JP6156433B2 - Vehicle regeneration system - Google Patents

Description

  The present invention includes a liquid pump motor that functions as one of a liquid pump and a hydraulic motor, and a high-pressure accumulator and a low-pressure reservoir that are connected via the liquid pump motor and store liquid and gas under pressure. The present invention relates to a vehicle regeneration system.

  The basic structure of this type of regeneration system will be described with reference to FIG.

  FIG. 1 is a simplified drive system for an automobile equipped with a regenerative system ERS, and shows a state where the vehicle is running with the engine 1 as a power source. An output shaft of the engine 1 is connected to drive wheels 5 via an engine clutch 2, a transmission 3, and a differential gear 4, and the drive wheels 5 are rotationally driven by the engine 1.

  The regenerative system ERS includes a coupling mechanism 11, a motor clutch 12, an oil pump motor 13, a high pressure accumulator 14, a low pressure reservoir 15, and the like. The rotation shaft of the oil pump motor 13 is connected to the output shaft to the drive wheels 5 via the motor clutch 12 and the connection mechanism 11. The motor clutch 12 is in a disconnected state.

  The oil pump motor 13 is connected between a high-pressure accumulator 14 and a low-pressure reservoir 15 that store oil in communication with each other. The oil pump motor 13 has both functions of an oil pump and a hydraulic motor, and can be used as either one of the devices. The high pressure accumulator 14 stores high pressure oil at a level of several hundred atmospheres, and the low pressure reservoir 15 stores low pressure oil at a level of several atmospheres to several tens of atmospheres.

  As shown in FIG. 2A, during braking such as downhill traveling, the engine clutch 2 is disengaged and the motor clutch 12 is connected, so that the power of the drive wheels 5 is input to the oil pump motor 13.

  Thereby, the oil pump motor 13 is driven as an oil pump, and the oil in the low pressure reservoir 15 is sent to the high pressure accumulator 14. As a result, the internal pressure of the high-pressure accumulator 14 increases, and higher-pressure oil is accumulated (deceleration regeneration).

  As shown in FIG. 2 (b), when the vehicle starts, the oil in the high pressure accumulator 14 flows out toward the low pressure reservoir 15 with the motor clutch 12 engaged. The oil pump motor 13 is driven as a hydraulic motor by the discharge pressure of the oil, and the power is output to the drive wheels 5 (power running assist).

  An example of such a regeneration system is disclosed in Patent Document 1, for example.

JP 2012-111205 A

  In the automobile shown in FIG. 1, since the fuel tank 16 of the engine 1 is also installed, there is a problem that the regenerative system ERS is enlarged.

  This invention is made | formed in view of this point, The place made into the subject is to make a regeneration system compact.

  In order to solve the above problems, the present invention is characterized in that the fuel tank of the engine is a low pressure reservoir.

  Specifically, the present invention includes a liquid pump motor that functions as one of a liquid pump and a hydraulic motor, a high-pressure accumulator that is connected via the liquid pump motor and stores liquid and gas under pressure, and The following solution was taken for a vehicle regeneration system equipped with a low-pressure reservoir.

That is, the first invention includes a fuel tank that stores liquid fuel, an engine connected to the fuel tank, a pressurizing unit that pressurizes the low-pressure reservoir, and a control device that controls the driving of the pressurizing unit. The high pressure accumulator and the low pressure reservoir store the liquid fuel as the liquid, the fuel tank includes the low pressure reservoir, and the control device includes the low pressure reservoir of the engine. When the internal pressure of the low-pressure reservoir is reduced due to the use of the liquid fuel, the pressurizing means pressurizes the low-pressure reservoir to maintain the internal pressure of the low-pressure reservoir at a pressure that maintains the liquid state of the liquid fuel inside the low-pressure reservoir. It is characterized by performing pressurization control which performs .

According to this, since the high pressure accumulator and the low pressure reservoir store the liquid fuel of the engine and the fuel tank of the engine has the low pressure reservoir, the regenerative system is more compact than when the fuel tank is separately installed. it can be of.

Further , when the control device reduces the internal pressure of the low-pressure reservoir due to the use of the liquid fuel in the low-pressure reservoir of the engine, the pressurizing means maintains the internal pressure of the low-pressure reservoir at a pressure that maintains the liquid state of the liquid fuel in the low-pressure reservoir. Since the pressurization control to pressurize the low-pressure reservoir is performed, even if the engine uses the liquid fuel in the low-pressure reservoir and the internal pressure decreases, the liquid fuel in the low-pressure reservoir is reliably maintained in the liquid state. Can do.

In a second aspect based on the first aspect , the pressurizing means includes the engine, a gas chamber of the low pressure reservoir is connected to an exhaust path of the engine, and the control device is configured to perform deceleration regeneration. The driving pressure is controlled by inputting power of driving wheels to the engine and sending gas from the engine to the low-pressure reservoir through the exhaust path. Is.

  According to this, at the time of deceleration regeneration, the control device inputs the power of the drive wheel to the engine as the pressurizing means, and performs the pressurization control by sending the gas from the engine to the low pressure reservoir through the exhaust path. Therefore, it is not necessary to install a pressurizing means separately. Therefore, the regeneration system can be further downsized.

According to a third invention, in the first or second invention, the liquid chamber of the low-pressure reservoir is connected to the high-pressure accumulator, the engine, and a fuel supply port via a switching mechanism. A state in which the low-pressure reservoir and the high-pressure accumulator are connected; a state in which the low-pressure reservoir and the engine are connected; a state in which the low-pressure reservoir, the high-pressure accumulator and the engine are connected; The control device is configured to switch to a state in which the fuel supply port is connected, and the control device is also configured to control the switching mechanism.

  According to this, the switching mechanism has a state in which the low pressure reservoir and the high pressure accumulator are connected, a state in which the low pressure reservoir and the engine are connected, a state in which the low pressure reservoir, the high pressure accumulator and the engine are connected, and the low pressure reservoir Since the control device controls the switching mechanism, the connection destination of the low-pressure reservoir can be switched according to the vehicle request with a simple configuration.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the control device further includes an on-off valve for extracting the gas from the low-pressure reservoir, and the control device also controls the on-off valve, The switching mechanism is switched to a state in which the on-off valve is connected, and the on-off valve is opened and closed in order to maintain the internal pressure of the low-pressure reservoir below the upper limit pressure.

  According to this, the open / close valve for taking out the gas from the low-pressure reservoir is installed in the low-pressure reservoir, and the control device switches the switching mechanism to a state in which the low-pressure reservoir and the fuel supply port are connected at the time of fueling. Therefore, even if liquid fuel is supplied to the low pressure reservoir and its internal pressure rises, the internal pressure of the low pressure reservoir is reliably maintained below the upper limit pressure. be able to.

A fifth invention is characterized in that, in any one of the first to fourth inventions, the fuel tank has a main tank and an auxiliary tank, and the auxiliary tank is the low-pressure reservoir. To do.

  According to this, since the fuel tank of the engine has a main tank and an auxiliary tank, and the auxiliary tank is a low-pressure reservoir, the main tank is made compact compared to a case where only one fuel tank is separately installed. be able to. Therefore, the regeneration system can be made compact.

  Further, since the low pressure reservoir is provided as an auxiliary tank, the engine can be driven even if the liquid fuel in the main tank runs out.

  According to the present invention, the regenerative system can be made compact compared to the case where a fuel tank is separately installed.

It is the schematic which shows the regeneration system of the motor vehicle using an oil pump motor. It is the schematic explaining the regeneration control of the motor vehicle using an oil pump motor. (A) has shown the state at the time of deceleration regeneration, (b) has each shown the state at the time of power running assistance. 1 is a schematic diagram illustrating a configuration of an automobile according to a first embodiment. (A) And (b) is the schematic which shows the main structures of the regeneration system of the motor vehicle of Embodiment 1. FIG. 4 is a time chart illustrating an example of control of the automobile regeneration system according to the first embodiment. It is the schematic which shows the structure of the motor vehicle of Embodiment 2. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

(Embodiment 1)
In FIG. 3, the outline | summary of the motor vehicle C which mounted the regeneration system ERS of this embodiment is shown. Since the basic configuration is the same as that of the automobile shown in FIG. 1, the same reference numerals are used for the configurations having the same functions, and the description thereof is omitted. 3, reference numeral 21 denotes a drive mechanism of the engine 1 corresponding to the engine clutch 2 and transmission 3 described above, and reference numeral 22 denotes an oil pump motor 13 (corresponding to the coupling mechanism 11 and the motor clutch 12). 2 shows a drive mechanism of a liquid pump motor.

  The regenerative system ERS includes an engine 1 (pressurizing means), an oil pump motor 13, a high pressure accumulator 14, a low pressure reservoir 15, a first switching valve SV1, a second switching valve SV2 (switching mechanism), an on-off valve OV, and a control device 20. Etc.

  The engine 1 is an LPG engine. The fuel tank of the engine 1 is a low pressure reservoir 15. A throttle 18 is installed in the intake path 17 of the engine 1. A first switching valve SV1, a catalyst device 42, and a muffler 43 are installed in the exhaust path 41 of the engine 1 in order from the upstream side.

  The oil pump motor 13 is a device that functions as one of an oil pump (liquid pump) and a hydraulic motor (hydraulic motor).

  The high-pressure accumulator 14 is a small pressure-resistant container in which, for example, LPG (liquefied petroleum gas) at a level of 200 to 400 atm and air are stored in a separated state. The low-pressure reservoir 15 is a large pressure vessel, and for example, 10 to 30 atm level LPG and air are stored in a separated state. The lower limit pressure of the low pressure reservoir 15 is set to a pressure at which the internal LPG maintains a liquid state.

  Air is used for buffering, and other gases may be used as long as the gas does not cause a gas-liquid phase change under the temperature and pressure of the use environment, such as nitrogen gas.

  The low-pressure reservoir 15 is provided with a pressure-resistant container 15a and a piston 15b that freely slides inside the container 15a. The interior of the low pressure reservoir 15 is partitioned into an oil chamber OR (liquid chamber) and a gas chamber GR by a piston 15b. If the capacity of the oil chamber OR increases due to the sliding of the piston 15b, the capacity of the gas chamber GR decreases accordingly, and if the capacity of the oil chamber OR decreases, the capacity of the gas chamber GR increases accordingly.

  The oil chamber OR communicates with the oil pump motor 13 and stores LPG that moves back and forth between the high pressure accumulator 14. Therefore, the amount of LPG stored in the oil chamber OR changes according to the operation of the oil pump motor 13.

  On the other hand, air is stored in the gas chamber GR.

  The basic configuration of the high pressure accumulator 14 is the same as that of the low pressure reservoir 15.

  The low pressure reservoir 15 is provided with an oil inlet / outlet port 15c and a gas inlet / outlet port 15d. The oil inlet / outlet port 15 c communicates with the oil chamber OR inside thereof, and has a function of allowing LPG to enter and exit from the low pressure reservoir 15. The gas inlet / outlet port 15 d communicates with the gas chamber GR inside thereof, and has a function of allowing air to enter and exit from the low-pressure reservoir 15.

  An inflow pipe 44 is branched from the upstream side of the catalyst device 42 in the exhaust path 41 of the engine 1. The inflow pipe 44 is connected to the gas inlet / outlet 15 d of the low pressure reservoir 15. A heat exchanger 45 is installed at an intermediate portion of the inflow pipe 44. The heat exchanger 45 has a function of exchanging heat between the hot compressed air from the engine 1 and the outside air. Thereby, the compressed air from the engine 1 is cooled.

  The inflow pipe 44 is branched from the upstream side of the catalyst device 42 because the compressed air from the engine 1 is heated by the catalyst device 42 when branched from the downstream side.

  The first switching valve SV <b> 1 is installed at a branch portion of the inflow pipe 44 in the exhaust path 41 of the engine 1. The first switching valve SV1 switches between a state in which the engine 1 and the catalyst device 42 side are connected and a state in which the engine 1 and the low pressure reservoir 15 side (inflow pipe 44 side) are connected. The normal first switching valve SV1 is controlled so as to connect the engine 1 and the catalyst device 42 side.

  The second switching valve SV2 includes a first pipe 51 connected to the oil inlet / outlet port 15c, a second pipe 52 connected to the engine 1, a third pipe 54 connected to the fuel supply port 53, and an oil It is connected to a fourth pipe 55 connected to the pump motor 13. The second switching valve SV2 connects the oil chamber OR of the low pressure reservoir 15 and the oil chamber OR (oil pump motor 13) of the high pressure accumulator 14, and the oil chamber OR of the low pressure reservoir 15 and the engine 1. The state is switched between a state in which the oil chamber OR of the low pressure reservoir 15 and the engine 1 and the oil chamber OR of the high pressure accumulator 14 are connected, and a state in which the oil chamber OR of the low pressure reservoir 15 and the fuel supply port 53 are connected. . The normal second switching valve SV2 is controlled to be in a state of closing the flow path (closed position).

  The on-off valve OV is installed at the gas inlet / outlet 15 d of the low-pressure reservoir 15. The open / close valve OV connects the gas chamber GR of the low pressure reservoir 15 and the inflow pipe 44 when in the open state. The normal on-off valve OV is controlled to be closed.

  The control device 20 includes hardware such as a CPU and a memory, and software such as a control program, and has a function of comprehensively controlling deceleration regeneration and power running of the automobile. For example, the control device 20 also performs drive control of the engine 1 and the oil pump motor 13, switching control of the first switching valve SV1 and second switching valve SV2, opening / closing control of the opening / closing valve OV, and the like.

  In the regenerative system ERS, when the internal pressure of the low-pressure reservoir 15 is reduced by the control device 20 due to the use of the LPG of the low-pressure reservoir 15 of the engine 1, the internal pressure of the low-pressure reservoir 15 is changed to a pressure that keeps the LPG inside the liquid state. In order to maintain the pressure, the engine 1 is devised so that the low pressure reservoir 15 can be pressurized.

  When the LPG of the high pressure accumulator 14 has not reached the upper limit, the drive mechanisms 21 and 22 are switched to a state in which the power of the drive wheels 5 is input to the oil pump motor 13 during deceleration regeneration, and the low pressure reservoir 15 and the high pressure The second switching valve SV2 is switched to a state where the pressure accumulator 14 is connected. Then, LPG is sent from the low pressure reservoir 15 to the high pressure accumulator 14 by the oil pump motor 13 (functioning as an oil pump).

  At that time, if the internal pressure of the low-pressure reservoir 15 is reduced to a predetermined pressure or less due to the use of the LPG of the engine 1, the drive mechanism 21, the power of the drive wheels 5 is also input to the engine 1 by the control device 20. 22 is switched, the throttle 18 is fully opened (WOT), the first switching valve SV1 is switched to a state where the engine 1 and the low pressure reservoir 15 are connected, and the on-off valve OV is opened. As a result, the engine 1 (functioning as a pressure pump) is driven by the power of the drive wheels 5, and the engine 1 passes through the exhaust path 41 and the inflow pipe 44 and the gas in the low-pressure reservoir 15 as shown in FIG. Pressurization control for sending compressed air (exhaust gas) to the chamber GR is executed. Thereby, the internal pressure of the low pressure reservoir 15 rises.

  The predetermined pressure is set to be not less than the lower limit pressure and not more than the upper limit pressure of the low pressure reservoir 15, and is set to a pressure in the vicinity of the lower limit pressure, for example.

  When the oil pump motor 13 (functioning as a hydraulic motor) is activated (powering assist), the drive mechanisms 21 and 22 are switched to a state in which the drive wheels 5 and the oil pump motor 13 are connected, and the low pressure reservoir 15 and the high pressure accumulator The second switching valve SV2 is switched to a state in which the container 14 is connected. Then, the oil pump motor 13 drives the drive wheel 5 by the discharge force of the high pressure LPG stored in the high pressure accumulator 14, and the LPG of the high pressure accumulator 14 is returned to the low pressure reservoir 15.

  When the engine 1 and the oil pump motor 13 (functioning as a hydraulic motor) are operated (at the time of power running assistance), the drive mechanisms 21 and 22 are switched to a state in which the drive wheel 5 and the engine 1 and the oil pump motor 13 are connected, The second switching valve SV2 is switched to a state in which the low pressure reservoir 15, the engine 1, and the high pressure accumulator 14 are connected. Thus, engine drive control for sending LPG from the low pressure reservoir 15 to the engine 1 is executed. The engine 1 drives the drive wheels 5 together with the oil pump motor 13 by the LPG that has been sent.

  When the engine 1 is in operation (during power running or constant speed running), the drive mechanisms 21 and 22 are switched to a state where the engine 1 and the drive wheels 5 are connected, and a state where the low pressure reservoir 15 and the engine 1 are connected. The second switching valve SV2 is switched. Thus, engine drive control for sending LPG from the low pressure reservoir 15 to the engine 1 is executed. The engine 1 drives the drive wheels 5 by the LPG that has been sent.

  At the time of fuel supply to the low pressure reservoir 15, the drive mechanism 21, 22 is switched to a state where the drive wheel 5, the engine 1 and the oil pump motor 13 are disconnected by the control device 20, and the low pressure reservoir 15 and the fuel supply port 53 are switched. The second switching valve SV2 is switched to the connected state. 4B, when the LPG is supplied to the oil chamber OR of the low pressure reservoir 15 through the third pipe 54 and the first pipe 51, the control device 20 causes the internal pressure of the low pressure reservoir 15 to be In order to maintain the pressure below the upper limit pressure (for example, a pressure in the vicinity of the lower limit pressure), gas extraction control is performed in which the on-off valve OV is opened and closed. When the on-off valve OV is opened, air is taken out from the gas chamber GR of the low pressure reservoir 15, so that the internal pressure of the low pressure reservoir 15 decreases.

  In addition, it stops at the time of fuel supply.

In order to control the regeneration system ERS, various sensors are installed in these devices . For example, the low pressure reservoir 15, a pressure sensor SP for measuring the internal pressure is installed.

  During driving of the automobile C, the measurement value of the sensor SP is output to the control device 20, and the control device 20 controls the regenerative system ERS based on this measurement value.

  FIG. 5 shows an example of the control.

  The graph in FIG. 5 represents the traveling pattern of the automobile C. A thick line indicates a period during which the oil pump motor 13 is operating. A thin line indicates a period during which the engine 1 and the oil pump motor 13 are operating. A broken line indicates a period during which the engine 1 is operating.

  At the time of start-up, the second switching valve SV2 is switched to a state where the low pressure reservoir 15 and the high pressure accumulator 14 are connected, and the driving wheel 5 is driven by the oil pump motor 13 (hydraulic motor) with power running assistance.

  When the speed reaches V1, the second switching valve SV2 is switched to a state where the low pressure reservoir 15, the engine 1 and the high pressure accumulator 14 are connected, and the driving is switched to the driving of the engine 1 and the oil pump motor 13 (time: t1). At that time, LPG is sent from the low pressure reservoir 15 to the engine 1.

  Thereafter, when the speed becomes V2, the second switching valve SV2 is switched to a state where the low pressure reservoir 15 and the engine 1 are connected, and the engine 1 is switched to driving (time: t2), and at a speed V2 (> V1) for a predetermined time. Drive until reaching (time: t3).

  Then decelerate. At that time, the second switching valve SV2 is switched to a state where the low pressure reservoir 15 and the high pressure accumulator 14 are connected, the drive mechanisms 21 and 22 are switched from the engine 1 side to the oil pump motor 13 side, and deceleration regeneration is performed. Done. At that time, if the internal pressure of the low pressure reservoir 15 is reduced to a predetermined pressure or less due to the use of the LPG of the engine 1, the drive mechanisms 21 and 22 are switched to a state where the power of the drive wheels 5 is also input to the engine 1, The throttle 18 is fully opened, the first switching valve SV1 is switched to a state where the engine 1 and the low pressure reservoir 15 are connected, and the on-off valve OV is opened. When the engine 1 starts to be driven, compressed air is sent from the engine 1 to the gas chamber GR of the low-pressure reservoir 15, and accordingly, the internal pressure of the low-pressure reservoir 15 increases.

  Thereafter, when the speed becomes V3 (<V1), the engine 1 is switched to driving (time: t4), and the vehicle travels at the speed V3 until a predetermined time (time: t5) is reached.

  Then accelerate. At that time, the drive mechanisms 21 and 22 are switched from the engine 1 side to the oil pump motor 13 side, and power running assistance is performed. Thereafter, when the speed becomes V1 (time: t6), the vehicle decelerates and stops (time: t7). At that time, deceleration regeneration is performed. At that time, if the internal pressure of the low-pressure reservoir 15 is reduced to a predetermined pressure or less by using the LPG of the engine 1, the compressed air is sent from the engine 1 to the gas chamber GR of the low-pressure reservoir 15.

-Effect-
As described above, according to the present embodiment, the high pressure accumulator 14 and the low pressure reservoir 15 store LPG that is the liquid fuel of the engine 1 and the fuel tank of the engine 1 is the low pressure reservoir 15, and therefore, a fuel tank is separately installed. Compared to the case, the regenerative system ERS can be made compact.

  Further, when the control device 20 decreases the internal pressure of the low-pressure reservoir 15 due to the use of the LPG of the low-pressure reservoir 15 of the engine 1, the internal pressure of the low-pressure reservoir 15 is maintained at a pressure at which the internal LPG maintains a liquid state. Since the pressurization control for pressurizing the low pressure reservoir 15 by the engine 1 is executed, even when the engine 1 uses the LPG of the low pressure reservoir 15 and the internal pressure is lowered, the LPG of the low pressure reservoir 15 is surely kept in a liquid state. Can be maintained.

  In addition, the control device 20 executes the pressurization control by inputting the power of the drive wheels 5 to the engine 1 and sending the compressed air from the engine 1 to the low-pressure reservoir 15 via the exhaust path 41 during the deceleration regeneration. Therefore, it is not necessary to install a pressurizing means separately. Therefore, the regeneration system ERS can be further downsized.

  Further, the second switching valve SV2 connects the low pressure reservoir 15 and the high pressure accumulator 14, a state where the low pressure reservoir 15 and the engine 1 are connected, and the low pressure reservoir 15, the engine 1 and the high pressure accumulator 14. The control device 20 switches between the connection state and the connection state between the low-pressure reservoir 15 and the fuel supply port 53, and the control device 20 switches and controls the second switching valve SV2. Can be switched according to vehicle requirements.

  Further, an on-off valve OV for taking out air from the low-pressure reservoir 15 is installed in the low-pressure reservoir 15, and the control device 20 switches the second switching valve SV2 to a state in which the low-pressure reservoir 15 and the fuel supply port 53 are connected at the time of fuel supply. At the same time, the on-off valve OV is opened / closed so as to maintain the internal pressure of the low-pressure reservoir 15 below the upper limit pressure of the low-pressure reservoir 15, so that even if LPG is supplied to the low-pressure reservoir 15 and the internal pressure rises, The internal pressure can be reliably maintained below the upper limit pressure.

(Embodiment 2)
This embodiment is different from the first embodiment in that the fuel tank of the engine 1 is composed of a main tank 71 and an auxiliary tank, and the auxiliary tank is a low-pressure reservoir 15, but the other points are different from those of the first embodiment. It is the same composition. Therefore, in the following description, a duplicate description of the same components as those of the first embodiment may be omitted.

  The main tank 71 is connected to the engine 1 and a fuel supply port (not shown) for the main tank 71, in which LPG is stored.

  When the engine 1 drives the drive wheels 5, the LPG of the main tank 71 is exclusively used. When the LPG of the main tank 71 is reduced or lost, the LPG of the low pressure reservoir 15 (auxiliary tank) is reduced. used.

  The control of the regenerative system ERS is the same control as that of the first embodiment except for the control of the fuel tank to be used (the main tank 71 or the low pressure reservoir 15).

-Effect-
As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained.

  Further, since the fuel tank of the engine 1 has the main tank 71 and the auxiliary tank, and the auxiliary tank is the low-pressure reservoir 15, the main tank is made compact compared with the case where only one fuel tank is separately installed. be able to. Therefore, the regeneration system ERS can be made compact.

  Further, since the low pressure reservoir 15 is provided as an auxiliary tank, the engine 1 can be driven even if the LPG in the main tank 71 is exhausted.

(Other embodiments)
In each of the above embodiments, the liquid fuel is LPG. However, the present invention is not limited to this, and may be, for example, gasoline or alcohol. When the liquid fuel is LPG, the fuel tank of the engine 1 is made compact, so that the fuel tank is preferably a low pressure reservoir 15 as shown in the first embodiment. On the other hand, when the liquid fuel is gasoline or alcohol, the fuel tank of the engine 1 increases in size. Therefore, as shown in the second embodiment, the auxiliary tank is preferably a low pressure reservoir 15.

  Further, in each of the above embodiments, the pressurizing means is the engine 1, but the present invention is not limited thereto, and for example, a pressurizing pump installed separately may be used. However, it is desirable that the pressurizing means is the engine 1 in terms of making the regenerative system ERS compact.

  In each of the above embodiments, the low pressure reservoir 15 is pressurized during deceleration regeneration. However, the present invention is not limited to this, and the low pressure reservoir 15 may be pressurized during power running or constant speed running.

  As described above, the vehicle regeneration system according to the present invention can be applied to uses and the like that require a compact regeneration system.

1 Engine (pressurizing means)
5 Drive wheel 13 Oil pump motor (liquid pump motor)
14 High pressure accumulator 15 Low pressure reservoir (fuel tank, auxiliary tank)
20 Control device 41 Exhaust path 53 Fuel supply port 71 Main tank (fuel tank)
C Automobile (vehicle)
ERS regenerative system OR oil chamber (liquid chamber)
GR gas chamber SV2 second switching valve (switching mechanism)

Claims (5)

Regeneration of a vehicle including a liquid pump motor that functions as one of a liquid pump and a hydraulic motor, and a high-pressure accumulator and a low-pressure reservoir that are connected via the liquid pump motor and store liquid and gas under pressure A system,
A fuel tank for storing liquid fuel;
An engine connected to the fuel tank ;
Pressurizing means for pressurizing the low pressure reservoir;
A control device for controlling the driving of the pressurizing means ,
The high pressure accumulator and the low pressure reservoir store the liquid fuel as the liquid,
The fuel tank has the low pressure reservoir ;
The controller is
When the internal pressure of the low-pressure reservoir decreases due to the use of liquid fuel in the low-pressure reservoir of the engine, the pressurizing means maintains the internal pressure of the low-pressure reservoir at a pressure that maintains the liquid state of the liquid fuel in the low-pressure reservoir. A vehicle regeneration system configured to perform pressurization control to pressurize the low-pressure reservoir . The vehicle regeneration system according to claim 1 ,
The pressurizing means has the engine,
A gas chamber of the low-pressure reservoir is connected to an exhaust path of the engine;
The controller is
It is configured to execute the pressurization control by inputting driving wheel power to the engine during deceleration regeneration and sending gas from the engine to the low-pressure reservoir through the exhaust path. A regenerative system for vehicles. In the vehicle regeneration system according to claim 1 or 2 ,
The liquid chamber of the low-pressure reservoir is connected to the high-pressure accumulator, the engine, and a fuel supply port via a switching mechanism,
The switching mechanism includes a state in which the low pressure reservoir and the high pressure accumulator are connected, a state in which the low pressure reservoir and the engine are connected, and a state in which the low pressure reservoir, the high pressure accumulator and the engine are connected. , Configured to switch to a state of connecting the low pressure reservoir and the fuel supply port,
The controller is
A vehicle regeneration system configured to control the switching mechanism as well. The vehicle regeneration system according to claim 3 , wherein
An on-off valve for taking out the gas from the low-pressure reservoir;
The controller is
Also controls the on-off valve,
At the time of fuel supply, the switching mechanism is switched to a state in which the low pressure reservoir and the fuel supply port are connected, and the on-off valve is opened and closed to maintain the internal pressure of the low pressure reservoir below the upper limit pressure. A regenerative system for a vehicle. The vehicle regeneration system according to any one of claims 1 to 4 ,
The fuel tank has a main tank and an auxiliary tank,
The vehicle regeneration system, wherein the auxiliary tank is the low-pressure reservoir.

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