WO2016096794A1

WO2016096794A1 - Method for operating a mobile tool and motor-driven vehicle comprising a tool

Info

Publication number: WO2016096794A1
Application number: PCT/EP2015/079705
Authority: WO
Inventors: Ursula Kalinowski-Krumm; Christiane Schulte
Original assignee: Ursula Kalinowski-Krumm; Christiane Schulte
Priority date: 2014-12-16
Filing date: 2015-12-15
Publication date: 2016-06-23
Also published as: DE202015009500U1

Abstract

A method for operating a mobile tool (13) driven by the drive motor (2) of a vehicle (F). The method is characterised in that the tool (13) is controlled via a vehicle-side controller (22) for controlling the vehicle-side drive motor (2) and/or transmission (3), wherein after setting a target operating state of the tool (13) as a control variable of a control circuit for the controller (22), the operating state of the tool (13) is monitored, wherein the actual operating states of the tool (13) achieved in the process of monitoring are compared with the preset target operating state and wherein when an unacceptable deviation of an actual operating state from the target operating state is determined, the vehicle-side drive (2, 3) is influenced to match the actual operating state to the target operating state via the vehicle-side controller (22). The invention further relates to a motor-driven vehicle (F) comprising a tool (13) driven by the vehicle motor (2), wherein the tool (13) is connected into a control circuit comprising a device for presetting a target operating state and for monitoring the actual operating state of the tool (13) and comprising a vehicle-side controller (22) which is used to influence the vehicle-side drive motor (2) and/or transmission (3).

Description

Method for operating a mobile working device and motorized vehicle with a working device

The invention relates to a method for operating a mobile, driven by the drive motor of a vehicle implement, such as a high-pressure pump. Furthermore, the invention relates to a motor-driven vehicle with a driven by the vehicle engine implement.

There are numerous applications in which mobile implements are needed. A field of application is the operation of high-pressure pumps, as used for example for the elimination of extreme contamination of traffic areas, such as oil or the like or for sewer cleaning. These pumps operate at high pressures, sometimes at pressures greater than 200 bar. Such mobile high-pressure pumps are in many cases mounted on a trailer which, in addition to the high-pressure pump, typically carries a diesel engine with a large displacement as drive motor. With the internal combustion engine, the high-pressure pump is driven. High-displacement engines are required to operate high pressure pumps to provide the torque required to provide the desired high pump pressure without having to run the engine at its maximum speed. The motor driving the high-pressure pump is operated at constant speed. To regulate the pump pressure and thus the operating state of the high-pressure pump used as a working device are hydraulic adjusting devices, through which the liquid flowing through the pump to the pump outlet or via a bypass to the suction side is returned. Even if a high-pressure pump can be operated as a working device with at least a fairly constant pump output pressure with such a control, it would be desirable to improve the energy-related efficiency.

From DE 82 18 81 6 U1 a vehicle for attachable heavy equipment has become known. This vehicle has a changeover gear, which is connected downstream of the main clutch on the drive side and one Vehicle gearbox is connected upstream. Part of this change gear is a disconnect clutch, which separates the vehicle-mounted drive train from the vehicle-mounted transmission. To the motor-side drive shaft, a drive coupling for operating a PTO is connected, to which the or the tools can be connected. The implements are connected with the interposition of a transfer case to this power take-off, as it also includes a hydraulic drive for driving the separation of the clutch downstream drive train of the vehicle. While in a working operation, the vehicle speed is controlled by a hydrostatic converter, a drive of the PTO shaft is driven depending on the engine speed. Thus, the desired constant speed of the implement can be adjusted independently of the vehicle speed. From DE 10 2013 204 201 A1 discloses a suction and Hochdruckspülfahrzeug is known which has a switchable intermediate gear. This subdivides the drive train of the vehicle into a drive side and an output side. A shift device is provided for an intermediate gear to selectively couple the drive side of the drive train with either the output side of the drive train or the high pressure pump.

Based on this discussed prior art, the invention therefore has the object of proposing a method for operating a mobile, driven by the drive motor of a vehicle implement, in which a control of the operating state of the implement not only energy efficient, but also cost-effective. Furthermore, the object of the invention is to propose a motor-driven vehicle with a working device driven by the vehicle engine with which the aforementioned object is achieved.

The procedural object is achieved according to the invention by an aforementioned generic method in which a control of the implement via a vehicle-mounted controller for controlling the vehicle-mounted drive motor and / or gearbox is made, wherein after setting a desired operating condition the working device is monitored as the control variable of a control loop for the controller of the operating state of the implement, wherein the obtained in the way of monitoring actual operating conditions of the implement are each compared with the preset target operating condition and wherein upon detection of an intolerable deviation of an actual operating state of the desired operating state influence on the vehicle-side drive to equalize the actual operating state is taken to the desired operating state by the vehicle-side controller. According to the invention, the vehicle-related object is achieved by a motor-driven vehicle having a working device driven by the vehicle engine, in which the implement is influenced by a control circuit with a device for presetting a desired operating state and monitoring the actual operating state of the implement and with a vehicle-side the vehicle - side drive motor and / or transmission - serving controller is turned on.

In this method - the same applies to the claimed motor-driven vehicle - an already existing on-board controller, which has an influence on the drive of the vehicle, used to control with this the operating state of the implement, such as a high-pressure pump. As an influence on the drive, in the context of these explanations, those regulators are considered which have an influence on the engine operation (speed) and / or the transmission. It is understood that vehicle-side controller can only affect the transmission, if the vehicle has an automatic transmission, such as a modern double or multi-clutch transmission. In this respect, in this method, the desired operating state of the working device is set as the control variable of the control loop to a value with which the vehicle-side drive a desired operating state associated drive power, for example, a predetermined speed is represented. In this respect, not only a drive of the working device is carried out using the vehicle-side drive motor, which will usually be an internal combustion engine, especially a diesel engine, but at the same time also the regulation of the same. If an actual operating state is preset, the actual operating state is continuously monitored in the subsequent operation of the implement and Size for checking a control deviation returned from the desired operating state. Depending on the magnitude of the deviation, depending on whether or not the deviation of a currently detected actual operating state from the preset desired operating state is tolerable or not, the vehicle-side controller has an influence on or for the adjustment of the actual operating state. Operating state to the target operating state with respect to the detected deviation necessary vehicle-mounted drive units influence. In this case, the vehicle-side control algorithm with the resulting limit deviation is used. If the vehicle does not have an automatic transmission, the speed of the drive motor of the vehicle is influenced accordingly. If the vehicle has an automatic transmission, both the speed of the engine and the currently selected gear position can be influenced, whereby the influence on either the engine or the transmission or on both takes place. This takes place on the controller side depending on the detected control deviation and / or the prescribed control speed.

In the above-described operation of a motor vehicle equipped with a mobile work implement, the power train is disconnected between the on-vehicle transmission and the driven wheel (s) for running the vehicle. For this purpose, a separating clutch is present in the transmission of the vehicle downstream of the transmission. The implement itself is typically driven by a power take-off, which is connectable via an output coupling to the transmission-side part of this drive train. In any case, a control in the manner described above, regardless of whether the vehicle is driven by the drive motor at the same time or not.

For the realization of a control for a motor vehicle associated working device, it is thus necessary only to provide an access or an interface to an on-board already existing controller for influencing the engine operation and / or the transmission. Such a governor is typically the on-board cruise control system which, depending on the speed, influences the engine or, in the case of the present an automatic transmission affects the engine and / or the transmission shift position. The reference variable used in this method is not the vehicle speed, but the desired, preset operating state of the implement. In the case of a high-pressure pump, as a rule, the operating state is set via the pump speed, which correlates with the pump pressure. About a controller, these data are supplied to the vehicle-side controller. This means that no additional regulators or other components are required to perform the control, except for the control equipment-side sensor (s) required for the control, which are typically present anyway. In addition, in this concept, a vehicle-side drive control is used, which is very sensitive to control deviations for the otherwise provided speed control. Thus, also a control of the implement is correspondingly sensitive. This is especially desirable in high-pressure pumps as work equipment, as often provided on a mobile high-pressure pump when provided as a cleaning unit, several manually operated cleaning lances. A change in the pumping pressure by switching on or off a cleaning lance, due to the quasi-spontaneous on-board control leads to no significant reduction of the otherwise very noticeable pressure change of the other cleaning lances in operation. These pressure changes are usually noticeable by a significant recoil. In this concept, it is also possible to operate several implements, for example a plurality of high-pressure pumps, which are driven by a single drive motor. In such a case, the regulation is carried out across all operating work aggregates. In the event that the vehicle is to be driven during operation of at least one implement, this is preferably driven by the power take-off, via a power flow bypass, which bridges the transmission clutch downstream of the transmission in the drive train. A regulation of the driving speed then takes place via this force flow bypass, so that the vehicle-mounted regulator, even in such a case, for the purposes of controlling the at least one working unit regardless of the desired driving speed Vehicle is regulated.

The invention is described below with reference to an embodiment with reference to the accompanying Figure 1. Figure 1 shows a schematic representation of a vehicle with a high-pressure pump as a working device, driven by the vehicle-mounted drive train.

A drive train 1 is part of a vehicle F, which is not shown in any more detail. The vehicle F comprises a drive motor designed as an internal combustion engine 2 in the exemplary embodiment illustrated, which has a total of one transmission 3, which is designed as an automatic transmission in the illustrated embodiment the reference numeral 4 marked drive shaft drives. In the illustrated embodiment, the drive shaft 4 is a gimbal shaft.

In the drive shaft 4, a separating clutch 5 is integrated. By the separating clutch 5, the drive shaft 4 is divided into two drive part shafts 6, 7. The drive part shaft 6 is the one connected to the transmission 3. The second drive part shaft 7 drives, which is shown only schematically in the figure, an axis 8 of the mobile vehicle F at. At the end of each axle shaft 9, 9.1 of the drive axle 8, a wheel 10, 10.1 is driven in each case. If the separating clutch 5 is closed, the entire driving force of the internal combustion engine 2 is transmitted to the drive axle 8 with the interposition of the transmission 3. The vehicle F is then exclusively in the driving mode in which no work functions implemented or implements are driven. In the drive mode, the vehicle F can be driven at a relatively high speed compared to the speed with which the vehicle is driven when one or more work functions are exercised.

The powertrain 1 has a power take-off 1 1, which is the output side connected to an output clutch 12. The output clutch 12 is designed as a closing clutch and transmits, when closed, the rotational movement of the drive closer first drive part shaft 6 in the power take-off 1 1. This power take-off 1 1 is used to drive a working device, which in the illustrated embodiment a High pressure pump 13 is. The high-pressure pump 13 is driven by the power take-off 1 1, in which a distribution gear 14 is turned on. By the distribution gear 14 and a generator G can be driven.

The second drive part shaft 7 is associated with a drive coupling 15, via which a torque can be transmitted to the second drive part shaft 7 when the drive clutch 15 is closed. In its embodiment, the drive coupling 15 is driven by an electric motor 16, which receives the power required for its operation from the generator G. The rotational speed of the electric motor 1 6 is adjustable so that it can be operated according to the respective requirements with greater or lesser speed.

If the separating clutch 5 is open and the output clutch 12 and the drive clutch 15 are closed, the vehicle F can be moved during operation of the electric motor 1 6. The driving speed is adapted to the working function of the high-pressure pump 13. This driving speed is significantly lower than the speed with which the vehicle F can be driven in the driving mode. The torque generated by the electric motor 1 6 is coupled via the then closed drive clutch 15 in the second drive part shaft 7, which then rotates and the drive shaft 8 drives. When the disconnect clutch 5 is open and the driven output clutch 12 is closed and the drive clutch 15 is closed, the vehicle F is in its working mode. In this mode, operation of the high-pressure pump 13 has priority. The vehicle F is driven in response to the work to be performed by the high pressure pump 13 via the distribution gear 14. At the same time, the mobile vehicle F can be constantly driven at a low speed by the electric motor 16. Thus, via the power take-off 1 1, in which the torque of the driven by the internal combustion engine 2 first drive sub-shaft 6 is coupled with the interposition of the automatic transmission 3 and by the return flow of drive energy through the electric motor 1 6 and the drive clutch 15 and the second drive part shaft 7 a bypass Power flow provided. With the- sem is a drive of the mobile vehicle F possible, regardless of what speed and with what gear the drive power of the engine 2 is coupled into the first drive part shaft 6, thus independent of the rotational speed of the first drive part shaft 6. It is understood that when the disconnect clutch 5 is closed, the output clutch 12 and the drive clutch 15 are open. If, however, the output clutch 1 2 and the drive clutch 15 are closed, typically the separating clutch 5 is opened. The clutches 5 and 12 and 15 are adjustable according to a EITHER / OR algorithm. Quite the drive train 1 can also be operated in a manner in the working mode in which the vehicle F is stationary, either because the electric motor 1 6 is de-energized or the drive clutch 15 is open, while the output clutch 12 is closed. If in the latter case the electric motor 1 6 is energized, its drive power can be used for other Verrichtungsmaßnahmen.

A control device 17 is responsible for the control of the clutches 5, 12, 15. The control device 17 can also take over further control and / or monitoring functions, namely the control of the electric motor 1 6.

The operating state of the high-pressure pump 13 is exclusively via the vehicle-side drive, namely a control of the rotational speed of the motor 2 and / or the automatic transmission 3. As to be monitored at the high-pressure pump 13 operating state variable, the pump pressure at which the high pressure pump 13 is to be operated, preset as desired operating state variable and monitored during operation thereof. In addition or alternatively, the speed can be preset as a reference variable. A presetting of the pump pressure is performed with a presetting device 18, which is part of the high-pressure pump 13. The high-pressure pump 13 also has a pressure sensor 19, which can detect and output the current pump pressure. The output of the presetting device 18 and the pump pressure sensor 19 is connected via a data line 20 to an interface 21 of a speed controller 22 of the vehicle F. In the case of presetting the pump speed, a rotary number sensor provided. The speed controller 22 is already present on the vehicle side. For the speed control in a driving operation of the vehicle F, the speed controller 22 receives the necessary data via a speed control input line 23. In an operation of the high pressure pump 13, the speed controller 22 is switched so that it no longer responds to the velocity control line 23 incoming speed signals, but for the control receives the data provided via the data line 20 of the desired operating state of the high-pressure pump 13 and the actual operating states. Using the on-board control algorithm, the speed controller 22 changes the current vehicle drive in terms of the speed of the engine 2 and / or the respective selected gear in the automatic transmission 3 to compensate for a detected control deviation.

The distribution gear 14 is controlled in the embodiment shown in Figure 1 such that a change in the vehicle-mounted drive is completely passed on to the drive of the high-pressure pump 13 due to a control of the drive. In the embodiment shown in Figure 1, the separating clutch 5 is opened for this purpose. This means that with such a change in the control of the vehicle drive, a changed driving force does not affect the force output caused by the distribution gear 14. Thus, the high-pressure pump 13 can be controlled by utilizing the vehicle-side speed controller 22. It is understood that even during operation of the high-pressure pump 13 via the pre-adjusting the pump operating pressure can be changed.

Operation of the high-pressure pump 13 is also possible with a tap of coupled into the power take-off 1 1 drive power for other purposes, such as simultaneous driving of the vehicle F by the driving force bypass via the generator G and the electric motor 16. It is understood that in such an operation of the high-pressure pump 13, the driving speed of the vehicle F is not controlled by the speed controller 22. The drive energy required for driving the vehicle F is transmitted to the second drive sub-shaft 7 via the power flow bypass, by passing over the distributor. transmission gear 14 from the power take-off 1 1 a certain proportion of drive energy is coupled out. The control of the high-pressure pump 13 is thus superimposed by the drive unit setting of the vehicle F, which is required for driving the vehicle. To drive the vehicle F, the engine 2 is driven at a speed corresponding to the desired driving speed, the speed of the drive shaft 24 between the distribution gear 14 and the high-pressure pump 13 corresponding to the rotational speed required for the preset pump pressure. The excess, coupled into the distribution gear 14 speed is disengaged and drives the generator G, in turn, the motor 1 6 applied with current whose rotational motion is transmitted to the drive clutch 5 and thus to the drive part shaft 7. In order to control the driving speed, the current fed to the electric motor 1 6 is expediently regulated, so that it is not necessary to change the rotational speed coupled into the power take-off 1 1 for changes in the driving speed.

With such a design of the vehicle, the high-pressure pump 13 despite regulation via the speed controller 22 at standstill of the vehicle and also in driving, even if only in working mode, operated.

LIST OF REFERENCE NUMBERS

1 powertrain

2 internal combustion engine

3 automatic transmission

4 drive shaft

5 separating clutch

6 drive part shaft

7 drive part shaft

8 drive axle

9, 9.1 Axle shaft

, 10.1 wheel

1 1 power take-off

12 output coupling

13 high pressure pump

14 distribution gearbox

15 drive coupling

1 6 electric motor

17 control device

18 presetting device

19 pump pressure sensor

20 data line

21 interface

22 speed control

23 speed control input line

24 drive shaft

F vehicle

G generator

Claims

claims

Method for operating a mobile, driven by the drive motor (2) of a vehicle (F) implement, such as a high pressure pump (13), characterized in that a control of the implement (13) via a vehicle side controller (22) for controlling the on the vehicle-side drive motor (2) and / or gear (3) - is carried out, wherein after setting a desired operating state of the implement (13) as a control variable of a control loop for the controller (22) the operating state of the implement (13) is monitored wherein the actual operating states of the implement (13) obtained by means of the monitoring are respectively compared with the preset desired operating state and wherein upon detection of a non-tolerable deviation of an actual operating state from the desired operating state influence on the vehicle-side drive (2 , 3) for matching the actual operating state to the desired operating state by the vehicle-side Regulator (22) is taken.

A method according to claim 1, characterized in that for controlling the operating state of the working device (13), the vehicle-side cruise control system is used as a controller (22).

A method according to claim 1 or 2, characterized in that a high-pressure pump (13) is used as a working device.

Method according to one of claims 1 to 3, characterized in that the drive train (6) for operating the at least one working device (13) is disconnected and the drive energy of the drive motor (2) is coupled into a power take-off (1 1), which power take-off ( 1 1) which drives at least one working device (13).

Motor-driven vehicle with a working device (13) driven by the vehicle engine (2), characterized in that the working device (13) is integrated in a control loop with a device for Presetting a desired operating state and for monitoring the actual operating state of the working device (13) and with a vehicle-side, an influencing of the vehicle-side drive - motor (2) and / or transmission (3) - serving controller (22) is turned on.

Vehicle according to claim 5, characterized in that the engine (2) of the vehicle (F) is an internal combustion engine.

Vehicle according to claim 5 or 6, characterized in that the working device is a high-pressure pump (13).

Vehicle according to one of claims 5 to 7, characterized in that in the control loop several tools are turned on, the operating state is made jointly by the vehicle-side controller for all implements.

Vehicle according to one of claims 5 to 8, characterized in that the vehicle (F) has a the vehicle transmission (3) in the vehicle drive direction downstream Leistungsverteilungsein- direction, with which the drive train (1) for moving the vehicle (F) by means of a separating clutch ( 5) is separable and with which for driving the implement (13) necessary drive movement of the front of the separating clutch (5) located in a power take-off (1 1) can be introduced.

Vehicle according to claim 9, characterized in that the power distribution device in its transmission-side part of an output clutch (12) for coupling the drive torque in a power tool (13) driving power take-off (1 1) and the output side via a drive coupling (15), on the at open disconnect clutch (5) and closed output and drive clutch (12) or (15) via the power take-off (1 1), the open disconnect clutch (5) bridging bypass power flow is possible.

Vehicle according to claim 9 or 10, characterized in that the torque introduced into the power take-off (11) drives an energy converter (G) whose energy converted from the supplied mechanical energy for transmitting a torque to the output-side drive train (7) of the vehicle (F) is a motor (1 6) and its motor Torque in turn drives the drive clutch (15).