TW201422387A - Process and system to control injection procedures in fuel operated drive in fastener-setting apparatus - Google Patents

Abstract

The invention relates to a method for controlling injection processes in fuel-operated fastening tools (1) comprising a fuel tank (8) which has a certain fuel tank temperature and in which a certain fuel tank pressure prevails and from which fuel is fed to a combustion chamber (12) by a time-controlled metering device (10), the combustion chamber being at a certain combustion chamber temperature. In order to further improve control of injection processes, a metering time of the time-controlled metering device (10) is determined or corrected on the basis of a characteristic map and taking into account at least one parameter other than or in addition to the ambient temperature.

Description

Method and system for injection process in an appliance for controlling fuel operation

The present invention relates to a method for controlling a process of injection in a fuel operated applicator, the applicator comprising a fuel container having a fuel container temperature and wherein is a fuel container pressure from which the fuel is It is sent to a combustion chamber via a time-controlled metering device in which a fuel chamber temperature is present.

An application device is disclosed in the European patent application EP 2 368 669 A2, wherein the fuel demand is determined by a combustion chamber temperature, wherein the rate of a dosing (Dotieren, dosing) is determined by the temperature of the fuel container. The use of a control unit to calculate the dosing time is described in US Patent Application No. US 2011/0180582 A1, which has a pressure sensor for determining the pressure in a fuel container. . This fuel container pressure is used to estimate the state of fullness of the fuel container.

The object of the present invention is to further improve the control of the injection process of the fuel operated applicator.

The side of the injection process in an applicator for controlling fuel operation The applicator includes a fuel container having a fuel container temperature and wherein the fuel container is pressurized from the fuel container to a combustion chamber via a time-controlled metering device. A fuel chamber temperature is present in the combustion chamber for the purpose of obtaining or modifying a characteristic field and using parameters other than ambient temperature or using the parameter and the ambient temperature.

In a control device or a control unit of the applicator, for example, the required control time of the dosing device is determined using the measured ambient temperature and a stored characteristic curve. The dosing device is preferably configured as a dosing valve, and the control time of the dosing valve is also referred to as "quantitative supply time". The different container types or fuel types or fuel types have a repair characteristic associated with them, and the obtained control time is obtained. Or the dosing time is, for example, corrected by the surrounding pressure and the state of fullness of the fuel container, and the fuel is preferably liquid gas.

A preferred embodiment of the method is characterized by correcting the dosing time using the fuel container temperature. This fuel container temperature should be used instead of the ambient temperature to determine the quantitative supply time. This is particularly advantageous if a warm fuel container is used in a cold application device, the fuel container temperature is used in accordance with the invention, even if in this case too much fuel is not supplied, but the correct supply is applied, thus, application The appliance can also be operated directly with a warm fuel container. The fuel container can be detected using a temperature sensor in a receiving compartment of the fuel container in the applicator. However, the temperature of the fuel container can also be detected in a contactless manner, for example using an infrared sensor. If this is not the case, an RFID tag can also be placed in the fuel container, with which the temperature of the fuel container can be detected and transmitted by the RFID interface on the control unit or control unit.

Another preferred embodiment of the method is characterized in that the fuel container pressure is used to determine or correct the quantitative supply time. The fuel container pressure should be used instead of the ambient temperature to find In addition to this, the embodiment is comparable to the previous embodiment, and the fuel container pressure can be determined using a pressure sensor located anywhere between the fuel container and the dosing device. A pressure sensor for detecting the pressure of the fuel container may also be provided in the fuel container, in the receptacle of a fuel container, in the line between the fuel container/receiver and the dosing device, or in the dosing device .

Another preferred embodiment of the method is characterized by using a fuel temperature to determine or correct the quantitative supply time. The fuel temperature should be used instead of the ambient temperature to determine the quantitative supply time. The fuel temperature can be detected using a sensor device at any location between the fuel container and the dosing device. The fuel temperature is preferably detected in the dosing device or in the vicinity of the dosing device. If not in this manner, the fuel temperature is detected near the fuel container or in a receptacle of the fuel container.

Another preferred embodiment of the method is characterized by using the fuel container pressure and the fuel temperature to determine or correct the quantitative supply time. If the dosing time is not corrected by the state of fullness of the fuel container, it is also advantageous to use the fuel container pressure and the fuel temperature to determine the dosing time. A sensor for determining the temperature of the fuel may be combined with a pressure sensor into a single component to determine the fuel vessel pressure.

Another preferred embodiment of the method is characterized in that a fuel container is additionally used to find or correct the quantitative supply time. For example, such corrections can be implemented using characteristic fields or lines that are stored in a control device within the appliance.

A further preferred embodiment of the method is characterized in that the fuel type is additionally used to determine or correct the quantitative supply time. For example, such a correction can be implemented using a characteristic field or characteristic line stored in a control device inside the appliance.

Another preferred embodiment of the method is characterized in that the determined supply time is The effect of the surrounding pressure is corrected. As such, the quality of the application process can be further improved.

A further preferred embodiment of the method is characterized in that the determined dosing time is corrected for the state of fullness of the fuel container. The quality of such an application process can be further improved.

The invention further relates to a system for controlling the injection process in an application device for liquid fuel operation, which is used to carry out the aforementioned method.

The applicator is an applicator for applying a fixing element such as a bolt. Such an applicator is therefore also referred to as a bolt applicator, which applicator is preferably constructed as an operating applicator which operates with gas as a fuel, which is preferably a gas canister or a gas cartridge which is embedded in the applicator.

Other advantages, features, and details of the invention are set forth in the description which follows. FIG.

(1)‧‧‧Applying appliances

(2) ‧‧‧shell

(4)‧‧‧Hands

(5) ‧‧‧Applying end

(6) ‧ ‧ 匣 匣

(8) ‧‧‧fuel containers

(10) ‧ ‧ Quantitative supply devices

(11)‧‧‧Connecting lines

(12)‧‧‧fuel room (combustion space)

(14)‧‧‧Ignition device

(16)‧‧‧ Trigger

(18) ‧‧‧Pistons

(19)‧‧‧Ignition wires

(20)‧‧‧Control device (control unit)

(21)‧‧‧ (detection of ambient temperature) sensor device

(22)‧‧‧ (detection of ambient pressure) sensor device

(24)‧‧‧Sensor device

(25)‧‧‧Sensor device

(26)‧‧‧Sensor device

(28)‧‧‧RFID tags

Figure 1 is a highly simplified illustration of an applicator (1) having a housing (2).

Figure 1 is a diagram of a highly simplified applicator (1) having a housing (2). The housing (2) comprises a handle (4), the user (1) can hold the handle to drive a fixing element, the fixing element is at an application end (5), and can be pulled out from the application device (1) Into a substrate.

The fixing element used is preferably provided by a reservoir (6) inside the appliance, which is provided near the application end (5) of the application device (1). The fixing elements are preferably automatically removed from the reservoir (6) and provided at the application end (5).

The energy to drive the fixing element into the substrate is one of the inside of the application device (1) Fuel container (8) is provided. The fuel in the fuel container (8) is liquid gas, so the fuel container (8) is also called a gas tank or a gas cartridge.

The fuel container (8) can be connected to a combustion chamber (12) or a combustion space via an adjustable or adjustable dosing device (10) and a connecting line (11). The dosing device (10) should preferably be in the form of a metered supply valve.

In the combustion space or combustion chamber (12), the fuel (ie, gas) is separated from the fuel container (8) and mixed with air to form a flammable mixture that is ignited by an ignition device (14) to fix a stationary component (such as a bolt) Or a nail) into the substrate. When a trigger (16) of the application device (1) is actuated, the required energy for driving is transmitted from the combustion chamber (12) to a stationary member of the application end (5) via a piston (18).

Preferably, a turbulence generating device and/or a flushing device (not shown) is provided in the combustion chamber (12), which is specially designed in the form of an orifice plate or a fan that moves during or shortly after the fuel is ignited to burn Turbulence is created in the chamber (12), and the combustion chamber (12) is flushed and/or cooled. For example, the fan is driven by an electric motor (also not shown).

For control purposes, a control device or control unit (20) is provided in the application device (1). An ignition wire (19) extends from the control unit (20) to an ignition device (14) in the combustion chamber (12). The ignitable mixture in the combustion chamber (12) is ignited by means of an ignition device (14) using an ignition wire (19).

The control device (20) has a sensor device (21) for detecting ambient temperature and a sensor device (22) for detecting ambient pressure. The two sensor devices (21) (22) can be combined with each other.

Other sensor devices (24) (25) and fuel container (8) and dosing device (10) The "connection line" (11) is matched. The sensor device (24) can be combined with the sensor device (25) and used to detect the pressure in the connecting line (11). This pressure corresponds to the fuel container pressure inside the fuel container (8).

The sensor device (25) detects the temperature of the fuel in the connecting line (11). The fuel temperature corresponds to the temperature of the fuel in the fuel container (8).

A sensor device (26) is mated with a fuel container (8) for detecting the temperature of the fuel container of the fuel container (8), and in the following, various temperature detections are detected as fuel containers ( 8) As an example. The temperature of the fuel container (8) can be detected using the sensor device (26) in the application device (1). Here the sensor device (26) may or may not be in contact with the fuel container. For example, the detection of temperature can also be achieved in a contactless manner using an infrared sensor.

If this is not the case, a so-called RFID tag (28) can be placed on the fuel container. Here, the letter RFID stands for English Radio Frequency Identification, which means that it is identified by electromagnetic waves. This letter tag represents a storage chip, and it is one day. Wires are connected and can be read via radio.

The combustion chamber temperature can be detected by a sensor device (25) at any position of the connection line (11) between the fuel container (8) and the dosing device (10). The fuel temperature is preferably determined in the vicinity of the fuel container (8) by means of a sensor device (25).

A sensor device (24) for determining the container pressure of the fuel container (8) can also be provided at any position between the fuel container (8) and the dosing device (10). The sensor device (24) can also be located within the fuel container (8) or within the dosing device (10).

In a first model, the ambient temperature is replaced by the temperature of the fuel container to determine the dosing time. This is particularly advantageous if a warm fuel container is used in a cold application device. If a warm fuel container is used in a cold application device, the supply can be correctly quantified by considering the actual fuel temperature. The device thus applied can also be operated directly from a warm fuel container without supplying too much fuel.

In a second model, the fuel container pressure is measured in place of the ambient temperature. In addition to this, the second model is identical to the first model.

In a third model, the fuel temperature is used instead of the ambient temperature to determine the dosing time. In addition to this, the third model is identical to the first model.

In a fourth model, the quantitative supply time is not corrected using the fuel container fullness state. The quantitative supply time is determined using the fuel container pressure and the fuel temperature. In addition to this, the fourth model is identical to the first model.

(1)‧‧‧Applying appliances

(2) ‧‧‧shell

(4)‧‧‧Hands

(5) ‧‧‧Applying end

(6) ‧ ‧ 匣 匣

(8) ‧‧‧fuel containers

(10) ‧ ‧ Quantitative supply devices

(11)‧‧‧Connecting lines

(12)‧‧‧fuel room (combustion space)

(14)‧‧‧Ignition device

(16)‧‧‧ Trigger

(18) ‧‧‧Pistons

(19)‧‧‧Ignition wires

(20)‧‧‧Control device (control unit)

(21)‧‧‧ (detection of ambient temperature) sensor device

(22)‧‧‧ (detection of ambient pressure) sensor device

(24)‧‧‧Sensor device

(25)‧‧‧Sensor device

(26)‧‧‧Sensor device

(28)‧‧‧RFID tags

Claims (10)

A method for controlling an injection process in an application device for fuel operation, the application device (1) comprising a fuel container (8) having a fuel container temperature and wherein is a fuel container pressure The fuel is sent from the fuel container (8) to a combustion chamber (12) via a time-controlled quantitative supply device (10), in which a fuel chamber temperature is characterized in that: A characteristic field is determined or corrected using parameters other than ambient temperature or using the parameter and the ambient temperature. The method of claim 1, wherein the quantitative supply time is corrected using the fuel container temperature. The method of claim 1, wherein the fuel container pressure is used to determine or correct the quantitative supply time. The method of claim 1, wherein the fuel temperature is used to determine or correct the quantitative supply time. The method of claim 1, wherein the fuel container pressure and the fuel temperature are used to determine or correct the quantitative supply time. A method according to any one of the preceding claims, wherein the fuel container is additionally used to find or correct the quantitative supply time. A method according to any one of the preceding claims, wherein the fuel type is additionally used to determine or correct the quantitative supply time. A method according to any one of the preceding claims, wherein the determined set supply time is corrected for the effect of ambient pressure. A method according to any one of the preceding claims, wherein the determined quantitative supply time is corrected for the state of fullness of the fuel container. A system for injecting a process in an applicator for controlling the operation of a liquid fuel, for use in a method of practicing the scope of any of the preceding claims.