for feeding the lubricating oil thereto;
a return passage for returning oil from said spool valve to the pump; and
a spool member reciprocably mounted in said longitudinal space for reciprocating movement relative to the valve body between open and closed positions, under control of said solenoid, said spool member having communication passages respectively connecting said inlet passages with said return passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification