DE7924969U1 - DEVICE FOR DISPLAYING THE CURRENT FUEL CONSUMPTION OF A VEHICLE - Google Patents

Description

UDO Adolf Schindling AG GGOD Frankfurt / Main

Graefstrasse 103

Device for displaying the current fuel consumption of a motor vehicle

The invention relates to a device for displaying the instantaneous fuel consumption of a motor vehicle a gasoline engine, with a pressure measuring mechanism, in particular one Tubular spring valve connected to the intake manifold of the engine is, and means for switching the pressure measuring mechanism into direct operation.

To display the current fuel consumption, an input |

direction with einEm Druckmeßwerk known, with which the suction {;

negative pressure occurring in the pipe and measured as consumption per time |

unit is displayed. However, since a display Jf

of the consumption per lying distance unit, for example | Liters per hundred kilometers, if desired, this on the couch

Distance-related consumption, however, when only the negative pressure is measured in the intake pipe of the selected gear ratio, i.e. depending on the gear currently engaged, it has already been proposed that different gears be different Provide scalings on the scale of the display device. The disadvantage here is that, on the one hand, due to the multiple scaling and on the other hand, readability due to the briefly high consumption values in the lower aisles

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the display instrument leaves much to be desired, the display instrument in particular not quickly, with a A quick glance is a requirement that is indispensable in automotive instrumentation. 5

To eliminate this disadvantage it has been proposed that to connect the pressure measuring unit via a shut-off valve to the suction pipe and this shut-off valve when inserting the direct gear to open and when switching back from the

1G direct corridor to close one of the lower corridors, so that there is a consumption display only in the direct gear and a scaling is only provided for this gear must become. Such a mechanical one via the gear selector lever actuatable shut-off valve is, however, relatively expensive, can only be assembled with considerable effort and brings about it also has the disadvantage that after actuation of the shut-off valve a relatively large time delay up to is available for the display to appear, all the more so if, as is generally the case, in the connecting piece of the pressure measuring mechanism is a throttle for damping the display means. It must then namely the pressure chamber of the pressure measuring mechanism, for example the interior of the Tubular spring, and those adjoining it up to the shut-off valve Line runs are brought to negative pressure via the throttle.

These disadvantages of the known fuel consumption display devices are intended to be overcome by the invention. It is therefore the task of _; The invention of creating a display device 3D of the type described at the beginning, in which a display appears after the pressure measuring device has been activated without any significant time delay. In addition, the device should be as cheap and quick and easy to assemble in the vehicle as possible.

This object is achieved based on a device of the type described in the invention in that the pressure chamber of the pressure gauge is directly or indirectly connected to a ventilation opening and a hinged armature relay is present, the armature of which interacts with εΐπεπι closure element for the ventilation opening and its excitation winding together with a the switch, which is connected directly to the operating voltage, forms a circuit.
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By arranging a closable ventilation opening in ΒεΓεϊοΙι the pressure chamber is achieved that when actuated

of the encryption element without an annoying time delay The display in the display device appears or disappears, since the entire UπteΓdΓuckΞ \ / stεm up to the point of the opening is under negative pressure even when the closure element is open. As soon as the closure then closes the opening,

a is only the pressure chamber or, in the case of a tubular spring

manometer to bring the interior of the spring to negative pressure, which is fast compared to the small volume of these spaces happens. Furthermore, such an arrangement of the lockable Opening achieved a particularly easy-to-assemble structure, but only a single pipe is from the To lay the intake pipe to the display device and an electrical line from the hinged armature relay to the gear selector lever. As commercial Folding armature relays can be used, the measures according to the invention can be implemented with extremely little effort Realize »

With εϊπεγ display device with a throttle in the vacuum system, As already mentioned, particularly short time delay words can be set between the insertion of the direct and the appearance of the advertisement on the display device when the throttle is close to the ventilation opening

on the negative pressure side part of the negative pressure system is arranged. In addition, there is inventive genius at εϊπεγ established facility now the possibility of a Use a throttle with a particularly small effective cross-section to be able to. It has proven to be particularly useful to build such a choke from two sintered chokes arranged at a distance from one another, between which one another a quartz sand filling of a defined volume is found. This enables optimal display damping to be achieved.

According to one embodiment of the invention, the closure element designed for the ventilation opening in the form of a pin, which is stored in a brace which penetrates the exciter winding core and which is turned away from the armature on its side End carries a closure body. Such a structure and such a storage of the closure element also meet the highest demands with regard to insensitivity to shearing and locking security.

According to another advantageous embodiment, the carries Anchor at its end of the fulcrum away from the pivot point with the closure body. Such an embodiment is special Can be implemented cheaply, but does not have the insensitivity to shearing and switching reliability uie the previously described Embodiment, so that it will have to be decided on a case-by-case basis which of the two embodiments for the Carry comes.

In the case of a display device with a tubular spring pressure gauge is at its most angular as a ventilation opening in the nozzle of the Tubular spring manometer has a bore opening into the pressure channel VARGESEn and is the Hiappank relay directly on the nozzle attached. This results in a particularly compact, inexpensive structure with few components.

The invention is based on the drawing, which is in part schiatic Representation contains exemplary embodiments, explained in more detail. Show it

Figure 1 is an overall view of the display device

and

Figure 2 shows a detail of Figure 1 in a partially cut Side view.

The device for displaying the instantaneous fuel consumption of a motor vehicle contains, as can be seen from FIG Is a tubular spring pressure gauge 1 with a scale 2 to display the consumption in liters per hundred kilometers.

The tubular spring manometer 1 has a stub h protruding from the housing 3 with a threaded attachment 5 with which the manometer can be screwed into a corresponding Geujindebore in a holder 6 or the dashboard. The tubular spring 7 is soldered into the part of the threaded connector k located in the housing 3. The other end of the tubular spring 7 is connected via a connecting rod B to the pointer actuator 9, the plates of which are attached to the connector k. The pointer 10 sits on the pointer shaft of the pointer mechanism 9. The other end of the connector h is connected via a flexible hose line 11 to a connector 12 which is located on the intake pipe 13 of the motor vehicle engine.

In the side wall of the "* · connecting piece h, which is opposite the tubular spring, there is a ventilation hole 1 *» which can be closed or released by means of a closure element 15. The closure element 15 is actuated by a hinged armature relay 16, which consists of a jach 17 with an excitation coil 19 seated on a core 1B and a hinged armature 20, which by means of

a spring 21 is held in a rest position. The hern is provided with a bore 22 through which the closure element 15 protrudes and in which the closure element 15 is guided is. On its side facing away from the ventilation hole 14 the UerschluBelement 15 is attached to the anchor 2D.

The excitation coil 19 is connected to the vehicle battery 25 via a two-wire line 23 and a pushbutton switch 24 Connection. The switch 24 is in the range of the gear selector lever 2G so arranged that when a direct gear is engaged via the gear selector lever 26, the switch 24 closes operated uiird. This has a current flow through the field winding 19 result, which is why the relay is energized and the armature 20 is attracted. This makes the usually unlocked Opening 14 closed and the negative pressure in the suction pipe 13 and the hose line 11 can also be in of the Bourdon tube. This is deflected accordingly and pivoted via the pointer mechanism 9 into the pointer 1D position corresponding to the negative pressure. As soon as the gear selector lever 26 from its position corresponding to the direct gear, for example by downshifting to one other gear, is removed, the switch 24 is operated in the sense of opening, whereby the clapper armature relay 16 is de-excited. The hinged armature 20 is therefore folded into its rest position by the spring and at the same time pulls the Enclosure element 15 in the position shown in Figure 2, in which the ventilation hole 14 via the channel 27 with the environment connected is. In this position of the closure element 15, no negative pressure can build up in the Röryrenfeder, which is why this and the pointer 1D are in their rest position. There is then no longer any consumption display.

As can be seen in particular from Figure 2, near the ventilation opening 14 is a throttle 28 in the nozzle 4 of the tubular

spring manometer 1 arranged, which consists of two sintered chokes 29 and 3G and a quartz sand filling between them of a defined volume.

Claims (5)

claims 1. Device for displaying the current fuel consumption of a motor vehicle with a gasoline engine, with a pressure gauge, in particular a tubular holiday manometer, which is connected to the intake pipe of the engine, and means for switching the pressure gauge in direct gear, characterized in that the pressure chamber (7) of the pressure gauge is directly or indirectly connected to a ventilation opening (14) and pin hinged armature relay (16) is available, des- 1G sen anchor (2D) with a l / closure element (15) for the Ventilation opening (14) interacts and its excitation winding (19) together with a switch (24) which puts this in direct gear to an operating voltage (25) forms a current circle. 15th 2. Device according to claim 1 with a throttle in the negative pressure system, characterized in that the throttle (2B) is arranged near the ventilation opening (14) on the negative pressure side part of the negative pressure »/ stems. 2D 3. Device according to claim 2, characterized in that the throttle (2B) consists of two spaced-apart BinterdrDsseln (29, 3D), between which there is a quartz sand filling (31) of a defined volume. 25th 4. Device according to one of claims 1 to 3, characterized in that the closure element (15) for the ventilation opening (14) is designed in the form of a pin which penetrates the excitation core (1B) in one 3D bore (22) is mounted and on its the anchor (20) from Bj facing end carries a closure body. • · 5. Device according to one of claims 1 to 3, characterized in that the armature (20) carries at its end remote from the pivot point an approach with the l / closure body.
5 G. Device according to one of claims 1 to 5, with a Röhrenfedermanometer, characterized in that an opening into the pressure channel bore (14) is provided as the ventilation opening in the connecting piece (14) of the Röhrsnfedermanometers (1) and the hinged armature relay C 16) on the connecting piece (4) is attached.