JP2009115266A - Oil lubricating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil lubricating device capable of stably supplying oil to a lubricating part. <P>SOLUTION: This oil lubricating device 1-1 has a jet pump 5 with a delivery oil passage 53 connected to the lubricating part 200, and supplies the oil to the lubricating part 200 from the jet pump 5. A high pressure oil passage 52 of the jet pump 5 is connected to a constant pressure circuit 42 supplying the oil of constant pressure to a hydraulic operation mechanism out of a hydraulic control circuit 4 supplying the oil to the hydraulic operation mechanism (such as a torque converter 10) operating the oil pressurized by an oil pump 3 by hydraulic pressure, and the oil of adjusting pressure to the constant pressure by the constant pressure circuit 42, is supplied as oil of higher pressure than the oil in a suction oil passage 51 of the jet pump 5. Thus, a delivery flow rate of the jet pump 5 can be set constant. Thus, a lubricating flow rate of the oil supplied to the lubricating part 200 can be set constant, and the oil can be stably supplied to the lubricating part 200. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oil lubrication device that supplies oil to a lubrication portion, and more particularly to an oil lubrication device that includes a jet pump in which a discharge oil passage is connected to the lubrication portion.

  A transmission that transmits driving torque of an internal combustion engine mounted on a vehicle to wheels has a lubrication portion that requires oil lubrication. The transmission is provided with an oil lubrication device that supplies oil to the lubrication part. Some conventional oil lubrication devices include a jet pump as disclosed in Patent Document 1, for example. The jet pump is composed of a suction oil passage, a high-pressure oil passage, and a discharge oil passage. By discharging the oil in the high-pressure oil passage that is higher in pressure than the oil in the suction oil passage, the suction oil passage The oil of the road is discharged to the discharge oil path together with the oil of the high pressure oil path. Therefore, the jet pump can discharge a large amount of oil to the discharge oil passage with a small amount of high-pressure oil, and has a function of increasing the oil flow rate. In the oil lubrication apparatus shown in Patent Document 1, the discharge oil passage of the jet pump is connected to the lubrication portion, and the oil in the discharge oil passage is supplied to the lubrication portion.

JP-A-8-219267

  By the way, in the jet pump, the oil discharge flow rate changes according to the oil pressure of the oil in the high-pressure oil passage. In the jet pump, the oil discharge flow rate decreases as the oil pressure in the high-pressure oil passage decreases. In the jet pump, the oil discharge flow rate changes according to the viscosity of the oil. In the jet pump, when the viscosity of the oil flowing into the discharge oil passage from the high pressure oil passage and the suction oil passage is high, the discharge flow rate of the oil is remarkably reduced as compared with the case where the viscosity is low. Therefore, in the jet pump, when the oil temperature of the oil is low and the internal combustion engine is cold, the oil discharge flow rate is remarkably reduced as compared with the time when the oil is warm.

  Here, in the lubrication portion, an oil having a substantially constant flow rate (affected by the viscosity of the oil) is required as the required flow rate regardless of the operating state of the internal combustion engine or the transmission. If the oil supply to the lubrication part is more than the required flow rate, the oil agitation loss and the like increase and the friction of the transmission increases, resulting in a problem that efficiency is lowered. Further, if the oil supply to the lubrication part is less than the required flow rate, there is a problem that the lubrication part is insufficiently lubricated, the transmission friction increases, and the efficiency decreases. Furthermore, there is a problem that durability is lowered such as seizure of the lubricated portion. That is, if oil cannot be stably supplied to the lubrication part, there is a possibility that a problem occurs in lubrication in the lubrication part.

  The present invention has been made in view of the above, and an object of the present invention is to provide an oil lubrication apparatus capable of stably supplying oil to a lubrication portion.

  In order to solve the above-described problems and achieve the object, in the present invention, in an oil lubrication apparatus that includes a jet pump in which a discharge oil passage is connected to a lubrication portion, and supplies oil from the jet pump to the lubrication portion, The high-pressure oil passage of the jet pump is a constant pressure that supplies a constant pressure of oil to the hydraulic operating mechanism in a hydraulic control circuit that supplies oil to a hydraulic operating mechanism that hydraulically operates oil pressurized by the oil pump. It is connected to a circuit.

  According to the present invention, in the oil lubrication apparatus, the intake oil passage of the jet pump is connected to an oil return circuit that returns excess oil to the downstream side of the oil pump in the hydraulic control circuit. Features.

  According to the present invention, in the oil lubrication apparatus, a check valve that allows only the oil to flow from the oil return circuit side to the suction oil path side is provided between the suction oil path and the oil return circuit. It is characterized by being.

  According to the present invention, in the oil lubrication apparatus, the intake oil passage of the jet pump is connected to a lubrication circuit that supplies oil to the lubrication part in the hydraulic control circuit.

  According to the present invention, in the oil lubrication apparatus, a lubrication circuit that supplies oil to the lubrication portion of the hydraulic control circuit is connected between the discharge oil passage and the lubrication portion. Features.

  Further, in the present invention, in an oil lubrication apparatus that includes a jet pump in which a discharge oil passage is connected to a lubrication portion and supplies oil from the jet pump to the lubrication portion, the suction oil passage of the jet pump is added by an oil pump. Of the hydraulic control circuit that supplies oil to a hydraulic operation mechanism that operates the pressurized oil by hydraulic pressure, the hydraulic control circuit is connected to an oil return circuit that returns excess oil to the downstream side of the oil pump.

  According to the present invention, in the oil lubrication apparatus, a check valve that allows only the oil to flow from the oil return circuit side to the suction oil path side is provided between the suction oil path and the oil return circuit. It is characterized by being.

  Further, in the present invention, in an oil lubrication device that includes a jet pump in which a discharge oil passage is connected to a lubrication portion and supplies oil from the jet pump to the lubrication portion, the suction oil passage of the jet pump is provided by an oil pump. A hydraulic control circuit that supplies oil to a hydraulic operation mechanism that operates pressurized oil by hydraulic pressure is connected to a lubrication circuit that supplies oil to the lubrication portion.

  Further, in the present invention, in an oil lubrication device that includes a jet pump in which a discharge oil passage is connected to a lubrication portion, and supplies oil from the jet pump to the lubrication portion, the oil passage between the discharge oil passage and the lubrication portion is provided. Is characterized in that a lubricating circuit for supplying oil to the lubricating portion is connected in a hydraulic control circuit for supplying oil to a hydraulic operating mechanism that operates oil pressurized by an oil pump by hydraulic pressure.

  According to the present invention, in the oil lubrication apparatus, the oil pump is operated by a drive source capable of changing a rotation speed.

  In the oil lubrication device according to the present invention, when the oil temperature of the oil is low, the rotation speed of the oil pump is increased.

  In the present invention, the oil lubrication apparatus includes a plurality of the oil pumps, and the plurality of oil pumps are driven when the oil temperature of the oil is low.

  According to the present invention, the oil regulated to a constant pressure by the constant pressure circuit 42 is supplied to the high pressure oil passage as oil having a pressure higher than that in the suction oil passage of the jet pump. Therefore, the discharge flow rate of the jet pump 5 can be made constant. Thereby, the lubrication flow rate of the oil supplied to the lubrication part can be made constant, and the oil can be stably supplied to the lubrication part.

  According to the present invention, part of the oil filled in the discharge oil passage of the jet pump is surplus oil from the oil return circuit. Therefore, since the oil filled in the discharge oil passage of the jet pump passes through the hydraulic control circuit, the oil temperature is compared with the case where the oil is directly filled into the discharge oil passage of the jet pump from the oil tank storing the oil. Filled with high oil. Accordingly, when the internal combustion engine is cold, the viscosity of the oil increases, so that a decrease in the oil discharge flow rate by the jet pump can be suppressed. As a result, when the internal combustion engine is cold, a decrease in the lubricating flow rate of the oil supplied to the lubrication portion can be suppressed, and the oil can be stably supplied to the lubrication portion.

  Further, according to the present invention, since the check valve only allows oil to flow from the oil return circuit side to the suction oil passage side, the check valve prevents oil from flowing out to the oil return circuit side. Can do. Therefore, even if a reverse flow is generated by the jet pump, the reverse flow can be prevented.

  Further, according to the present invention, a part of the oil filled in the discharge oil passage of the jet pump is oil having a lubricating pressure from the lubricating circuit. Therefore, since the oil filled in the discharge oil passage of the jet pump passes through the hydraulic control circuit, the oil temperature is compared with the case where the oil is directly filled into the discharge oil passage of the jet pump from the oil tank storing the oil. Filled with high oil. Accordingly, when the internal combustion engine is cold, the viscosity of the oil increases, so that a decrease in the oil discharge flow rate by the jet pump can be suppressed. As a result, when the internal combustion engine is cold, a decrease in the lubricating flow rate of the oil supplied to the lubrication portion can be suppressed, and the oil can be stably supplied to the lubrication portion.

  Moreover, according to this invention, oil will be supplied to a lubrication part from a lubrication circuit. Therefore, when the internal combustion engine is cold, the viscosity of the oil increases, so that even if the oil discharge flow rate by the jet pump is reduced, the oil at the lubricating pressure can be directly supplied to the lubrication part. That is, when the internal combustion engine is cold, a decrease in the lubricating flow rate of the oil supplied to the lubrication portion can be suppressed, and the oil can be stably supplied to the lubrication portion 200.

  Further, according to the present invention, since the supply flow rate of the oil supplied to the pressure control circuit is increased when the oil temperature is low, that is, when the internal combustion engine is cold, the oil is filled from the lubricating oil passage to the intake oil passage of the jet pump. The supply flow rate of the oil adjusted to the lubrication pressure increases, or the supply flow rate of the oil adjusted to the lubrication pressure supplied directly from the lubrication oil passage to the lubrication portion without going through the jet pump increases. Therefore, when the internal combustion engine is cold, the oil viscosity increases, so even if the oil discharge flow rate by the jet pump decreases, the oil of lubricating pressure is lubricated through the jet pump or without the jet pump. Can be supplied to the part. That is, when the internal combustion engine is cold, it is possible to suppress a decrease in the lubricating flow rate of the oil supplied to the lubrication portion. As a result, when the internal combustion engine is cold, a decrease in the lubricating flow rate of the oil supplied to the lubrication portion can be suppressed, and the oil can be stably supplied to the lubrication portion.

  Further, according to the present invention, when the oil is at a low temperature, that is, when the internal combustion engine is cold, the plurality of oil pumps are driven to increase the supply flow rate of the oil supplied to the hydraulic control circuit. The supply flow rate of the oil adjusted to the lubricating pressure filled in the suction oil passage of the pump increases, or the oil adjusted to the lubricating pressure supplied directly from the lubricating oil passage to the lubricating portion without going through the jet pump. Supply flow increases. Therefore, when the internal combustion engine is cold, the oil viscosity increases, so even if the oil discharge flow rate by the jet pump decreases, the oil of lubricating pressure is lubricated through the jet pump or without the jet pump. Can be supplied to the part. That is, when the internal combustion engine is cold, it is possible to suppress a decrease in the lubricating flow rate of the oil supplied to the lubrication portion. As a result, when the internal combustion engine is cold, a decrease in the lubricating flow rate of the oil supplied to the lubrication portion can be suppressed, and the oil can be stably supplied to the lubrication portion.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. In the following embodiments, the oil lubrication device according to the present invention is an automatic transmission (such as a stepless transmission mechanism or a continuously variable transmission such as a belt type continuously variable transmission mechanism) mounted on a vehicle such as an automobile or a truck. Mechanism) and manual transmission, etc.

[Embodiment 1]
FIG. 1 is a diagram illustrating a configuration example of an oil lubrication apparatus according to the first embodiment. As shown in FIG. 1, the oil lubrication device 1-1 according to the first embodiment supplies oil to a lubrication portion 200 configured by a lubrication element that is required to be lubricated by oil of a transmission (not shown). The oil lubrication device 1-1 includes an oil tank 2, an oil pump 3, a hydraulic control circuit 4, and a jet pump 5. Here, 100 is an internal combustion engine. A torque converter 110 is connected to the internal combustion engine 100. Reference numeral 120 denotes a transmission ECU that controls driving of a transmission (not shown).

  The internal combustion engine 100 outputs drive torque for moving a vehicle (not shown) on which the internal combustion engine 100 is mounted forward or backward. Further, the internal combustion engine 100 is connected to an engine ECU (not shown), and the operation is controlled by the engine ECU to adjust the output drive torque. Drive torque from the internal combustion engine 100 is transmitted to a transmission (not shown). Drive torque from the internal combustion engine 100 is transmitted to the torque converter 110 via a crankshaft (not shown).

  The torque converter 110 is a hydraulic operation mechanism that operates by hydraulic pressure, and is a starting mechanism. The torque converter 110 has a lockup mechanism that can directly transmit the driving torque from the internal combustion engine 100 without using oil. The drive torque from the internal combustion engine 100 transmitted to the torque converter 110 is transmitted to the wheels via other transmission mechanisms (not shown) such as a forward / reverse switching mechanism, a transmission mechanism, a power transmission mechanism, a differential gear, and a drive shaft. The The torque converter 110 includes a pump 111, a turbine 112, a lockup clutch 113, a casing 114, a switching valve 115, and a switching solenoid 116. The torque converter 110 transmits the driving torque from the internal combustion engine 100 transmitted to the pump 111 to the other transmission mechanism (for example, forward / rearward travel) via oil that is a working fluid filled between the pump 111 and the turbine 112. It is transmitted to the turbine 112 connected to the switching mechanism. Further, the torque converter 110 is transmitted to the pump 111 without passing oil by engaging the lockup clutch 113 connected to the turbine 112 with the casing 114 that connects the pump 111 and a crankshaft (not shown). The driving torque is also transmitted directly to the turbine 112. Here, ON / OFF control for engaging / disengaging the lock-up clutch 113, that is, for turning the clutch ON or OFF, is performed by the switching valve 115.

  The switching valve 115 is a hydraulic operation mechanism that operates by hydraulic pressure. Although not shown, the switching valve 115 includes an oil passage that communicates with a plurality of ports, and a spool valve element that is movably supported in the oil passage. The spool valve element moves in the oil passage by a constant pressure supplied from the switching solenoid 116, and performs communication between a plurality of ports and blocking of the communication. The switching valve 115 is connected to a later-described high-pressure circuit 41 of the hydraulic control circuit 4 through a communication oil path L1. Therefore, high-pressure oil regulated by the high-pressure circuit 41 can be supplied to the switching valve 115. Further, the switching valve 115 is connected to a later-described suction oil passage 51 of the jet pump 5 through a communication oil passage L2 through a communication oil passage L11. Therefore, oil from the switching valve 115, that is, post-supply oil supplied to the torque converter 110 described later can be supplied to the intake oil passage 51 of the jet pump 5. The switching valve 115 is connected between the lockup clutch 113 of the torque converter 110 and the casing 114 by a communication oil path L3. Further, the switching valve 115 is connected between the pump 111 of the torque converter 110 and the lockup clutch 113 by a communication oil passage L4. Here, the switching valve 115 communicates the communication oil path L1 and the communication oil path L4 in the clutch ON state, and high-pressure oil is introduced between the pump 111 and the lockup clutch 113, and the communication oil path L2 The communication oil path L3 is communicated, and oil between the lockup clutch 113 and the casing 114 is introduced into the suction oil path 51, whereby the lockup clutch 113 is moved to the casing 114 side, and the lockup clutch 113 and Engage with the casing 114. In addition, the switching valve 115 communicates the communication oil path L1 and the communication oil path L3 in the clutch OFF state, and high-pressure oil is introduced between the lockup clutch 113 and the casing 114 to communicate with the communication oil path L2. The oil passage L4 is communicated, and oil between the pump 111 and the lockup clutch 113 is introduced into the intake oil passage 51, whereby the lockup clutch 113 is moved to the turbine 112 side, and the lockup clutch 113 and the casing are moved. 114 is disengaged.

  The switching solenoid 116 controls ON / OFF of the lockup clutch 113 by the switching valve 115 by controlling the supply of the constant pressure oil generated by the constant pressure circuit 42 described later of the hydraulic control circuit 4 to the switching valve 115. It is what you want to do. The switching solenoid 116 is connected to a constant pressure circuit 42 (to be described later) of the hydraulic control circuit 4 through a communication oil path L5. Accordingly, the switching solenoid 116 is supplied with oil having a constant pressure regulated by the constant pressure circuit 42. The switching solenoid 116 is connected to the switching valve 115 through a communication oil path L6. The switching solenoid 116 is connected to the transmission ECU 120, and the transmission ECU 120 controls the supply of constant pressure oil to the switching valve 115. When the clutch is turned on, the transmission ECU 120 supplies oil of a constant pressure supplied to the switching solenoid 116 to the switching valve 115, sets the switching valve 115 to the above-described clutch ON state, and engages the lockup clutch 113 and the casing 114. Match. When the transmission ECU 120 turns the clutch off, the transmission ECU 120 stops supplying the constant pressure oil supplied to the switching solenoid 116 to the switching valve 115, sets the switching valve 115 to the above-described clutch OFF state, and sets the lockup clutch 113 and the casing. 114 is disengaged.

  The oil tank 2 stores oil supplied to the lubrication portion 200, and a strainer 21 is provided inside.

  The oil pump 3 sucks oil stored in the oil tank 2 through the communication oil passage L7. The sucked oil is pressurized and discharged to the communication pipe L8 communicating with the discharge side. Here, the communication pipe L8 is connected to the hydraulic control circuit 4. Therefore, the oil pressurized by the oil pump 3 can be supplied to the hydraulic control circuit 4. Here, the oil pump 3 is provided between the torque converter 110 and a forward / reverse switching mechanism (not shown), and is driven to rotate when the torque converter 110 rotates. Accordingly, the discharge flow rate of the oil pump 3 changes as the internal combustion engine 100 rotates.

  The hydraulic control circuit 4 regulates the oil pressurized by the oil pump 3 and supplies the regulated oil to a hydraulic operation mechanism that operates by hydraulic pressure. The hydraulic control circuit 4 includes at least a high pressure circuit 41, a constant pressure circuit 42, a lubrication circuit 43, and an oil return circuit 44.

  The high pressure circuit 41 adjusts the oil supplied from the oil pump 3 in the hydraulic control circuit 4 to a high pressure. The high-pressure circuit 41 supplies oil adjusted to a high pressure to an oil supply portion that requires high-pressure oil (for example, the torque converter 110 or a secondary hydraulic chamber when the transmission mechanism is a belt-type transmission mechanism). is there. The high voltage circuit 41 is connected to the communication oil path L1.

  The constant pressure circuit 42 adjusts the oil supplied from the oil pump 3 in the hydraulic control circuit 4 to a constant pressure (including a substantially constant pressure). The constant pressure circuit 42 supplies oil adjusted to a constant pressure to an oil supply portion that requires constant pressure oil (for example, the switching solenoid 116 that operates the switching valve 115). The constant pressure circuit 42 is connected to the communication oil path L5. Here, the communication oil path L5 is connected to the communication oil path L10. The communication oil passage L <b> 10 is connected to a high-pressure oil passage 52 described later of the jet pump 5. Therefore, the oil adjusted to a constant pressure by the constant pressure circuit 42 can be supplied to the high-pressure oil passage 52 of the jet pump 5.

  The lubrication circuit 43 regulates the oil supplied from the oil pump 3 in the hydraulic control circuit 4 to a lower pressure than the high pressure oil regulated by the high pressure circuit 41 and the constant pressure oil. The lubrication circuit 43 supplies oil adjusted to the lubrication pressure to the lubrication portion 200, which is an oil supply portion that requires oil having a lubrication pressure. The lubrication circuit 43 is connected to the communication oil path L9. Here, the communication oil path L9 is connected to the communication oil path L11 via the communication oil path L2. Therefore, the lubricating circuit 43 is connected to the suction oil passage 51 of the jet pump 5 through the communication oil passage L9, the communication oil passage L2, and the communication oil passage L11. Therefore, the oil adjusted to the lubricating pressure by the lubricating circuit 43 can be supplied to the intake oil passage 51 of the jet pump 5.

  The oil return circuit 44 returns excess oil (oil having the lowest hydraulic pressure) to the upstream side of the oil pump 3 in the hydraulic control circuit 4. The oil return circuit 44 is connected to the communication oil path L12. Here, the communication oil path L12 is connected to the communication oil path L7. Accordingly, the oil return circuit 44 returns the excess oil between the oil pump 3 and the strainer 21 in the upstream side of the oil pump 3, in the first embodiment, by the communication oil path L 12 and the communication oil path L 7. Become. Here, the communication oil path L12 is connected to the communication oil path L11. The communication oil path L11 is connected to the suction oil path 51 of the jet pump 5. Therefore, excess oil returned from the oil return circuit 44 to the upstream side of the oil pump 3 can be supplied to the intake oil passage 51 of the jet pump 5.

  Here, a check valve 6 is provided in the communication oil passage L11. That is, the check valve 6 is provided between the intake oil passage 51 and the oil return circuit 44. The check valve 6 allows only inflow of oil from the oil return circuit 44 side to the intake oil passage 51 side. Therefore, the check valve 6 can prevent oil from flowing out to the oil return circuit 44 side. Thereby, for example, when the internal combustion engine 100 is cold, the discharge flow rate of the oil of the jet pump 5 is remarkably lowered, and even if the oil is going to flow backward from the discharge oil passage 53 (described later) of the jet pump 5 to the intake oil passage 51, 5 can be prevented, a decrease in the discharge flow rate due to the backflow can be suppressed, and the oil can be stably supplied to the lubricating portion 200.

  The jet pump 5 supplies oil to the lubrication part 200. The jet pump 5 includes a suction oil passage 51, a high-pressure oil passage 52, and a discharge oil passage 53 that are formed in members constituting the jet pump 5.

  The intake oil passage 51 is an oil passage through which oil discharged to the discharge oil passage 53 is supplied. The suction oil passage 51 is provided so as to cover the periphery of the high-pressure oil passage 52, one end is connected to the communication oil passage L <b> 11, and the other end is connected to the joining portion 53 a of the discharge oil passage 53. It is formed in communication. Since the oil return circuit 44 is connected to the suction oil passage 51 through the communication oil passage L11 and the communication oil passage L12 as described above, surplus oil can be discharged to the discharge oil passage 53. Further, as described above, since the lubricating circuit 43 is connected to the suction oil passage 51 via the communication oil passage L11, the communication oil passage L2, and the communication oil passage L9, a lubricating pressure having a higher hydraulic pressure than the surplus oil. This oil can be discharged into the discharge oil passage 53. Since the intake oil passage 51 is connected to the switching valve 115 via the communication oil passage L11 and the communication oil passage L2 as described above, the oil supplied to the torque converter 110 is also discharged to the discharge oil passage 53. Is possible.

  The high-pressure oil passage 52 is an oil passage through which oil having higher hydraulic pressure than oil supplied to the suction oil passage 51 is supplied. The high pressure oil passage 52 is formed such that one end portion communicates with the communication oil passage L <b> 10 and the other end portion communicates with the joining portion 53 a of the discharge oil passage 53. As described above, the high-pressure oil passage 52 is connected to the constant pressure circuit 42 via the communication oil passage L10 and the communication oil passage L5, so that oil with a constant pressure is supplied. Here, the constant pressure oil supplied from the constant pressure circuit 42 to the high pressure oil passage 52 is supplied from the lubricating circuit 43 and the oil return circuit 44 that can be discharged from the suction oil passage 51 to the discharge oil passage 53 as described above. Higher pressure than oil.

  Next, operation | movement of the oil lubrication apparatus 1-1 concerning Embodiment 1 is demonstrated. The oil having a constant pressure supplied from the constant pressure circuit 42 to the high pressure oil passage 52 is discharged to the joining portion 53 a of the discharge oil passage 53. At this time, a negative pressure is generated in the merging portion 53a. Due to the generated negative pressure, oil lower in pressure than the constant pressure oil filled in the suction oil passage 51 (excess oil from the oil return circuit 44, oil of lubricating pressure from the lubrication circuit 43, and supply to the torque converter 110) The supplied oil and the oil stored in the oil tank 2) are sucked into the merging portion 53a of the discharge oil passage 53.

  As described above, the lubricating portion 200 connected to the discharge oil passage 53 flows into the discharge oil passage 53 from the suction oil passage 51 together with the oil having a constant pressure flowing into the discharge oil passage 53 from the high pressure oil passage 52. Surplus oil, oil of lubricating pressure, and oil after supply are supplied. Compared with the case where all the oil supplied to the lubrication part 200 is the oil of the lubrication pressure adjusted by the lubrication circuit 43 from the oil pump 3, the oil supply amount of the lubrication pressure can be reduced. Since the capacity | capacitance of the pump 3 can be reduced and the useless work by the oil pump 3 can be reduced, efficiency can be improved.

  Further, the oil whose pressure is higher than the oil in the suction oil passage 51 supplied to the high-pressure oil passage 52 of the jet pump 5 is oil adjusted to a constant pressure by the constant pressure circuit 42. Therefore, since oil is discharged from the high pressure oil passage 52 of the jet pump 5 to the discharge oil passage 53 at a constant flow rate, the discharge flow rate of the jet pump 5 can be made constant. Thereby, the lubricating flow rate of the oil supplied to the lubrication part 200 can be made constant, and the oil can be stably supplied to the lubrication part.

  In addition, the oil filled in the discharge oil passage 53 of the jet pump 5 is the surplus oil from the oil return circuit 44, the oil of the lubricating pressure from the lubrication circuit 43, and the oil before being returned to the oil tank 2 such as the oil after supply. Oil. That is, a part of the oil filled in the discharge oil passage 53 of the jet pump 5 passes through the hydraulic control circuit 4 and the torque converter 110 and the like, so that the oil is higher in temperature than the oil in the oil tank 2. is there. Therefore, when the internal combustion engine 100 is cold, the oil viscosity increases, so that a decrease in the oil discharge flow rate by the jet pump 5 can be suppressed. Thereby, when the internal combustion engine 100 is cold, it is possible to suppress a decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 and to stably supply the oil to the lubrication portion 200.

  The discharge oil passage 53 of the jet pump 5 is filled with oil having a lubricating pressure from the lubricating circuit 43. Accordingly, the jet pump 5 can discharge oil to the discharge oil passage 53 regardless of the flow rate increasing function of the jet pump 5 by the lubrication pressure. As a result, when the internal combustion engine 100 is cold, the oil adjusted to the lubricating pressure by the lubricating circuit 43 is filled into the suction oil passage 51 of the jet pump 5, so that the suction oil passage 51 is filled with the lubricating pressure. The discharged oil can be discharged to the discharge oil passage 53. Thereby, when the internal combustion engine 100 is cold, it is possible to suppress a decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 and to stably supply the oil to the lubrication portion 200.

[Embodiment 2]
Next, an oil lubrication apparatus according to Embodiment 2 will be described. FIG. 2 is a diagram illustrating a configuration example of the oil lubrication apparatus according to the second embodiment. The oil lubrication device 1-2 according to the second embodiment shown in FIG. 2 is different from the oil lubrication device 1-1 according to the first embodiment shown in FIG. 1 in that the lubrication circuit 43 has a communication oil path L2 and a communication oil path. It is not connected to the suction oil passage 51 of the jet pump 5 via L11, but is connected between the discharge oil passage 53 and the lubricating portion 200. The basic configuration of the oil lubrication device 1-2 according to the second embodiment is substantially the same as the basic configuration of the oil lubrication device 1-1 according to the first embodiment. Therefore, the description of the same reference numerals is omitted or simplified.

  The lubrication circuit 43 is connected to the communication oil path L15. Here, the communication oil path L15 is connected to the communication oil path L13. Therefore, the lubrication circuit 43 is connected to the lubrication part 200 by the communication oil path L15 and the communication oil path L13. Therefore, the oil adjusted to the lubricating pressure by the lubricating circuit 43 can be supplied to the lubricating portion 200 without going through the jet pump 5.

  Next, the operation of the oil lubrication device 1-2 according to the second embodiment will be described. The oil having a constant pressure supplied from the constant pressure circuit 42 to the high pressure oil passage 52 is discharged to the joining portion 53 a of the discharge oil passage 53. At this time, a negative pressure is generated in the merging portion 53a. Due to the generated negative pressure, the oil that is lower in pressure than the oil of a constant pressure filled in the suction oil passage 51 (the surplus oil from the oil return circuit 44, the oil stored in the oil tank 2) is discharged to the discharge oil passage 53. Is sucked into the merging portion 53a.

  As described above, the lubricating portion 200 connected to the discharge oil passage 53 flows into the discharge oil passage 53 from the suction oil passage 51 together with the oil having a constant pressure flowing into the discharge oil passage 53 from the high pressure oil passage 52. Surplus oil and oil stored in the oil tank 2 are supplied. Therefore, similarly to the first embodiment, the capacity of the oil pump 3 can be reduced, and wasteful work by the oil pump 3 can be reduced, so that the efficiency can be improved. In addition, the lubricating flow rate of the oil supplied from the jet pump 5 to the lubricating portion 200 can be made constant, and the oil can be stably supplied to the lubricating portion 200.

  Oil is supplied to the lubrication portion 200 from the jet pump 5 and the lubrication circuit 43. Therefore, when the internal combustion engine 100 is cold, the viscosity of the oil increases, so that even if the oil discharge flow rate by the jet pump 5 decreases, the oil having the lubricating pressure can be supplied to the lubricating portion 200. That is, when the internal combustion engine 100 is cold, a decrease in the lubricating flow rate of the oil supplied to the lubricating portion 200 can be suppressed. Further, since the oil having the lubricating pressure from the lubricating circuit 43 is directly supplied to the lubricating portion 200 without passing through the jet pump 5, pressure loss due to passing through the jet pump 5 can be reduced. Therefore, compared with the case where oil of lubricating pressure is supplied from the lubricating circuit 43 to the lubricating portion 200 via the jet pump 5, the lubricating flow rate of the oil supplied to the lubricating portion 200 is reduced when the internal combustion engine 100 is cold. The decrease can be suppressed. As a result, oil can be stably supplied to the lubricating portion 200.

[Embodiment 3]
Next, an oil lubrication apparatus according to Embodiment 3 will be described. FIG. 3 is a diagram illustrating a configuration example of the oil lubrication device according to the third embodiment. The oil lubrication device 1-3 according to the third embodiment shown in FIG. 3 is different from the oil lubrication device 1-1 according to the first embodiment shown in FIG. 1 in that the oil pump 3 discharges as the internal combustion engine 100 rotates. The flow rate does not change but the discharge flow rate can be changed by the motor 7. The basic configuration of the oil lubrication device 1-3 according to the third embodiment is substantially the same as the basic configuration of the oil lubrication device 1-1 according to the first embodiment. Therefore, the description of the same reference numerals is omitted or simplified.

  The motor 7 is a drive source. The motor 7 is connected to the oil pump 3 and changes the rotational speed Ne of the oil pump 3 in accordance with the rotational speed of the motor 7. That is, the motor 7 changes the discharge flow rate of the oil pump 3 by changing the rotation speed Ne of the oil pump 3. The motor 7 is connected to the transmission ECU 120, and drive control is performed by the transmission ECU 120. That is, the transmission ECU 120 can control the rotational speed Ne of the oil pump 3 by controlling the driving of the motor 7. The motor 7 may be feedback controlled based on the rotation speed Ne of the oil pump 3.

  The oil temperature sensor 8 detects the oil temperature T of the oil in the oil lubrication device 1-3. The oil temperature sensor 8 is provided, for example, in the oil tank 2 or the like. The oil temperature sensor 8 is connected to the transmission ECU 120, and the detected oil temperature T of the oil is output to the transmission ECU 120.

  Next, the operation of the oil lubrication device 1-3 according to the third embodiment will be described. FIG. 4 is a diagram illustrating an operation flow of the oil lubrication apparatus according to the third embodiment. Here, control of the rotational speed Ne of the oil pump 3 will be described. The operation of the jet pump 5 is the same as that in the first embodiment, and a description thereof will be omitted.

  First, the transmission ECU 120 calculates a required lubrication flow rate Qr (step ST1). Here, the transmission ECU 120 calculates the flow rate of oil supplied to the lubricated portion 200 that can be lubricated with oil as the required lubrication flow rate Qr. Here, the required lubrication flow rate Qr is a substantially constant flow rate regardless of the operating state of the internal combustion engine 100 or a transmission (not shown).

  Next, the transmission ECU 120 acquires the oil temperature T (step ST2). Here, the transmission ECU 120 acquires the oil temperature T of the oil detected and output by the oil temperature sensor 8.

  Next, the transmission ECU 120 calculates an estimated discharge flow rate Qe based on the acquired oil temperature T (step ST3). Here, the discharge flow rate of the jet pump 5 is significantly reduced when the viscosity of the oil to be discharged is high. That is, the discharge flow rate of the jet pump 5 is significantly reduced when the oil temperature T of the oil is lowered (the viscosity of the oil is increased). Here, for example, a discharge flow rate map based on the oil temperature T calculated by decreasing the estimated discharge flow rate Qe as the oil temperature T decreases and the estimated discharge flow rate Qe is set in advance, and the oil temperature sensor 8 is set. The estimated discharge flow rate Qe is calculated based on the oil temperature T detected by.

  Next, the transmission ECU 120 determines whether or not the calculated required lubrication flow rate Qr exceeds the calculated estimated discharge flow rate Qe (step ST4). Here, the transmission ECU 120 determines whether or not the oil required by the lubricating portion 200 can be covered by the oil discharged from the jet pump 5.

  When the transmission ECU 120 determines that the calculated required lubrication flow rate Qr exceeds the calculated estimated discharge flow rate Qe (Yes in step ST4), the transmission ECU 120 calculates the rotation speed increase amount ΔNe (+) (step ST5). Here, the transmission ECU 120 determines that the calculated required lubrication flow rate Qr exceeds the calculated estimated discharge flow rate Qe, that is, when the oil viscosity is high and the discharge flow rate of the jet pump 5 is significantly reduced at a low oil temperature. In order to increase the discharge flow rate of the oil pump 3 and increase the flow rate of the oil supplied to the hydraulic control circuit 4, the rotation speed increase amount ΔNe (+) is calculated.

  When the transmission ECU 120 determines that the calculated required lubrication flow rate Qr is equal to or less than the calculated estimated discharge flow rate Qe (No in step ST4), the transmission ECU 120 calculates the rotation speed decrease amount ΔNe (−) (step ST6). Here, the transmission ECU 120 discharges the oil pump 3 when the calculated required lubrication flow rate Qr is equal to or less than the calculated estimated discharge flow rate Qe, that is, when the oil required by the lubrication portion 200 is provided by the oil from the jet pump 5. In order to reduce the flow rate and reduce the flow rate of the oil supplied to the hydraulic control circuit 4, a rotational speed reduction amount ΔNe (−) is calculated. Thereby, since the useless work by the oil pump 3 can be reduced, the efficiency can be improved.

  Next, the transmission ECU 120 performs drive control of the motor 7 based on the calculated rotation speed increase amount ΔNe (+) or rotation speed decrease amount ΔNe (−) (step ST8). Accordingly, the discharge flow rate of the oil pump 3 is increased when the internal combustion engine 100 is cold, and the discharge flow rate of the oil pump 3 is decreased when the internal combustion engine 100 is warm.

  As described above, the oil lubrication device 1-3 according to the third embodiment can reduce the capacity of the oil pump 3 and can reduce unnecessary work by the oil pump 3, as in the first embodiment. So efficiency can be improved. In addition, the lubricating flow rate of the oil supplied from the jet pump 5 to the lubricating portion 200 can be made constant, and the oil can be stably supplied to the lubricating portion 200.

  Further, when the internal combustion engine 100 is cold, the discharge flow rate of the oil pump 3 is increased, and the flow rate of oil supplied to the hydraulic control circuit 4 is increased. Therefore, the supply flow rate of the oil adjusted to the lubricating pressure charged from the lubricating circuit 43 to the suction oil passage 51 of the jet pump 5 increases. Here, since the check valve 6 is closed by increasing the supply flow rate of the oil adjusted to the lubrication pressure from the lubrication circuit 43, the oil of the lubrication pressure is positively filled in the suction oil passage 51 of the jet pump 5. The Therefore, when the internal combustion engine 100 is cold, even if the oil discharge flow rate by the jet pump 5 decreases due to the increase in the viscosity of the oil, the oil having the lubricating pressure is supplied to the lubricating portion 200 via the jet pump 5. can do. That is, when the internal combustion engine 100 is cold, a decrease in the lubricating flow rate of the oil supplied to the lubricating portion 200 can be suppressed. Thereby, when the internal combustion engine 100 is cold, it is possible to suppress a decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 and to stably supply the oil to the lubrication portion 200. Further, since the decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 can be suppressed only by controlling the rotational speed Ne of the motor 7 when the oil temperature is low, the number of parts, particularly the number of parts in the hydraulic control circuit 4 can be suppressed. Can be suppressed, and the cost can be reduced.

[Embodiment 4]
Next, an oil lubrication apparatus according to Embodiment 4 will be described. FIG. 5 is a diagram illustrating a configuration example of the oil lubrication device according to the fourth embodiment. The oil lubrication device 1-4 according to the third embodiment shown in FIG. 5 is different from the oil lubrication device 1-1 according to the first embodiment shown in FIG. 1 in that an oil pump that supplies oil to the hydraulic control circuit 4 is provided. In addition to the oil pump 3, an additional oil pump 9 whose drive is controlled by the switching mechanism 10 according to the operating state of the internal combustion engine 100 and the transmission is provided, that is, there are a plurality of oil pumps. Note that the basic configuration of the oil lubrication device 1-4 according to the fourth embodiment is substantially the same as the basic configuration of the oil lubrication device 1-1 according to the first embodiment. Therefore, the description of the same reference numerals is omitted or simplified.

  The additional oil pump 9 sucks oil stored in the oil tank 2 through a communication oil path L16 connected to the communication oil path L7. The sucked oil is pressurized and discharged to the communication pipe L17 communicating with the discharge side. Here, the communication pipe L <b> 17 is connected to the hydraulic control circuit 4. Therefore, the oil pressurized by the additional oil pump 9 can be supplied to the hydraulic control circuit 4 together with the oil pressurized by the oil pump 3. Here, the additional oil pump 9 is provided between the torque converter 110 and a forward / reverse switching mechanism (not shown), and is rotationally driven via the switching mechanism 10 when the torque converter 110 rotates. Here, the total capacity of the oil pump 3 and the additional oil pump 9 is set so as to cover the oil flow rate required in the hydraulic operation mechanism and the lubricating portion 200 provided in the transmission (not shown).

  The switching mechanism 10 controls the driving of the additional oil pump 9. The switching mechanism 10 switches the switching of the additional oil pump 9 and, in the fourth embodiment, switches between driving the additional oil pump 9 and stopping the driving. The switching mechanism 10 is connected to the transmission ECU 120, and switching control of the additional oil pump 9 by the switching mechanism 10 is performed by the transmission ECU 120.

  Next, the operation of the oil lubrication device 1-4 according to the fourth embodiment will be described. Here, switching control of the additional oil pump 9 will be described. The operation of the jet pump 5 is the same as that in the first embodiment, and a description thereof will be omitted.

  The transmission ECU 120 drives the additional oil pump 9 by the switching mechanism 10 when the oil supply flow rate required by the hydraulic operation mechanism provided in the transmission (not shown) increases, and supplies the oil supply flow rate to the hydraulic control circuit 4. Increase. Here, as a case where the oil supply flow rate required by the hydraulic operation mechanism provided in the transmission (not shown) increases, the lock-up clutch 113 of the torque converter 110 that is the hydraulic operation mechanism may be turned off. In the torque converter 110, the lock-up clutch 113 is turned off when the oil temperature is low. That is, when the oil temperature of the oil is low, the oil supply flow rate required by a hydraulic operation mechanism provided in the transmission (not shown) increases, and the plurality of oil pumps are driven.

  As described above, the oil lubrication device 1-4 according to the fourth embodiment can reduce the capacity of the oil pump 3 and reduce unnecessary work by the oil pump 3 as in the first embodiment. So efficiency can be improved. In addition, the lubricating flow rate of the oil supplied from the jet pump 5 to the lubricating portion 200 can be made constant, and the oil can be stably supplied to the lubricating portion 200.

  Further, when the internal combustion engine 100 is cold, the additional oil pump 9 is driven, and the flow rate of oil supplied to the hydraulic control circuit 4 increases. Therefore, the supply flow rate of the oil adjusted to the lubricating pressure charged from the lubricating circuit 43 to the suction oil passage 51 of the jet pump 5 increases. Here, since the check valve 6 is closed by increasing the supply flow rate of the oil adjusted to the lubrication pressure from the lubrication circuit 43, the oil of the lubrication pressure is positively filled in the suction oil passage 51 of the jet pump 5. The Therefore, when the internal combustion engine 100 is cold, even if the oil discharge flow rate by the jet pump 5 decreases due to the increase in the viscosity of the oil, the oil having the lubricating pressure is supplied to the lubricating portion 200 via the jet pump 5. can do. That is, when the internal combustion engine 100 is cold, a decrease in the lubricating flow rate of the oil supplied to the lubricating portion 200 can be suppressed. Thereby, when the internal combustion engine 100 is cold, it is possible to suppress a decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 and to stably supply the oil to the lubrication portion 200. Further, since the decrease in the lubrication flow rate of the oil supplied to the lubrication portion 200 can be suppressed only by controlling the rotational speed Ne of the motor 7 when the oil temperature is low, the number of parts, particularly the number of parts in the hydraulic control circuit 4 can be suppressed. Can be suppressed, and the cost can be reduced.

  As described above, the oil lubrication device according to the present invention is useful for an oil lubrication device including a jet pump in which a discharge oil passage is connected to a lubrication portion, and particularly for stably supplying oil to the lubrication portion. Is suitable.

It is a figure which shows the structural example of the oil lubrication apparatus concerning Embodiment 1. FIG. It is a figure which shows the structural example of the oil lubrication apparatus concerning Embodiment 2. FIG. FIG. 6 is a diagram illustrating a configuration example of an oil lubrication device according to a third embodiment. FIG. 10 is a diagram illustrating an operation flow of the oil lubrication device according to the third exemplary embodiment. FIG. 10 is a diagram illustrating a configuration example of an oil lubrication device according to a fourth embodiment.

Explanation of symbols

1-1 to 1-4 Oil lubrication device 2 Oil tank 21 Strainer 3 Oil pump 4 Hydraulic control circuit 41 High pressure circuit 42 Constant pressure circuit 43 Lubrication circuit 44 Oil return circuit 5 Jet pump 51 Suction oil passage 52 High pressure oil passage 53 Discharged oil Road 6 Check valve 7 Motor 8 Oil temperature sensor 9 Additional oil pump 10 Switching mechanism 100 Internal combustion engine 110 Torque converter 111 Pump 112 Turbine 113 Lock-up clutch 114 Casing 115 Switching valve 116 Switching solenoid 120 Transmission ECU
200 Lubrication part L1-L17 Communicating oil passage

Claims (12)

In an oil lubrication device comprising a jet pump in which a discharge oil passage is connected to a lubrication part, and supplying oil from the jet pump to the lubrication part,
The high-pressure oil passage of the jet pump is a constant pressure that supplies a constant pressure of oil to the hydraulic operating mechanism in a hydraulic control circuit that supplies oil to a hydraulic operating mechanism that hydraulically operates oil pressurized by the oil pump. An oil lubrication device connected to a circuit.   2. The oil lubrication device according to claim 1, wherein the suction oil passage of the jet pump is connected to an oil return circuit that returns excess oil to a downstream side of the oil pump in the hydraulic control circuit. .   The check valve for allowing only the inflow of the oil from the oil return circuit side to the suction oil passage side is provided between the suction oil passage and the oil return circuit. The oil lubrication device described.   The oil according to any one of claims 1 to 3, wherein the suction oil passage of the jet pump is connected to a lubricating circuit that supplies oil to the lubricating portion of the hydraulic control circuit. Lubrication device.   4. The lubricating circuit for supplying oil to the lubricating portion of the hydraulic control circuit is connected between the discharge oil passage and the lubricating portion. Oil lubrication device as described in one. In an oil lubrication device comprising a jet pump in which a discharge oil passage is connected to a lubrication part, and supplying oil from the jet pump to the lubrication part,
The intake oil passage of the jet pump is an oil return that returns surplus oil to the downstream side of the oil pump in a hydraulic control circuit that supplies oil to a hydraulic operation mechanism that hydraulically operates oil pressurized by the oil pump. An oil lubrication device connected to a circuit.   The check valve for allowing only the inflow of the oil from the oil return circuit side to the suction oil passage side is provided between the suction oil passage and the oil return circuit. The oil lubrication device described. In an oil lubrication device comprising a jet pump in which a discharge oil passage is connected to a lubrication part, and supplying oil from the jet pump to the lubrication part,
The intake oil passage of the jet pump is connected to a lubrication circuit that supplies oil to the lubrication portion of a hydraulic control circuit that supplies oil to a hydraulic operation mechanism that operates oil pressurized by the oil pump by hydraulic pressure. An oil lubrication device characterized by that. In an oil lubrication device comprising a jet pump in which a discharge oil passage is connected to a lubrication part, and supplying oil from the jet pump to the lubrication part,
Between the discharge oil passage and the lubrication portion, a lubrication for supplying oil to the lubrication portion of a hydraulic control circuit that supplies oil to a hydraulic operation mechanism that operates oil pressurized by an oil pump by hydraulic pressure An oil lubrication device characterized in that a circuit is connected.   The oil lubrication device according to any one of claims 2 to 9, wherein the oil pump is operated by a drive source capable of changing a rotation speed.   The oil lubrication device according to claim 10, wherein the number of revolutions of the oil pump is increased when the oil temperature of the oil is low. The oil pump is plural,
The oil lubrication apparatus according to any one of claims 2 to 9, wherein a plurality of oil pumps are driven when the oil temperature of the oil is low.

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