JPH051558A - Engine supercharging and air compression system - Google Patents

Abstract

PURPOSE:To provide an engine supercharging and air compression system that is able to perform two operations of air supercharging into an engine and air compression with one equipment, and to make air compressibility improvable. CONSTITUTION:An engine (1) supercharging and air compression system is provided with a hydraulic pump 3 being driven by the engine 1 and outputting a hydraulic fluid, and a first hydraulic motor 13 connected to this pump 3. In addition, it has a supercharger 31 being driven by this first hydraulic motor 13, and supercharging air into the engine 1, and a second hydraulic motor 19 connected to the hydraulic pump 3 via a control valve 15. Moreover, it is provided with a compressor 33 being driven by this second hydraulic motor 19, and taking in supercharged air from the supercharger 31, pressurizing it and outputting compressed air, a control means controlling the opening or closing the control valve 15 on the basis of the presence of rotation of the engine 1 or a quantity of this compressed air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine supercharger and an air compression device capable of both supercharging an engine used in a vehicle and obtaining high-pressure air.

[0002]

2. Description of the Related Art Conventionally, a vehicle such as an automobile equipped with a supercharger has been provided in order to improve engine output. This supercharger
This is a device that sends air at atmospheric pressure or higher to the intake system of the engine, and generally has two drive systems, a mechanical drive system and an exhaust turbine drive system. A mechanical drive type supercharger is driven to rotate using the crankshaft of an engine, and an exhaust turbine drive type supercharger is used to rotate a turbine using exhaust gas and rotate driven by its turbine rotation output. Is.

On the other hand, there is provided an air compression device which obtains compressed air by using an engine as a drive source, and mechanical equipment which operates by the compressed air is used at a construction site or the like.

[0004]

Conventionally, the supercharger and the air compression device are provided as separate devices, and when the functions of the two are required, two devices are prepared separately. It was necessary and inconvenient.

Further, in the conventional air compression apparatus, since the atmospheric air is compressed as it is, it is difficult to improve the compression rate.

Therefore, an object of the present invention is to allow supercharging of air to the engine and air compression by one device,
Moreover, it is an object of the present invention to provide a supercharger and an air compression device for an engine that can improve the compression ratio of air.

[0007]

In order to achieve the above object, an engine supercharging and air compression apparatus of the present invention comprises:
A hydraulic pump driven by an engine to output hydraulic oil, a first hydraulic motor connected to the hydraulic pump, a supercharger driven by the first hydraulic motor to supercharge air to the engine, and the hydraulic pressure. A second hydraulic motor connected to the pump via a control valve, a compressor driven by the second hydraulic motor to take in the supercharged air from the supercharger, pressurize it, and output compressed air; A control means for controlling the opening / closing of the control valve based on the presence or absence of rotation or the amount of the compressed air is provided.

[0008]

In the apparatus having the above construction, the output of the engine becomes the hydraulic oil by the hydraulic pump, the hydraulic oil is supplied to the first hydraulic motor for driving the supercharger, and the first hydraulic motor for driving the compressor is supplied via the control valve. It is also supplied to the second hydraulic motor. The first hydraulic motor is driven to rotate by the hydraulic oil to drive the supercharger. The second hydraulic motor is driven when the control valve controls the opening of the control valve.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a hydraulic circuit diagram showing an embodiment of an engine supercharging and air compression apparatus of the present invention.

In FIG. 1, an engine 1 takes in air supplied through an intake manifold and fuel such as light oil and burns the fuel to obtain a rotational force. This rotational force drives the variable displacement hydraulic pump 3. The hydraulic pump 3 is configured so that the pressure of discharged hydraulic oil and the like can be adjusted by an actuator 5 driven by a solenoid valve 47. The suction pipe 7 connected to the suction port of the hydraulic pump 3 has an oil tank 9
Has been extended to the bottom. Further, the discharge port of the hydraulic pump 3 is connected to the first hydraulic motor 13 via the pipe 11, and a pipe 17 provided with a solenoid valve 15 as a control valve is provided.
Is connected to the second hydraulic motor 19. The oil discharged from the first hydraulic motor 13 is led to the oil tank 9 via the pipe 21, and the oil discharged from the second hydraulic motor 19 is led to the oil tank 9 via the pipe 23. Further, a bypass valve 27 is provided in the pipe 25 connected to the portion of the pipe 11 immediately before the input of the first hydraulic motor 13, and the bypass valve 27 opens when the pressure of the hydraulic oil reaches a certain level or more. It is like this.

The first hydraulic motor 13 can drive the supercharger 31. The supercharger 31 is driven by the first hydraulic motor 13 to suck in and pressurize outside air, and supercharge the pressurized air into an intake manifold (not shown) of the engine 1.
The second hydraulic motor 19 can drive the compressor 33 to rotate. The compressor 33 is the second
By being driven to rotate by the hydraulic motor 19, the compressed air from the supercharger 31 is sucked and further pressurized, and the compressed air is supplied to the surge tank 35. The compressed air in the surge tank 35 can be used as a compressed air drive source or can be used for vehicle braking.

A pressure sensor 37 is provided in the surge tank 35.
The pressure sensor 37 obtains a detection signal corresponding to the pressure in the tank 35 and supplies the detection signal to the control device 41. The control device 41 includes a rotation speed signal from a rotation speed sensor 43 provided on the rotation shaft of the engine 1 and a supercharging pressure sensor 45 provided on the discharge side of the supercharger 31.
The supercharging pressure detection signal from the motor and the compressor signal for starting the compressor are input. The control device 41 is composed of a microcomputer, which includes a central processing unit, a RAM, and an R.
It is composed of an OM, an input / output device, an AD converter, and the like. The control device 41 controls the operation of the second hydraulic pump by energizing / de-energizing the solenoid valve 15 based on the input signal, and energizing / de-energizing the solenoid valve 47 to discharge pressure of the hydraulic pump 3 ( Flow rate) can be adjusted.

Next, the operation of such an embodiment will be described.

First, the operation of this embodiment will be described by dividing it into a normal driving operation of a vehicle and an operation of air compression during use of a vehicle brake or construction.

During normal operation, the controller 41
Causes the solenoid valve 15 to be in a non-excited state and closed. By driving the hydraulic pump 3 with the engine 1 in such a state, the hydraulic oil discharged from the hydraulic pump 3 is supplied only to the first hydraulic motor 13. As a result, the first hydraulic motor 13 rotationally drives the supercharger 31, and pressurized air is supplied from the supercharger 31 to the intake manifold of the engine 1 to be supercharged. At this time, the control device 41 controls the rotation speed sensor 43.
The rotation speed signal from the supercharged pressure sensor 45 and the pressure detection signal from the supercharging pressure sensor 45 are fetched, and the solenoid valve 47 is controlled to be excited / de-energized based on the signals to drive the actuator 5 to discharge the hydraulic pump 3. Adjust the hydraulic oil pressure (flow rate) to the optimum value.

The operation when using compressed air will be described. When the air in the surge tank 35 is insufficient by using a brake or the like, or when an air source is needed for construction work, a detection signal from the pressure sensor 37 is used. Alternatively, in response to the compressor signal, the control device 41 causes the solenoid valve 15 to be in an excited state and open. As a result, the hydraulic oil discharged from the hydraulic pump 3 is supplied to the second hydraulic motor 19 via the pipe 17 and operates the second hydraulic motor 19. By giving the motion output of the second hydraulic motor 19 to the compressor 33, the compressor 33
Sucks in compressed air from the supercharger 31,
This is supplied to the surge tank 35 as compressed air.

Further, the control device 41 deenergizes the solenoid valve 15 when the pressure in the surge tank 35 reaches a specified value by the detection signal from the pressure sensor 37 or when the compressor signal disappears. As a result, the second hydraulic motor 19 is stopped.

In this embodiment, as described above, since the supercharger 31 is provided and the compressed air from the supercharger 31 can be further compressed by the compressor 33,
Supercharging of the engine 1 and high pressure air as an air source can be obtained.

[0020]

As described above, according to the present invention,
It becomes possible to realize both functions of supercharging the engine and compressing air with a single device. Also, during air compression,
Two-stage supercharging can be realized in which the air compressed by the supercharger is further compressed by the compressor.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Engine 3 Hydraulic Pump 13 First Hydraulic Motor 15 Solenoid Valve (Control Valve) 19 Second Hydraulic Motor 31 Supercharger 33 Compressor 37 Pressure Sensor 41 Control Device

Claims (1)

Claim: What is claimed is: 1. A hydraulic pump driven by an engine to output hydraulic oil, a first hydraulic motor connected to the hydraulic pump, and an engine driven by the first hydraulic motor. A supercharger for supercharging air, a second hydraulic motor connected to the hydraulic pump via a control valve,
A compressor that is driven by the second hydraulic motor and that takes in supercharged air from the supercharger and pressurizes it to output compressed air, and opens and closes the control valve based on whether the engine is rotating or the amount of compressed air. A supercharging and air compression device for an engine, comprising: a control means for controlling.