DE1959567A1 - Time switch device, in particular safety switch device for additional heaters in motor vehicles - Google Patents
Time switch device, in particular safety switch device for additional heaters in motor vehiclesInfo
- Publication number
- DE1959567A1 DE1959567A1 DE19691959567 DE1959567A DE1959567A1 DE 1959567 A1 DE1959567 A1 DE 1959567A1 DE 19691959567 DE19691959567 DE 19691959567 DE 1959567 A DE1959567 A DE 1959567A DE 1959567 A1 DE1959567 A1 DE 1959567A1
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- switch device
- time
- resistor
- motor vehicles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
- B60H1/2206—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners controlling the operation of burners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/2231—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters for proper or safe operation of the heater
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/2237—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters supplementary heating, e.g. during stop and go of a vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/224—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters automatic operation, e.g. control circuits or methods
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Direct Current Motors (AREA)
- Relay Circuits (AREA)
- Electronic Switches (AREA)
Description
Beschreibung zur Patentanmeldung: n Zeitschalteinrichtung, insbesondere Sicherheitsschalteinrichtung für Zusatzheizungen in Kraftfahrzeugen" Es sind bereits Zeitschalteinrichtungen bekanntgeworden, die aus einer mit einem RC-Glied versehenen Brückenschaltung mit einem nachgeschalteten aus Transistoren aufgebauten Verstärker bestehen. Zum Ein- bzw. Ausschalten von Verbrauchern mit größerer Stromaufnahme ist ein Schaltrelais notwendig, das nur dann von dem letzten als Leistungsendstufe dienenden Transistor geschaltet werden kann, wenn vorher genügend Verstärkerstufen vorgeschaltet sind. Description of the patent application: n time switch device, in particular Safety switching device for additional heaters in motor vehicles "There are already Time switching devices have become known, which consist of a provided with an RC element Bridge circuit with a downstream amplifier made up of transistors exist. For switching consumers with higher power consumption on and off a switching relay is necessary, which is only used by the last one as a power output stage Serving transistor can be switched if there are enough amplifier stages beforehand are connected upstream.
Es ist Ziei der Erfindung, mit möglichst geringem Aufwand auszukommen, und die Zahl der Transistorstufen zu verringern. Ein weiteres Ziel der Erfindung ist darin zu sehen, daß die Zeitschalteinrichtung an die Verhältnisse in einem Kraftfahrzeug angepaßt wird und somit als Sicherheitsschalteinrichtung für Zusatzheizungen im Kraftfahrzeug dienen kann. Ferner soll fur eine steile Schaltkennlinie gesorgt werden, die ein definiertes Schaltverhalten begünstigt.It is the aim of the invention to get by with the least possible effort, and to reduce the number of transistor stages. Another object of the invention can be seen in the fact that the time switch device to the conditions in a motor vehicle is adapted and thus as a safety switching device for additional heaters in Motor vehicle can serve. Furthermore, a steep switching characteristic should be ensured, which favors a defined switching behavior.
Die Erfindung bezieht sich deshalb auf eine Zeitschalteinrichtung, insbesondere Sicherheitsschalteinrichtung für Zusatzheizungen in Kraftfahrzeugen zum Abschalten der Anlage nach einer vorgogebenen Zeit bei Nichteinschalten der Zündung, bei der eine mit einem RC-Glied versehene Brückenschaltung mit nachgeschaltetem aus Transistoren aufgebauten Verstärker als zeitbestimmendes Glied dient. Sie ist erfindungsgemäß dadurch gekennzeichnet, daß im Emitterstromkreis des als Leistungsendstufe dienenden Transistors ein Widerstand angeordnet ist, und daß der aus zwei ohmschen Widerständen aufgebaute Spannuagsteiler der Brückenschaltung an den Verbindungspunkt dieses Widerstandes mit dem Emitter des Transistors angeschlossen ist. Mit der erfindungsgemäßen Zeitschalteinrichtung ist es z. B. möglich, lediglich mit zwei Transistoren auszukommen und damit die Anzahl der Bauelemente gegenüber bekannten Schaltungen erheblich zu vermindern.The invention therefore relates to a time switch device, in particular safety switching device for additional heaters in motor vehicles to switch off the system after a preset level Time if not switched on the ignition, in which a bridge circuit provided with an RC element is followed by a An amplifier made up of transistors serves as a time-determining element. she is according to the invention characterized in that in the emitter circuit as a power output stage serving transistor, a resistor is arranged, and that of two ohmic Resistors built up voltage divider of the bridge circuit to the connection point this resistor is connected to the emitter of the transistor. With the invention Time switch, it is z. B. possible to get by with only two transistors and thus the number of components compared to known circuits increases considerably Reduce.
Anhand eines Ausführungsbeispiels, das in der Zeichnung dargestellt ist, soll die Erfindung in ihren Einzelheiten näher erläutert werden.Using an exemplary embodiment that is shown in the drawing is, the invention will be explained in more detail.
Das RC-Glied besteht aus dem Widerstand R1 und dem Kondensator Cl. Die WiderständeR2 und R3 bilden einen Spannungsteiler, der bei den bekannten Schaltungen an dem positiven und dem negativen Pol der Speisespannung angeschlossen ist. Die Basis des Transistors Ti ist über eine Diode Dl mit dem Verbindungspunkt zwischen dem Widerstand R1 und dem Kondensator C1 verbunden. Der Spannungsteilerpunkt P ist mit dem Emitter des Transistors Tl verbunden. Der Kollektor des Transistors T1 ist über den Widerstand R4 mit der Basis des Transistors T2 verbunden, in dessen Kollektorstromkreis die Wicklung ReL liegt. Gemäß der Erfindung ist im Emitterstromkreis des Transistors T2 ein Widerstand R5 angeordnet. Der aus den Widerständen R2 und R3 bestehende Spannungsteiler ist mit dem Verbindungspunkt des Emitters des Transistors T2 mit dem Widerstand R5 verbunden.The RC element consists of the resistor R1 and the capacitor C1. The resistors R2 and R3 form a voltage divider, which in the known circuits is connected to the positive and the negative pole of the supply voltage. the Base of the transistor Ti is via a diode Dl with the connection point between connected to resistor R1 and capacitor C1. The voltage divider point P is connected to the emitter of the transistor Tl. The collector of transistor T1 is connected via the resistor R4 to the base of the transistor T2, in its collector circuit the winding ReL lies. According to the invention is in the emitter circuit of the transistor T2, a resistor R5 is arranged. The one from the resistors R2 and R3's existing voltage divider is connected to the connection point of the emitter of the transistor T2 connected to resistor R5.
Die Transistoren T1 und T2 sind Komplementärtransistoren.The transistors T1 and T2 are complementary transistors.
Zwischen der Basis des pnp-Transistors T1 und dem Kollektor des npn-Transistors TZ ist eine Diode D2 mit Durchlaßrichtung vom Emitter des Transistors T1 zum Transistor T2 angeordnet.Between the base of the pnp transistor T1 and the collector of the npn transistor TZ is a diode D2 with the forward direction from the emitter of the transistor T1 to the transistor T2 arranged.
In diesem Leitungszug befindet sich auch ein Widerstand R6.There is also a resistor R6 in this cable run.
Der Kondensator C2, der die Basis des Transistors T1 mit dem einen Pol der Speisespannung verbindet und die Diode D3, die die Relaiswicklung Rel überbrückt, dienen zur Entstörung des Gesamtgeräts.The capacitor C2, which connects the base of the transistor T1 to the one Pole of the supply voltage connects and the diode D3, which bridges the relay winding Rel, serve to suppress interference in the entire device.
Wird das Gerät an Spannung gelegt, z. B. beim Einschalten einer Kraftfahrzeugzusatzheizeinrichtung, so wird der Kondensator C1 über den Widerstand R1 aufgeladen. Nach Überschreitung der Schwellspannung fließt durch den Widerstand R1 und die anliegende Spannung bedingt ein Basisstrom durch den ersten Transistor TI. Durch den zunächst kleinen Kollektorstrom im Transistor T2 fällt am Widerstand R5 bei nur schwacher Ansteuerung des Transistors T1 eine diesem Strom proportionale Spannung ab. Dadurch wird die am Widerstand R2 liegende Spannungsschweile abgelenkt. Infolgedessen tritt am Kondensator C1 sozusagen eine oberspannung auf. Es fließt deshalb ein stärkerer Basisstrom in den Transistor T1. Durch den Widerstand R2 wird in zweifacher weise, namlich durch den Basis-Emitterstrom und zum anderen den Emitter-Kollektorstrom des Transistors Ti, eine Begrenzung bewirkt.If the device is connected to voltage, e.g. B. when switching on an additional motor vehicle heater, so the capacitor C1 is charged via the resistor R1. After exceeding the threshold voltage flows through the resistor R1 and the applied voltage is conditional a base current through the first transistor TI. Due to the initially small collector current in transistor T2 drops across resistor R5 when the transistor is only weakly driven T1 from a voltage proportional to this current. Thereby the resistor R2 lying tension distracted. As a result, the capacitor C1 occurs, so to speak an overvoltage. A stronger base current therefore flows into the transistor T1. Resistance R2 is used in two ways, namely through the base-emitter current and on the other hand, the emitter-collector current of the transistor Ti causes a limitation.
Die Diode D2 unterstützt und beschleunigt den Schaltvorgang, indem sie einen Stromfluß in ihrer Durchlaßrichtung gestattet.The diode D2 supports and accelerates the switching process by it allows current to flow in its forward direction.
Ferner sorgt die Diode D2 für eine elektronische Selbsthaltung der Schaltung. Es kann deshalb z. B. in Kraftfahrzeugheizungsanlagen ein Selbsthaltekontakt am Relais eingespart werden.Furthermore, the diode D2 ensures electronic self-retention of the Circuit. It can therefore, for. B. a self-holding contact in automotive heating systems can be saved on the relay.
Der Kondensator C2 verhindert ein Durchschalten der Transistoren beim Anlegen der Betriebsspannung, Ferner wirkt er integrierend auf Störimpulse. Die gesamte Schaltung kann sehr niederohmig ausgelegt werden. Durch diese Auslegung und die geringe Verstärkung ist sie verhältnismäßig unempfindlich gegen Störspannungen und dadurch besonders geeignet für den Betrieb im Kraftfahrzeug.The capacitor C2 prevents the transistors from switching on during Applying the operating voltage, it also has an integrating effect on interference pulses. the The entire circuit can be designed with a very low resistance. Through this interpretation and the low gain makes it relatively insensitive to interference voltages and therefore particularly suitable for use in motor vehicles.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691959567 DE1959567C3 (en) | 1969-11-27 | 1969-11-27 | Time switch device, in particular safety switch device for additional heaters in motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691959567 DE1959567C3 (en) | 1969-11-27 | 1969-11-27 | Time switch device, in particular safety switch device for additional heaters in motor vehicles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE1959567A1 true DE1959567A1 (en) | 1971-06-03 |
| DE1959567B2 DE1959567B2 (en) | 1978-06-01 |
| DE1959567C3 DE1959567C3 (en) | 1979-01-25 |
Family
ID=5752241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691959567 Expired DE1959567C3 (en) | 1969-11-27 | 1969-11-27 | Time switch device, in particular safety switch device for additional heaters in motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1959567C3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2548599A1 (en) * | 1983-07-06 | 1985-01-11 | Fortschritt Veb K | Programmable solid state circuit start control for IC engine |
-
1969
- 1969-11-27 DE DE19691959567 patent/DE1959567C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2548599A1 (en) * | 1983-07-06 | 1985-01-11 | Fortschritt Veb K | Programmable solid state circuit start control for IC engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1959567B2 (en) | 1978-06-01 |
| DE1959567C3 (en) | 1979-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| EHJ | Ceased/non-payment of the annual fee |