JPH1181962A - Lubricating circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a vehicle smoothly travel at an appropriate combustion efficiency by providing an auxiliary heat source for heating the lubricating oil for lead-out in a device, in which an engine, an oil cooler and an oil filter are connected to each other through a circulation passage and the lubricating oil is circulated by an oil pump. SOLUTION: At the time of starting an engine in a cold district, impellers 16 of an oil pump OP of a pump integrated heater 32 is turned in a pump housing 15 through a gear 18 to be driven by engine. With this operation, the lubricating oil in an oil pan is sucked through a strainer, and led into the pump integrated heater 32. A rotor 11 of a viscous heater VH is turned in a heat generating chamber 6, and the built-in silicon oil generates the heat with sharing so as to heat the lubricating oil. The heated lubricating oil is led out to pipes 33, 34. The lubricating oil is sufficiently heated immediately after starting engine, and supplied to lubricating parts such as a crank journal so as to improve the traveling performance of vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating circuit for lubricating a rotating part and a sliding part of an engine, and for circulating a lubricating oil in order to prevent abrasion and corrosion of the engine and to keep the combustion chamber airtight.

[0002]

2. Description of the Related Art In an engine of a general vehicle, an oil pan of the engine is connected to at least an oil cooler and an oil filter by a circulation path such as a pipe and an oil hole. This allows the internal lubricating oil to circulate. Therefore, the lubricating oil sucked up by the oil pump from the oil pan is cooled by the oil cooler, and then the abrasion powder and the like are filtered by the oil filter, and the lubricating oil is supplied from the main oil hole to the lubrication of the rotating parts of the engine. . The lubricating oil after lubrication or the like is returned to the oil pan.

[0003]

However, the engine is
If it is cooled, even if it is heated by its own heat, before it is heated to some extent by its own heat, it is difficult to perform suitable combustion, and there may be problems with combustion efficiency and exhaust gas.
In this regard, in the above-described general lubrication circuit, the warm-up of the engine is left only to the heat generated by the engine, so that the vehicle cannot be quickly driven in a cold region or the like with suitable combustion efficiency. Such a tendency is a bigger problem under recent high performance engines in which heat generation of the engine is suppressed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object of the present invention to provide a lubricating circuit capable of promptly running a vehicle with favorable combustion efficiency. I do.

[0005]

A lubricating circuit according to the present invention includes an engine having an oil pan, an oil cooler, and an oil filter, which are connected by a circulating path, and the internal lubricating oil is supplied by an oil pump. The lubricating circuit circulating between these is provided with an auxiliary heat source for introducing the lubricating oil and heating and extracting the lubricating oil.

In this lubrication circuit, the warming-up of the engine is entrusted not only to the heat generation of the engine, but also to the heating of the lubricating oil by the auxiliary heat source. Can be run. Preferably, the circulation path has a bypass on the downstream side of the auxiliary heat source to avoid the oil cooler, and the bypass is preferably opened and closed by a thermostat.

In this case, when the engine is cold, the thermostat opens the bypass and the lubricating oil heated by the auxiliary heat source is not cooled by the oil cooler. In this case, the heat of the lubricating oil can be effectively used for warming up the engine and eventually for heating the vehicle compartment by the coolant circulating in the water jacket of the engine.

The auxiliary heat source has a housing inside which a heat generating chamber and a heat radiating chamber adjacent to the heat generating chamber for circulating a circulating fluid are formed, and a drive shaft rotatably supported by the housing via a bearing device. A rotor provided rotatably by the drive shaft in the heating chamber, and a liquid-tight gap between a wall surface of the heating chamber and an outer surface of the rotor, which is sheared by the rotation of the rotor to generate heat. And a heat generator having a viscous fluid.

The circulating fluid circulating in the heat radiating chamber of the heat generator may be a secondary medium such as a coolant. However, when the circulating fluid is a secondary medium, heat exchange from the secondary medium to lubricating oil is performed. At times, heat loss easily occurs, and a structure for heat exchange from the secondary medium to the lubricating oil is required, which complicates the structure.
For this reason, it is preferable that the circulating fluid circulating in the heat radiating chamber of the heat generator is lubricating oil. In this case, since the heat generator directly heats the lubricating oil, heat loss does not occur, and the operation and effect of the present invention are easily produced. In addition, in this case, the structure can be simplified and the manufacturing cost can be reduced.

On the other hand, the heat radiating chamber of the heat generator is divided into a first heat radiating chamber and a second heat radiating chamber, wherein the first heat radiating chamber circulates a coolant and the second heat radiating chamber circulates a lubricating oil. It is also preferred that it is done. In this case, the heat generator can directly heat the lubricating oil in the second heat radiating chamber, and can also directly heat the coolant for heating the vehicle compartment in the first heat radiating chamber.

Further, the viscous fluid of the heat generator can be lubricating oil. In this case, since the heat generator can heat the lubricating oil more directly by shearing, it is possible to further prevent heat loss and to simplify the structure. It is preferable that at least one of the housing and the drive shaft is a common component between the heat generator and the oil pump. If the housing is a common part, an external pipe or the like is not required, so that cost reduction can be realized by reducing the number of parts, and mounting on a vehicle is facilitated. Further, if the drive shaft is a common part, the heat generator and the oil pump can be driven by one gear, so that the cost can be reduced by reducing the number of parts, and the mounting on the vehicle becomes easy.

Preferably, the heat generator is of the variable capacity type. In this case, since the degree of heating of the lubricating oil can be changed, the lubricating oil can be heated as needed. Further, if cooling of the lubricating oil, viscous fluid, or circulating fluid becomes necessary, the heating and heat generation thereof can be stopped.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings. (Embodiment 1) This lubrication circuit is provided inside an engine. In this circulation circuit, as shown in FIG. 1, an oil strainer 31 is placed in an oil pan 30 in which lubricating oil is stored.
The oil strainer 31 is connected to a pump integrated heater 32 by a pipe (not shown).

As shown in FIGS. 2 and 3, the pump-integrated heater 32 has an oil pump OP and a variable-capacity viscous heater VH as a heat generator serving as an auxiliary heat source, which are integrally assembled. . Here, the pump integrated heater 3
In FIG. 2, as shown in FIG. 2, a front housing body 1, a front plate 2, a rear plate 3, and a rear housing body 4 are respectively stacked, and these are each interposed between each other by a plurality of bolts 5 via an O-ring. Has been concluded. A circular concave portion is formed in the rear surface of the front plate 2, and the concave portion forms a heat generating chamber 6 with the front surface of the rear plate 3. As shown in FIG. 3, a silicone oil SO as a viscous fluid to be described later is provided on the bottom surface of the concave portion of the front plate 2.
The groove 2a for enhancing the shearing effect and improving the heat transfer area is radially recessed. The front surface of the rear plate 3 forming the heat generating chamber 6 is similar, though not shown.

Further, as shown in FIG.
A plurality of arc-shaped fins 2b protrude forward in the axial direction on the front surface of the front housing, and the front housing body 1 and the fins 2b form a front oil jacket FO as a front heat radiation chamber. A plurality of arc-shaped fins 3b are also provided on the rear surface of the rear plate 3 so as to protrude rearward in the axial direction, and the rear housing body 4 and the fins 3b form a rear oil jacket RO as a rear heat radiation chamber. The lubricating oil flows along the fins 2b, 3b, and the fins 2b, 3b improve the heat receiving area at that time.

The shaft holes of the front plate 2 and the rear plate 3 are provided with bearings 7 and 8 with a built-in shaft sealing device. Are rotatably supported. A rotor 11 is press-fitted into the drive shaft 10 and located between the bearing devices 7 and 8 and rotatable within the heat generating chamber 6. The rotor 11 has a disk shape, and has a plurality of slits 11a for enhancing the shearing effect of the silicone oil SO and transferring the silicone oil SO in the heat generating chamber 6 to the outer peripheral region. In the center area of the rotor 11, a plurality of communication holes 11b penetrating back and forth are formed.

As shown in FIG. 3, the front plate 2 swells from the horizontal portion to the lower portion of the rotor 11, and an arc-shaped storage chamber SR is formed from the horizontal portion to the lower portion. The liquid oil gap between the heat generating chamber 6 and the rotor 11 and the storage chamber SR contain 40 to 70 vol of silicone oil SO.
% Filling. The front plate 2 is provided with a supply hole 2c that connects the bottom of the storage chamber SR and the heat generation chamber 6 in a tangential direction of the rotor 11, and the supply hole 2c is formed.
Is provided with a valve body 13 slidable horizontally via a pressing spring 12 having a biasing force in a direction to close the supply hole 2c. Behind the valve body 13, a lid member 14 having a suction port 14a
Is fixed by a circlip. A vacuum pump or an accumulator (not shown) is connected to the suction port 14a, and a room behind the valve body 13 can be pressurized or negatively pressured.

On the other hand, a recovery hole 2d is formed in the front plate 2 so as to extend from the heat generating chamber 6 in the radial direction of the rotor 11 and communicate with the gas phase of the storage chamber SR above the axis. The front plate 2 is provided with a collecting groove 2f which is inclined toward the front in the rotation direction R of the rotor 11 with respect to the radial direction of the rotor 11 and extends toward the collecting hole 2d. A convex portion 2e that guides the silicone oil SO in the recovery groove 2f to the recovery hole 2d is provided between the recovery groove 2f and the recovery hole 2d so as to project toward the heat generating chamber 6. Rear plate 3
A similar supply hole, recovery groove, and convex portion are also formed.

In the pump integrated heater 32 shown in FIG. 2, the pump chamber 15 is formed on the rear surface of the rear housing main body 4, and the rear housing main body 4 has a drive shaft via a bearing device 9 with a built-in shaft sealing device. 10 are supported. At the rear end of the drive shaft 10, an impeller 1 rotating in a pump chamber 15 is provided.
6 is fixed. The space between the bearing device 8 and the bearing device 9 is communicated with the atmosphere by an air hole 4a.

A gear 18 is rotatably provided on the boss of the front housing body 1 via a bearing device 17, and the gear 18 is fastened to the front end of the drive shaft 10 by splines and bolts 19. . The gear 18 is connected to a crankshaft or camshaft of the engine via a gear or a chain. The pump chamber 15 shown in FIG. 2 communicates with the downstream side of the oil strainer 31 shown in FIG. 1, and the lubricating oil pumped by the impeller 16 in the pump chamber 15 shown in FIG. The oil is transferred to the rear oil jacket RO by a communication hole (not shown). Rear oil jacket R
The lubricating oil in O is transferred to the front oil jacket FO through the communication hole 20 shown in FIG.
The internal lubricating oil is led out through the communication hole 21 to the pipe 33 shown in FIG. An oil cooler 35 is connected to the pipe 33.
Is connected to the downstream side. A thermostat three-way valve 36 is provided at a branch point between the pipes 33 and 34, and the thermostat three-way valve 36 allows lubricating oil derived from the communication hole 21 to flow into the pipe 34 according to its temperature. I have.

The pipes 33 and 34 are connected to an oil filter 37, and the lubricating oil passing through the oil filter 37 is led to a main oil hole 38. The lubricating oil passing through the main oil hole 38 is supplied to a crank journal. And the like, and are led out to a rotating part and a sliding part of the same 39. In the lubricating circuit configured as described above, if the engine is started in a cold region or the like, the gear 18 shown in FIG. 2 is driven, so that the impeller 16 in the oil pump OP of the pump integrated heater 32 To rotate. Therefore, lubricating oil is sucked up from the oil pan 30 shown in FIG. 1 via the oil strainer 31, and the lubricating oil is introduced into the pump integrated heater 32. FIG.
In the viscous heater VH of the integrated pump heater 32, the rotor 11 rotates in the heat generating chamber 6, so that the silicone oil SO generates heat by shearing in a liquid-tight gap between the wall surface of the heat generating chamber 6 and the outer surface of the rotor 11. During this time, the front and rear oil jackets FO, RO of the viscous heater VH
Since the lubricating oil is circulated, this heat is directly exchanged with the lubricating oil, and the heated lubricating oil is led out to the pipes 33 and 34 with little heat loss.

Shortly after the start, since the lubricating oil is still cold, the thermostat three-way valve 36 shown in FIG. 1 shuts off the path to the oil cooler 35 and opens the pipe 34. For this reason, the lubricating oil that has passed through the pump integrated heater 32 is transferred to the oil filter 37 through the pipe 34 so that the lubricating oil heated by the viscous heater VH is not cooled by the oil cooler 35. The lubricating oil thus heated is subjected to lubrication of a crank journal 39 and the like from a main oil hole 38 after abrasion powder and the like are filtered by an oil filter 37. Then, the lubricating oil after lubrication or the like is returned to the oil pan 30.

As described above, in this lubrication circuit, the engine is warmed up not only by the heat generation of the engine but also by the heating of the lubricating oil by the viscous heater VH of the pump integrated heater 32. The vehicle can be driven quickly with high combustion efficiency. Further, when the engine is warmed up, the coolant circulating in the water jacket of the engine is heated, and the vehicle compartment is quickly heated.

When the lubricating oil is warmed by the viscous heater VH and the waste heat of the engine, the thermostat valve 36 closes the pipe 34. Therefore, the pump integrated heater 32
The lubricating oil that has passed through only the pipe 33 passes through the oil cooler 35
After that, the abrasion powder and the like are filtered by the oil filter 37, and are supplied to the main oil hole 38 for lubrication of the crank journal 39 and the like. Then, the lubricating oil after lubrication or the like is returned to the oil pan 30. In addition, the coolant circulating in the water jacket of the engine is heated by the waste heat of the engine, and the vehicle compartment is effectively heated.

In the meantime, in the viscous heater VH, as shown in FIG.
Air is sucked from 4a, and the room behind the valve body 13 is set to a negative pressure. As a result, since the valve 13 opens the supply hole 2c, the silicone oil SO in the storage chamber SR is supplied to the heat generating chamber 6 through the supply hole 2c. On the other hand, the silicone oil SO in the heat generating chamber 6 is recovered in the storage chamber SR via the recovery groove 2f, the convex portion 2e, and the recovery hole 2d. For this reason, since the same silicone oil SO is not always sheared, thermal and mechanical deterioration of the silicone oil SO is prevented.

When the heating of the lubricating oil by the viscous heater VH becomes unnecessary, in the viscous heater VH, the accumulator sends air into the suction port 14a of the lid member 14 to pressurize the room behind the valve body 13. . This allows
Since the valve 13 closes the supply hole 2c, the silicone oil SO in the storage chamber SR is not supplied to the heat generating chamber 6.
On the other hand, the silicone oil SO in the heating chamber 6 is continuously collected in the storage chamber SR. For this reason, the silicone oil SO hardly remains in the heat generating chamber 6, the drive torque is reduced, and the heating of the lubricating oil is stopped.

In this circulation circuit, the front and rear oil jackets FO and RO of the viscous heater VH of the pump integrated heater 32 are lubricated as shown in FIG. Since the oil is circulated, the structure is simplified and the production cost is reduced. Further, in this circulation circuit, since the pump integrated heater 32 uses the rear housing main body 4 and the drive shaft 10 as common parts for the viscous heater VH and the oil pump OP, external pipes and the like are not required and one gear is provided. Since the viscous heater VH and the oil pump OP are driven at 18, the cost can be reduced by reducing the number of parts, and the mounting on the vehicle is easy.

(Embodiment 2) In this lubrication circuit, as shown in FIG. 4, the rear housing main body 40 has no partition for partitioning the rear oil jacket RO, and the rear housing main body 40 is connected to the rear oil jacket RO and the pump chamber 40a. Is united. The pump chamber 40a is an oil strainer 3
The lubricating oil which is communicated with the downstream side of the pump chamber 1 by the impeller 16 in the pump chamber 40a is led to the pipes 33 and 34 from the rear oil jacket RO.

Further, a front water jacket FW is formed by the front housing body 1 and the front plate 2, and the front water jacket FW includes hoses 42 and 43.
Thus, the coolant is connected to a water jacket, a heater core, and the like (not shown) of the engine, and the coolant is circulated therein. Other configurations are the same as in the first embodiment.

In the lubrication circuit configured as described above, the viscous heater VH of the pump integrated heater 32 directly heats the lubricating oil in the rear oil jacket RO, and the front water jacket FW for heating the vehicle compartment. The coolant can also be heated directly. Other functions and effects are the same as those of the first embodiment.

(Embodiment 3) In this lubrication circuit, as shown in FIG. 5, the viscous fluid of the viscous heater VH is used as lubricating oil. That is, the heating chamber 6 of the rear housing body 41
A recovery hole 41a that communicates between the pump chamber 41a and the outer peripheral area of the heat generating chamber 6 is formed through the partition wall that forms. At the rear end of the drive shaft 10, a supply hole 10a for supplying lubricating oil from the back of the impeller 16 to the inner peripheral area of the heat generating chamber 6 is provided. In this way, the rear housing body 41 integrates the heat generating chamber 6 and the pump chamber 41a without using the rear plate.

The pump chamber 41a communicates with the downstream side of the oil strainer 31, and is heated by shearing in the heat generating chamber 6 integrated with the pump chamber 41a.
The lubricating oil pumped by the impeller 16 inside the pipe 3
3, 34. Further, a front water jacket FW is formed by the front housing body 1 and the front plate 2, and the front water jacket FW is connected to a water jacket, a heater core (not shown) of the engine, and the like by hoses 42 and 43. Coolant is circulated.

The other structure is the same as that of the first embodiment. In the lubricating circuit configured as described above, the pump integrated heater 3
Since the second viscous heater VH shears the lubricating oil and heats it more directly, further prevention of heat loss and simplification of the structure can be realized. Other functions and effects are the same as those of the first and second embodiments.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a lubrication circuit according to a first embodiment.

FIG. 2 is a longitudinal sectional view of the pump-integrated heater according to the first embodiment.

FIG. 3 is a cross-sectional view of the pump-integrated heater according to the first embodiment.

FIG. 4 is a longitudinal sectional view of a pump-integrated heater according to the second embodiment.

FIG. 5 is a longitudinal sectional view of a pump-integrated heater according to the third embodiment.

[Explanation of symbols]

Reference Signs List 30 oil pan 35 oil cooler 37 oil filter 33, 34 circulation path (pipe (34 bypass path)) 32 heater integrated with pump (VH auxiliary heat source (viscus heater), OP oil pump) 36 thermostat 1, 2, 3, 4, 40, 41 ... housing (1 ... front housing body, 2 ... front plate, 3 ... rear plate,
4, 40, 41: rear housing main body) 6: heat generating chamber FO, RO, FW: heat radiation chamber (FO: front oil jacket, RO: rear oil jacket, FW: front water jacket) 7, 8, 9: bearing Apparatus 10: Drive shaft 11: Rotor

Claims (8)

[Claims] 1. A lubrication circuit having an engine having an oil pan, an oil cooler, and an oil filter, which are connected by a circulation path and circulates an internal lubricating oil between them by an oil pump. A lubricating circuit comprising an auxiliary heat source for introducing lubricating oil and heating and extracting the lubricating oil. 2. The lubrication system according to claim 1, wherein the circulation path has a bypass on the downstream side of the auxiliary heat source to avoid the oil cooler, and the bypass can be opened and closed by a thermostat. circuit. 3. The auxiliary heat source includes a housing that forms a heat-generating chamber and a heat-radiating chamber that circulates a circulating fluid adjacent to the heat-generating chamber, and a drive that is rotatably supported by the housing via a bearing device. A shaft, a rotor rotatably provided by the drive shaft in the heating chamber, and a liquid-tight gap between a wall surface of the heating chamber and an outer surface of the rotor, which is sheared by the rotation of the rotor. The lubricating circuit according to claim 1, wherein the lubricating circuit is a heat generator having a viscous fluid that generates heat. 4. The lubricating circuit according to claim 3, wherein the circulating fluid of the heat generator is the lubricating oil. 5. A heat radiating chamber of the heat generator comprises a first radiating chamber and a second radiating chamber.
The lubrication circuit according to claim 3, wherein the lubrication circuit is divided into a heat radiation chamber, the first heat radiation chamber circulates a coolant, and the second heat radiation chamber is configured to circulate the lubricating oil. 6. The lubrication circuit according to claim 3, wherein the viscous fluid of the heat generator is the lubricating oil. 7. The lubricating circuit according to claim 3, wherein at least one of the housing and the drive shaft is a common part between the heat generator and the oil pump. 8. The lubrication circuit according to claim 3, wherein the heat generator is of a variable capacity type.