JP6361682B2 - Engine system with lubrication device - Google Patents

Description

  The present invention includes an engine including a cylinder and a piston that slides in the cylinder, an intake passage through which intake air introduced into the cylinder flows, and a lubrication device that supplies lubricating oil to the engine. Is related to the engine system.

  Conventionally, in an engine system in which a piston slides in a cylinder, lubricating oil is supplied to a sliding surface between the piston and the cylinder.

  For example, Patent Document 1 discloses a rotary piston engine provided with a device for supplying lubricating oil to the inner peripheral surface of a rotor housing constituting the sliding surface.

  Specifically, Patent Document 1 includes a metering oil pump that pumps oil onto the sliding surface, and the metering oil pump is disposed above the engine. A chamber in which the chamber is arranged in a posture positioned below the drive mechanism is disclosed.

  In the engine disclosed in Patent Document 1, air bubbles can escape upward from the oil in the plunger chamber in the metering oil pump, and when the oil is supplied from the metering oil pump to the engine, the air bubbles in the oil are moved upward. The oil can be released to the side of the metering oil pump located at, and oil with less bubbles can be supplied to the sliding surface.

JP 2008-150989A

  In the apparatus of Patent Document 1, oil with fewer bubbles can be supplied to the sliding surface, but in order to realize this, the attitude of the metering oil pump and its installation position are restricted. Therefore, there is a problem that the degree of freedom in layout is low.

  The present invention has been made in view of the above circumstances, and provides an engine system capable of increasing the degree of freedom in layout while reducing the content of bubbles of oil supplied to the sliding surface of the engine. For the purpose.

In order to solve the above-described problems, the present invention provides an engine including a cylinder and a piston that slides in the cylinder, an intake passage through which intake air introduced into the cylinder flows, and lubrication for the engine. In the engine system including a lubrication device that supplies oil, the lubrication device stores an oil pan that stores the oil for lubrication, and oil that is connected to the oil pan and introduced from the oil pan. A gas-liquid separation unit that introduces blow-by gas discharged from the cylinder and separates the blow-by gas into gas and oil, and stores oil separated from the blow-by gas together with oil introduced from the oil pan; an oil pumping means for pumping the oil stored in the gas-liquid separator to the sliding surface between the piston and the cylinder, the O Connected to the Le pumping means and said gas-liquid separator, and a return passage for returning the oil pumping means oil that has not been pumped to the sliding surface from the gas-liquid separator, the gas-liquid separator Is connected to a blow-by gas introduction passage for introducing a gas separated from the blow-by gas into the intake passage, and the oil pressure feeding means pressure-feeds the oil to the sliding surface from the start of the engine. (Claim 1).

  According to this engine system, oil is supplied to the sliding surface from the gas-liquid separation unit for gas-liquid separation of blow-by gas. Therefore, there is no need to separately provide a device for gas-liquid separation of blow-by gas and a device for storing oil supplied to the sliding surface and supplied from the oil pan, making the entire system compact. Can be.

  In addition, the gas-liquid separator is connected to the intake passage, and the inside of the gas-liquid separator becomes negative pressure as the intake passage is made negative. Accordingly, it is possible to more appropriately remove bubbles in the gas-liquid separation part from oil containing bubbles accompanying introduction from the oil pan, and supply oil with less bubbles to the sliding surface. Can be lubricated more appropriately. In particular, in this engine system, since oil is supplied to the sliding surface by the oil pressure feeding means from the start of the engine, it is possible to more reliably suppress oil shortage on the sliding surface.

In addition, the oil from which the bubbles are properly removed in the gas-liquid separator is reintroduced into the gas-liquid separator by the return passage . Therefore, the bubble content of the oil in the gas-liquid separation part can be more reliably maintained low.

Here, examples of the engine include a rotary piston engine including a rotary housing and a rotary piston that slides in the rotary housing, and the oil pressure feeding means is provided between the rotary housing and the rotary piston. One that pumps oil onto the sliding surface is mentioned (claim 2 ).

In the present invention, it is preferable that the engine is mounted on a vehicle having a driving motor capable of applying a driving force to wheels, and is driven only when a predetermined condition is satisfied during traveling of the vehicle (claim). Item 3 ).

  According to this configuration, the engine system is more effectively applied to a vehicle that has a drive motor in addition to the engine and has difficulty in layout while suppressing the bubble content of oil supplied to the sliding surface. It can be arranged compactly. Further, in this way, in a vehicle in which the engine is driven only when a predetermined condition is satisfied while the vehicle is running, the engine stop time is relatively long, so that the oil is easily exhausted on the sliding surface. On the other hand, in the present invention, as described above, since oil is supplied to the sliding surface from the start of the engine, it is possible to effectively suppress oil shortage on the sliding surface when the engine is driven. Can do.

Further, the engine is mounted on a vehicle having a battery that supplies power to the drive motor and a generator that supplies power to the battery, and is connected to the generator, and the remaining amount of the battery is preset. In the engine system configured to drive the generator to generate power when the amount falls below the reference remaining amount, the engine stop time tends to be longer. For this reason, if the present invention is applied to such an engine system, it is possible to more effectively suppress the shortage of oil on the sliding surface when the engine is driven (claim 4 ).

  As described above, according to the engine system including the lubricating device of the present invention, the degree of freedom in layout can be increased while reducing the content of oil bubbles supplied to the sliding surface of the engine.

1 is a schematic configuration diagram of a vehicle to which an engine system according to the present invention is applied. It is a schematic bottom view which shows the rear part structure of a vehicle. It is a schematic sectional drawing of an engine. It is the schematic block diagram which showed the distribution route of the oil for lubrication.

(1) Overall Configuration of Vehicle FIG. 1 is a schematic configuration diagram of a vehicle 200 to which an engine system 100 according to the present invention is applied. FIG. 2 is a schematic bottom view showing the rear structure of the vehicle 200. FIG. 3 is a schematic sectional view of the engine 2. FIG. 4 is a schematic configuration diagram showing a distribution route of the lubricating oil in the engine system 100. Hereinafter, the lubricating oil will be simply referred to as oil.

  The vehicle 200 is a hybrid vehicle. As shown in FIG. 1, in addition to the drive motor 8 and the engine 2, the vehicle 200 includes a fuel tank 5 that stores fuel supplied to the engine 2, a generator 3, an inverter 6, and a battery 7. Have. The engine 2 and the generator 3 constitute a power generation unit 1, and the generator 3 is driven by the engine 2 to generate power.

  The vehicle 200 is a series hybrid vehicle, and the engine 2 is driven mainly to drive the generator 3. In the present embodiment, the engine 2 is driven when the remaining amount of the battery 7 falls below a preset reference remaining amount.

  The electric power generated by the generator 3 is stored in the battery 7 via the inverter 6. Then, the drive motor 8 drives the wheel 9 using the electric power of the battery 7. The battery 7 is made of, for example, a lithium ion battery and has a large capacity.

  When the vehicle is decelerated, the battery 7 is charged with regenerative power generated by the motor 8. Further, although not shown, in the present embodiment, the vehicle 200 can charge the battery 7 with an ordinary charger that is a household power source, a quick charger installed in a parking area, or the like. A charging plug is provided. Therefore, in the vehicle 200 according to the present embodiment, there are few opportunities for the remaining amount of the battery 7 to be equal to or less than the reference remaining amount, and there are fewer opportunities for the engine 2 to be driven.

  As shown in FIG. 2, the engine 2, the generator 3, the fuel tank 5, and the inverter 6 are arranged below the rear front panel (not shown) and in the region between the pair of left and right rear side frames 201 and 201. It is arranged side by side in the direction. In addition, an intake passage 11 and an exhaust passage 46 connected to the engine 2 are also provided in this region. Further, an oil pan 41 for storing oil inside is disposed below the engine 2.

  In the present embodiment, the engine 2 is a single-rotor small rotary engine (rotary piston engine), and an eccentric shaft 23 (see FIG. 3) is arranged in the above-described region in a posture extending vertically. The engine 2 is disposed in a state of being accommodated in the engine case 30.

(2) Engine As described above, the engine 2 is a one-rotor rotary engine. The engine 2 includes an eccentric shaft 23 that is an output shaft of the engine 2 and an eccentric shaft 23 as shown in FIG. A substantially triangular rotor (rotary piston, piston) 21 that rotates in a planetary manner and a rotor accommodating chamber (cylinder) 22 that accommodates the rotor 21 are provided.

  Specifically, as shown in FIG. 3, the engine 2 includes a rotor housing 24 that surrounds the outer periphery of the rotor 21 and a pair of side housings 25 and 25 that sandwich the rotor housing 24 (see FIG. 3). Only one side housing is shown), and the rotor accommodating chamber 22 is defined by these. The inner peripheral surface 24a of the rotor housing 24 extends along a parallel trochoidal curve, and as shown in FIG. 3, the rotor accommodating chamber 22 has a shape like a bowl.

  The rotor 21 rotates while sliding on the inner peripheral surface 22a of the rotor accommodating chamber 22 in the rotor accommodating chamber 22 configured as described above.

  In the rotor accommodating chamber 22, three working chambers 28, 28, 28 are partitioned by the rotor 21, and the working chambers 28, 28, 28 move around the axis of the eccentric shaft 23 as the rotor 21 rotates. In each working chamber 28, 28, 28, intake, compression, expansion (combustion), and exhaust strokes are performed.

  In the present embodiment, the rotor 21 rotates in the direction of the arrow in FIG. 3. In FIG. 3, the upper left region is the region where the intake stroke is substantially performed, the upper right region is the region where the compression stroke is approximately performed, The region is a region where the expansion (combustion) stroke is substantially performed, and the lower left region is a region where the exhaust stroke is generally performed.

  The side housing 25 is connected to the intake passage 11 and is connected to the intake port 26 for introducing intake air into the rotor storage chamber 22. The side housing 25 is connected to the exhaust passage 46 and discharges combustion gas generated in the rotor storage chamber 22. An exhaust port 27 is formed.

  Two spark plugs 29 and 29 for igniting the air-fuel mixture in the working chamber 28 are attached to the rotor housing 24 side by side along the rotation direction of the rotor 21, and each rotor housing chamber is attached to the side housing 25. An injector (not shown) for supplying fuel to the inside 22 is attached.

  In addition, a plurality of seal members are attached to the rotor 21 in order to prevent the high-pressure combustion gas generated in the expansion (combustion) stroke in the rotor accommodating chamber 22 from blowing through the working chamber 28.

  Specifically, apex seals 31, 31, 31 are attached to the tops of the rotor 21 along the width direction of the rotor 21 (direction perpendicular to the paper surface in FIG. 3). Further, arcuate side seals 32, 32, 32 are attached to both side surfaces of the rotor 21 in the width direction so as to connect the adjacent top portions (in FIG. 3, only the side seal 32 on one side surface is attached). Show). Further, corner seals 33, 33, 33 are attached to portions where the side seals 32, 32, 32 are joined to each other. Each of the seals 31, 32, and 33 is fitted in a groove formed in the rotor 21, and is urged outward by a spring member (not shown).

  Here, as described above, the rotor 21 slides on the inner peripheral surface 22a of the rotor accommodating chamber 22, and oil is applied to each of the seal members 31, 32, 33 so that the sliding is performed smoothly. Supplied. Specifically, an oil nozzle 56 that injects oil into the rotor housing chamber 22 is attached to the rotor housing 24 so as to face the inner peripheral surface 22a of the rotor housing chamber 22, and the oil is stored in the rotor from the oil nozzle 56. It is injected to the inner peripheral surface 22 a of the chamber 22. Oil is pumped to the oil nozzle 56 from a metering oil pump 53 described later.

  The engine 2 configured as described above is housed inside the engine case 30 and mounted on the vehicle 200 with the eccentric shaft 23 extending in the vertical direction as described above.

(3) Blow-by Gas Route The engine system 100 is configured such that blow-by gas that is unburned gas leaked from the engine 2 is recirculated to the intake passage 11.

  That is, as described above, the engine 2 is provided with the respective seals 31, 32, 33, but a part of the gas in the engine 2 is caused by the seals 31, 32, 33 and the respective housings 23, 23, It leaks to the outside of the engine 2 directly through the gap between the engine 24 and to the outside of the engine 2 through the gap, or after moving to the eccentric shaft 23 side through the gap. Therefore, in the engine system 100, the blow-by gas that is the leaked gas is returned to the intake passage 11 and burned again in the rotor accommodating chamber 22.

  As shown in FIG. 4, the present engine system 100 includes an oil separator (gas-liquid separator) 42, a blow-by gas that connects the oil separator 42 and the engine case 30 in order to return the blow-by gas to the intake passage 11. A recovery passage 43 and a blow-by gas introduction passage 44 that connects the oil separator 42 and the intake passage 11 are provided.

  In the present embodiment, the blow-by gas recovery passage 43 is branched into two on the engine case 30 side. The open ends of the branch passages 43a and 43b are respectively disposed above and below the engine 2 so that blow-by gas is introduced into the oil separator 42 more efficiently.

  The oil separator 42 is a device for separating the blow-by gas into oil and gas (including mainly unburned gas). That is, as described above, oil is supplied to each of the seals 31, 32, and 33, and the blow-by gas contains oil. Therefore, oil is removed from the blow-by gas by the oil separator 42.

  Specifically, the oil separator 42 is a box-shaped member having a predetermined space formed on the inside thereof. In the oil separator 42, oil contained in blow-by gas is stored downward, and unburned gas is stored upward. To do.

  In the present embodiment, a plurality of baffle plates 42a are disposed in the oil separator 42, and blow-by gas collides with the baffle plates 42a, thereby promoting separation of gas and oil. .

  The blow-by gas introduction passage 44 is connected to the upper end of the oil separator 42. Therefore, gas that has been stored above the oil separator 42 and from which oil has been removed flows into the blow-by gas introduction passage 44, and this gas flows into the intake passage 11 through the blow-by gas introduction passage 44. To do.

  Here, the blow-by gas introduction passage 44 is connected to a portion of the intake passage 11 near the engine 2 and downstream of a throttle valve (not shown) that opens and closes the intake passage 11. Accordingly, when the throttle valve is closed, the portion of the intake passage 11 to which the blowby gas introduction passage 44 is connected becomes negative pressure, and accordingly, the blowby gas introduction passage 44 also becomes negative pressure. As a result, unburned gas flows from the oil separator 42 into the blow-by gas introduction passage 44 and is introduced into the intake passage 11.

(4) Lubricating device Next, the lubricating device 40 that is a device for supplying oil to the engine 2 will be described.

  The lubricating device 40 includes a metering oil pump (oil pressure feeding means) 53 in addition to the oil nozzle 56 and the oil separator 42. That is, in this embodiment, the oil separator 42 also constitutes a part of the lubrication device 40.

  The oil separator 42 and the oil pan 41 are connected by a main passage 51. The main passage 51 is provided with an oil pump (O / P) 51a and an oil filter (O / F) 51c. The oil in the oil pan 41 is pumped toward the oil separator 42 by the oil pump 51a, filtered by the oil filter 51c, and then flows into the oil separator 42. The discharge amount of the oil pump 51a is adjusted by the regulator 51b.

  A main gallery passage 52 connected to a main gallery (not shown) formed in the engine 2 branches off at a portion downstream of the oil filter 51c in the main passage 51, and has passed through the oil filter 51c. Part of the oil is introduced into the main gallery. That is, the engine 2 is formed with a main gallery for supplying oil to the bearings of the eccentric shaft 23 and the like, and the oil is supplied to each lubricating portion through the main gallery.

  Here, the oil pump 51a is coupled to the eccentric shaft 23 via a coupling mechanism, and is driven in conjunction with the rotation of the eccentric shaft 23, that is, the rotation of the engine 2.

  The oil separator 42 and the main passage 51 are also connected via the main return passage 58. The main return passage 58 is for avoiding the amount of oil stored in the oil separator 42 from exceeding a reference amount, and the oil level in the oil separator 42 is connected to the main return passage 58. When the height of the portion is reached, it is returned to the main passage 51 through the main return passage 58.

  The metering oil pump 53 is a pump that pumps the oil in the oil separator 42 to the oil nozzle 56 and thus to the inner peripheral surface 22 a of the rotor housing chamber 22.

  The metering oil pump 53 is connected to an oil inlet passage 54 connected to the lower portion of the oil separator 42 at its inlet (not shown), and oil discharge connected to the oil nozzle 56 at its outlet 53a. A passage 55 is connected. Accordingly, the metering oil pump 53 sucks oil stored in the lower portion of the oil separator 42 through the oil introduction passage 54 and discharges oil to the oil nozzle 56 through the oil discharge passage 55.

  Further, the metering oil pump 53 and the oil separator 42 are connected to each other by a pump-side return passage (return passage) 59 and are pumped to excess oil in the metering oil pump 53, that is, to the oil nozzle 56 side. The missing oil is returned to the oil separator 42 through the pump-side return passage 59.

  The metering oil pump 53 is electrically driven and is driven by receiving power supply regardless of the driving state of the engine 2. The metering oil pump 53 is controlled by a controller (not shown) provided in the vehicle. In the engine system 100, the metering oil pump 53 is driven immediately after the engine is started and discharges oil to the inner peripheral surface 22a of the rotor housing chamber 22 via the oil nozzle 56 immediately after the engine is started.

  In the lubricating device 40 configured in this manner, when the engine is started, the oil in the oil separator 42 passes through the oil introduction passage 54, the oil discharge passage 55, and the oil nozzle 56 by the metering oil pump 53, and accommodates the rotor. It is supplied to the inner peripheral surface 22 a of the chamber 22, that is, the sliding surface between the rotor accommodating chamber 22 and the rotor 21. The oil pump 51 a is driven as the engine 2 rotates, so that the oil in the oil pan 41 is supplied to the main gallery through the main gallery passage 52, and the oil in the oil pan 41 is supplied to the main passage 51. Through the oil separator 42. In addition, blow-by gas is introduced into the oil separator 42 through the blow-by gas recovery passage 43, and unburned gas in the oil separator 42 is introduced into the intake passage 11 through the blow-by gas introduction passage 44.

  Further, excess oil in the oil separator 42 is appropriately returned to the main passage 51 through the main return passage 58, and excess oil of the metering oil pump 53 is returned to the oil separator 42 through the pump side return passage 59. It is.

(5) Operation, etc. As described above, in the engine system 100 according to the present embodiment, oil is applied to the inner peripheral surface 22a of the rotor accommodating chamber 22 and between the rotor accommodating chamber 22 and the rotor 21. Oil is introduced from the separator 42. Therefore, oil with fewer bubbles can be supplied to the inner peripheral surface 22a of the rotor accommodating chamber 22, and the rotor 21 can be rotated more smoothly.

  Specifically, as described above, the oil supplied to the sliding surface 22 a between the rotor accommodating chamber 22 and the rotor 21 is stored in the oil pan 41, but is stored in the oil pan 41. The oil that has flowed down from each part of the engine 2 is oil in which a lot of air is mixed during the circulation. Therefore, the oil in the oil pan 41 is an oil having a relatively large air content. Further, the oil in the oil pan 41 is discharged to the outside by the oil pump 51a, and the discharged oil further includes bubbles by the stirring of the oil pump 51a. On the other hand, in the present embodiment, the oil after being temporarily stored in the oil separator 42 is supplied to the rotor accommodating chamber 22 instead of being supplied directly from the oil pan 41. Therefore, oil with less bubbles can be supplied to the inner peripheral surface 22a of the rotor accommodating chamber 22.

  In particular, in the present embodiment, the intake passage 11 is connected to the oil separator 42 via the blow-by gas introduction passage 44, and the pressure inside the oil separator 42 becomes negative as the intake passage 11 becomes negative pressure. . Accordingly, bubbles are easily removed from the oil in the oil separator 42, and the oil stored in the lower portion of the oil separator 42 is a high-quality oil with fewer bubbles. It can supply to the inner peripheral surface 22a.

  Further, in the present embodiment, the metering oil pump 53 and the oil separator 42 are connected by the pump-side return passage 59, which is excess oil that has not been pumped from the metering oil pump 53 to the engine 2 side and has air bubbles. The oil having a small content is introduced into the oil separator 42 again. Therefore, the oil in the oil separator 42 can be made more reliable with less bubbles.

  Moreover, in the present embodiment, oil is discharged from the metering oil pump 53 to the inner peripheral surface 22a of the rotor housing chamber 22 from the time of engine startup. Therefore, the oil shortage on the inner peripheral surface 22a of the rotor accommodating chamber 22 can be more reliably suppressed.

  In particular, in this embodiment, the metering oil pump 53 is electrically driven and is driven regardless of the rotational state of the engine 2. Therefore, the metering oil pump 53 can be driven more reliably immediately after the engine is started, and an appropriate amount of oil can be supplied to the inner peripheral surface 22a of the rotor housing chamber 22.

  Further, in the present embodiment, as described above, the engine 2 is driven only when the remaining amount of the battery 7 is equal to or less than the reference remaining amount, and the driving opportunity of the engine 2 is reduced. That is, in this engine system 100, the engine 2 is stopped for a long period of time, and along with this, much of the oil on the inner peripheral surface 22a of the rotor accommodating chamber 22 flows into the oil pan 41 and the like, and the oil on the inner peripheral surface 22a Is becoming depleted. On the other hand, in this embodiment, by being comprised as mentioned above, lubricating oil can be effectively supplied to the internal peripheral surface 22a of the rotor storage chamber 22. FIG.

  In the present embodiment, as described above, the oil separator 42 for gas-liquid separation of blow-by gas stores oil to be supplied to the inner peripheral surface 22a of the rotor housing chamber 22. Therefore, the entire engine system can be made more compact and the degree of freedom in layout can be increased compared to the case where a device for gas-liquid separation of blow-by gas and a device for storing this oil are provided separately. Can do.

  In particular, the layout becomes difficult when many devices such as the drive motor 8, the inverter 6, and the large-capacity battery 7 must be mounted on the vehicle 200 in addition to the engine 2 as in the above-described embodiment. These can be arranged compactly and the layout thereof can be facilitated.

(6) Modified Example In the above embodiment, the case where the electric metering oil pump 53 is used as the pressure feeding means for pressure feeding the oil from the oil separator 42 to the inner peripheral surface 22a of the rotor accommodating chamber 22 has been described. The pumping means is not limited to the above as long as it can pump oil to the inner peripheral surface 22a of the rotor accommodating chamber 22 from the time of starting the engine. However, if an electric pump is used, oil can be pumped more reliably to the inner peripheral surface 22a of the rotor accommodating chamber 22 from the start of the engine, and the shortage of oil on the inner peripheral surface 22a can be more reliably suppressed. Can do.

  Moreover, although the said embodiment demonstrated the case where the engine 2 was a 1-rotor rotary engine, the number of rotors is not restricted to this. Further, the engine 2 may be a reciprocating engine or the like.

  In the above-described embodiment, the case where the driving motor 8 is mounted on the vehicle 200 in addition to the engine 2 and the engine 2 is driven to generate the generator 3 has been described. May be directly transmitted to the wheel 9 and the wheel 9 may be driven by the engine 2. However, as described above, the layout is difficult in a vehicle in which the drive motor 8 is provided in addition to the engine 2, and therefore it is effective when applied to such a vehicle.

  Further, when the driving force of the engine 2 is directly transmitted to the wheels 9 in addition to the driving force of the driving motor 8, the condition for driving the engine 2 is that the remaining amount of the battery 7 is in advance as in the above embodiment. It is not limited to the condition that it is below the set reference remaining amount. For example, the engine 2 may be configured to be driven in addition to the drive motor 8 during acceleration or the like.

  Furthermore, the engine system 100 may be applied to a vehicle 200 that does not have the driving motor 8 and is given driving force to the wheels 9 only by the engine 2.

2 Engine 3 Generator 7 Battery 8 Drive motor 11 Intake passage 21 Rotor (rotary piston, piston)
22 Rotary storage chamber (cylinder)
41 Oil pan 42 Oil separator (gas-liquid separator)
44 Blow-by gas introduction passage 53 Metering oil pump (pressure feeding means)
59 Pump-side return passage (return passage)

Claims (4)

An engine system including an engine including a cylinder and a piston that slides in the cylinder, an intake passage through which intake air introduced into the cylinder flows, and a lubrication device that supplies lubricating oil to the engine ,
The lubricating device is:
An oil pan for storing the lubricating oil;
The oil introduced from the oil pan connected to the oil pan is stored, and blow-by gas discharged from the cylinder is introduced to separate the blow-by gas into gas and oil, and from the blow-by gas A gas-liquid separator that stores the separated oil together with the oil introduced from the oil pan;
Oil pumping means for pumping oil stored in the gas-liquid separator to a sliding surface between the cylinder and the piston ;
A return passage for connecting the oil pressure feeding means and the gas-liquid separation unit, and for returning the oil that has not been pressure-fed from the oil pressure feeding means to the sliding surface, to the gas-liquid separation unit ;
The gas-liquid separator is connected to a blow-by gas introduction passage for introducing gas separated from the blow-by gas into the intake passage,
The engine system provided with a lubricating device, wherein the oil pressure feeding means pressure-feeds the oil to the sliding surface from the start of the engine. In the engine system provided with the lubricating device according to claim 1 ,
The engine is a rotary piston engine comprising a rotary housing and a rotary piston sliding in the rotary housing,
The engine system provided with a lubricating device, wherein the oil pressure feeding means feeds oil to a sliding surface between the rotary housing and the rotary piston. In the engine system provided with the lubricating device according to claim 1 or 2 ,
The engine is mounted on a vehicle having a driving motor capable of applying a driving force to wheels, and is driven only when a predetermined condition is satisfied while the vehicle is running, and the engine includes a lubrication device system. An engine system comprising the lubricating device according to claim 3 ,
The engine is mounted on a vehicle having a battery that supplies electric power to the drive motor and a generator that supplies electric power to the battery, is connected to the generator, and the remaining amount of the battery is preset. An engine system comprising a lubrication device that is driven when the reference remaining amount is less than or equal to a predetermined reference remaining amount to cause the generator to generate electric power.

Images