JP3153722B2 - Vehicle brake energy regeneration system device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake energy regeneration system.

[0002]

2. Description of the Related Art As an accumulator type brake energy regenerating system device for a vehicle, a hydraulic pump connected to a drive system of the vehicle is used.
A motor is provided to drive the hydraulic pump / motor as a pump when braking the vehicle, pressurize the hydraulic oil from the oil tank and accumulate the pressure in the accumulator, and when the vehicle starts / accelerates, the hydraulic pump / motor uses the accumulated pressure of the accumulator. There is known a motor that operates as an operating motor to regenerate the braking energy of a vehicle into a driving force (Japanese Utility Model Laid-Open No. 5-92025 and Japanese Patent Laid-Open No. 6-2562).

[0003]

Incidentally, it is also required that the gas pressure of the accumulator and the oil tank be periodically checked and, if necessary, that the gas and oil be removed for maintenance. In that respect, one of the conventional examples (Japanese Utility Model Laid-Open No. 5-92025)
Japanese Patent Application Laid-Open No. H10-157, pp. 157-181, there is a contrivance to ensure maintainability. However, there is a problem that these maintenance work cannot be easily and efficiently processed due to insufficient inspection facilities.

An object of the present invention is to solve such a problem.

[0005]

According to the first aspect of the present invention, a hydraulic pump / motor connected to a drive system of a vehicle is provided, and the hydraulic pump / motor is driven as a pump during braking of the vehicle.
A system device that pressurizes hydraulic oil from an oil tank and accumulates the pressure in the accumulator, while using the hydraulic pump / motor as a motor that operates with the accumulated pressure of the accumulator when the vehicle starts and accelerates, and regenerates the vehicle's brake energy into driving force. , An inspection door is formed on the side of the vehicle body, an oil tank is placed in the interior space of the vehicle body side where the inspection door opens and closes, and an inspection panel is provided on the high-pressure side and the low-pressure side where the inspection door is visible The high-pressure side inspection panel has a high-pressure gauge for checking the gas pressure of the accumulator and the connection of the accumulator oil return pipe.The low-pressure side inspection panel has a low-pressure gauge for checking the gas pressure of the oil tank and the oil tank. Each connection portion of the gas filling pipe and the oil supply pipe of the oil tank is provided.

According to the second aspect of the present invention, the oil level gauge of the oil tank is provided near the inspection panel on the low pressure side.

According to the third aspect of the present invention, the connection portion of the gas filling pipe of the accumulator is provided on the inspection panel on the high pressure side.

[0008]

According to the first aspect of the present invention, the inspection door is opened, and the inspection equipment provided on each of the high-pressure side and the low-pressure side inspection panels is used, so that the inspection and maintenance of the accumulator side and the oil tank side can be performed at one place. Can be easily performed. In this case, the same equipment for inspection and maintenance is installed on the high pressure side and low pressure side. However, instead of collecting them in one place, the inspection panel is divided into high pressure side and low pressure side. Without mistaking the sides
Inspection and maintenance can be handled accurately and efficiently.

According to the second aspect of the present invention, since the oil level gauge of the oil tank is located near the inspection panel on the low pressure side, the oil level of the oil tank is not misidentified along with the inspection and maintenance on the low pressure side. , Can be managed properly.

According to the third aspect of the present invention, the gas exchange of the accumulator can be easily performed as required at the time of inspection and maintenance of the high pressure side.

[0011]

1 and 2 show an example of application to a bus vehicle. 1 is an engine, 2 is a clutch, 3 is a transmission, 4 is a propeller shaft, 5 is a rear axle, and a final gear and A differential is housed, and the power from the engine is distributed to the left and right to rotate the tires.

In addition to the propeller shaft 4 on the engine 1 side, a propeller shaft 6 connected to the final gear of the rear axle 5 is provided and connected to a hydraulic pump / motor 7 via a gear box 8. The pump / motor 7 is a diagonal shaft type, and the oil tank 9 is connected to the low pressure port, and the accumulator 10 is connected to the high pressure port.

The pump / motor 7, the gear box 8 and the accumulator 10 are arranged inside side members extending in the front-rear direction of the frame 11, similarly to the power transmission system of the engine 1, but the oil tank 9 is maintained. In order to ensure the performance, the inspection door 12 described later is housed in an internal space on the side of the vehicle body that opens and closes. The accumulator 10 is attached to one side of the side rail to balance the weight with the oil tank 9.

The controller 15 controls the tilt angle of the pump / motor 7 and the gear ratio of the gear box 8.
A shift position sensor 16 for detecting a shift position of a shift lever as a means for detecting an operating state necessary for the control.
A brake pressure sensor 17 for detecting a brake pressure of a brake valve linked to a brake pedal, an accelerator opening sensor 18 for detecting an amount of depression of an accelerator pedal (accelerator opening), and a gas for detecting a gas pressure of the accumulator 10. A pressure sensor (19 in FIG. 3) is provided.

Under the control of the controller 15, the pump motor 7 operates as a pump in accordance with the brake pressure during braking of the vehicle, pressurizes hydraulic oil from the oil tank 9 to accumulate the hydraulic oil in the accumulator 10, while maintaining the pressure of the vehicle. Start ・
When accelerating, it operates as a motor in response to an accelerator command, and regenerates the accumulated pressure (brake energy) of the accumulator 10 into power.

FIG. 3 shows a hydraulic circuit of the brake energy regenerating system. Reference numeral 20 denotes a relief valve that opens and closes a high-pressure port of the pump / motor 7, and reference numeral 21 denotes a controller valve thereof. In order to increase the supply pressure from the pump / motor 7 to the accumulator 10, the pressure on the accumulator 10 side is introduced into the back pressure chamber of the relief valve 20, and the accumulator 10 passes through the pump motor 7 which operates as a motor when the vehicle starts and accelerates. In order to allow the flow of the pressurized oil to the oil tank 9, the back pressure chamber of the relief valve 20 is controlled to open to the low pressure side.

When the vehicle is stopped and the vehicle is running normally when the tilt angle of the pump / motor 7 is zero (the neutral point of the oblique axis), the control valve 2 is used to maintain the accumulated pressure of the accumulator 10.
The pressure on the accumulator 10 side is introduced into the back pressure chamber of the relief valve 20 via 1. 22 is a relief valve for limiting the maximum pressure on the accumulator 10 side,
Reference numeral 23 denotes a pilot relief valve, and reference numeral 25 denotes an oil cooler that cools hydraulic oil in the oil tank 9 during steady running. The pump / motor 7 (in this case, the tilt angle is Side controlled) to form a circulation circuit.

Meanwhile, it is also required that the gas pressure in the accumulator 10 and the oil tank 9 be checked periodically, and maintenance be performed by removing gas and oil as necessary. In this case, in order to efficiently perform the inspection and maintenance, the inspection panels 26 and 27 are divided into a high pressure side and a low pressure side at a position where the inspection door 12 on the side of the vehicle body can be opened as shown in FIGS. Provided.

A high-pressure gauge 28 (oil pressure measuring device) for checking the gas pressure of the accumulator 10 is provided on the inspection panel 26 on the high-pressure side.
A connection portion 29 for oil return coupled to the pipe;
Connection part 30 of gas filling pipe of accumulator 10
a and 30b are provided on the low-pressure side inspection panel 27 with a low-pressure gauge 31 (gas pressure measuring device) for checking the gas pressure of the oil tank 9.
A connection part 32 for gas filling of the oil tank 9 and a connection part 33 of a pipe for the oil supply drain of the oil tank 9 are provided respectively.

The oil tank 9 is housed in an internal space on the side of the vehicle body where the inspection door 12 opens and closes, and is provided with an oil level gauge 35 extending toward the vicinity of the inspection panel 27 on the low pressure side. When returning the oil pressure of the accumulator 10 to the oil tank 9, the connection portion 29 for returning the oil and the connection portion 33 of the pipe for the oil supply drain are provided between the inspection panels 26 and 27.
A separate pipe (indicated by a two-dot chain line) such as a hose for connecting

With this configuration, the inspection door 12 is opened, and the high pressure gauge 28 of the inspection panel 26, the low pressure gauge 31 of the inspection panel 27, and the oil level gauge 35 of the oil tank 9 are inspected, and various connections are made as necessary. Part 29,3
By using Oa, 30b, 32, and 33, inspection and maintenance of the accumulator 10 and the oil tank 9 can be easily performed at one place. At this time, the same equipment for inspection and maintenance is prepared on the high pressure side and the low pressure side. However, instead of collecting them in one place, the inspection panels 26 and 27 are divided into the high pressure side and the low pressure side. Inspection and maintenance can be performed accurately and efficiently without having to mix up the oil tank 9 and the oil tank 9.

[0022]

According to the first aspect of the present invention, a hydraulic pump / motor connected to a drive system of a vehicle is provided, and the hydraulic pump / motor is driven as a pump during braking of the vehicle to supply hydraulic oil from an oil tank. While accumulating and accumulating pressure in the accumulator, the hydraulic pump / motor operates as a motor that operates with the accumulated pressure of the accumulator when the vehicle starts and accelerates,
In a system device that regenerates the vehicle's brake energy into driving force, an inspection door is formed on the side of the vehicle body, an oil tank is placed in the internal space on the side of the vehicle body where the inspection door opens and closes, and at a position visible when the inspection door is opened Inspection panels are provided separately for the high pressure side and low pressure side.The high pressure side inspection panel has a high pressure gauge for checking the gas pressure of the accumulator and the connection part of the accumulator oil return pipe, and the low pressure side inspection panel has an oil tank. A low-pressure gauge for checking gas pressure, and connections for the gas filling pipe of the oil tank and the pipe for oil supply drain of the oil tank are respectively installed. Therefore, one check and maintenance necessary for each of the high-pressure side and the low-pressure side is provided. In this way, processing can be performed accurately and efficiently according to the inspection panels on the high and low pressure sides.

According to the second aspect of the present invention, the oil level gauge of the oil tank is provided near the low-pressure side inspection panel.
The oil level in the oil tank can also be properly managed.

According to the third aspect of the present invention, since the connection portion of the gas filling pipe of the accumulator is provided on the inspection panel on the high pressure side, gas exchange can be easily performed if necessary.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view similarly showing a layout.

FIG. 3 is a hydraulic circuit diagram of the brake energy regeneration mechanism.

FIG. 4 is a side view showing an arrangement state of an oil tank.

FIG. 5 is a partial plan view showing an arrangement state of an oil tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Clutch 3 Transmission 4 Propeller shaft 5 Rear axle 6 Propeller shaft 7 Hydraulic pump / motor 8 Gear box 9 Oil tank 10 Accumulator 12 Inspection door 15 Controller 26, 27 Inspection panel 28 High pressure gauge 29 Oil connection 30a, 30b Connection for gas filling pipe 31 Low pressure gauge 32 Connection for gas filling 33 Connection for pipe for oil supply drain 35 Oil level gauge

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-2562 (JP, A) JP-A-6-8806 (JP, A) JP-A-6-56008 (JP, A) JP-A-6-56008 32211 (JP, A) Japanese Utility Model Hei 5-92025 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 25/00 B60T 1/10 B60S 5/00

Claims (3)

(57) [Claims] A hydraulic pump / motor connected to a drive system of a vehicle is provided, the hydraulic pump / motor is driven as a pump when the vehicle is braked, and pressurizes hydraulic oil from an oil tank to accumulate pressure in an accumulator, while the vehicle is driven. In a system device that uses a hydraulic pump / motor as a motor that operates with the accumulated pressure of the accumulator when the vehicle starts and accelerates, an inspection door is formed on the side of the vehicle body, and the inspection door opens and closes. An oil tank is placed in the internal space on the side, and a high-pressure side and a low-pressure side inspection panel is provided at a position visible when the inspection door is opened.The high-pressure side inspection panel has a high-pressure gauge for checking the gas pressure of the accumulator. Connect the connection part of the oil return pipe of the accumulator to the low pressure side inspection panel with a low pressure gauge for checking the gas pressure of the oil tank. And a connection portion for a gas filling pipe of the oil tank and a connection section of a pipe for oil supply drain of the oil tank, respectively. 2. The brake energy regeneration system device according to claim 1, wherein an oil level gauge of the oil tank is provided near an inspection panel on a low pressure side. 3. The brake energy regeneration system device according to claim 1, wherein a connection portion of a gas filling pipe of the accumulator is disposed on the inspection panel on the high pressure side.