EP3015682A1 - Throttle device for a combustion engine and motorcycle with same - Google Patents

Abstract

A throttle valve device (1) for an internal combustion engine (8) is proposed, having a housing (3) and a suction pipe (7) having a flow cross section and a throttle flap (6) pivotable relative to the flow cross section, which can be actuated by means of a throttle valve shaft (5) and with an adjusting device (2) arranged on the housing (3), by means of which the throttle flap (6) can be releasably fixed in a cold starting position which at least partially releases the throughflow cross section.

Description

The present invention relates to a throttle valve device for an internal combustion engine, having a housing and a flow cross-section having a suction pipe and a relative to the flow cross-section pivotable throttle valve, which is actuated by means of a throttle shaft, according to the preamble of claim 1.

Such a throttle valve device can serve for metered delivery of a fuel-air mixture to an internal combustion engine, which is supplied, for example via an electronic device, to the respective throttle valve in accordance with fuel supplied to the intake manifold, which is then supplied to the internal combustion engine. In such, working with intake manifold internal combustion engine is thus discharged via the throttle valve from the internal combustion engine Performance controlled by the supplied amount of fuel mixture is influenced by means of the throttle by the freely flowable cross section in the intake manifold is changed by the angular position of the throttle valve relative to the flow area.

In an internal combustion engine with injection of the fuel directly into a working cylinder of the internal combustion engine, the amount of combustion air supplied to the internal combustion engine is influenced via the throttle valve, again via a change in the angular position of the throttle valve relative to the flow cross section in the intake manifold.

If a not yet normal operating temperature having engine started, the output from the engine to bring about a stable idling power is higher than at normal operating temperature, since in the cold state, the friction torque of the internal combustion engine is higher than in the warm operating condition. This can be compensated with an increased idling speed of the internal combustion engine in cold start operation.

In a conventional internal combustion engine operating with a carburettor for fuel atomization, the fuel-air mixture has been enriched for this purpose by throttling the amount of intake air to be supplied via the main intake air passage.

Based on DE 79 08 299 U1 is a self-resetting starting carburetor to a main carburetor known, in which for initiating the startup a start slider is moved by means of an operating part in a raised position and the starting slider is held by a pawl in this position until after completion of the startup of the user Motors by one first actuation of the main throttle valve sets the main carburetor in function and thus the starting carburetor is automatically put out of service.

Based on DE 39 26 424 A1 is known a throttle valve for an internal combustion engine, which is actuated by an electric motor. If an emergency is detected by an electric motor driving the control device, in which the throttle could close to an opening angle of 0 degrees, the engine would therefore no longer be supplied with fuel air mixture, the throttle valve via a stop pin by a hydraulically actuated stop plate is extended, held in an open position, so that the internal combustion engine can continue to be supplied with a fuel-air mixture and thus idling of the internal combustion engine is ensured.

Based on US 2006/0005808 A1 has become known a throttle for a motorcycle, which is operated by the user of the motorcycle via a cable. In addition to the cable operation, the throttle may also be actuated by an electrically driven actuator that overrides manual operation of the throttle when an electronic control device of the motorcycle detects that the motorcycle is in a specific operating mode. The special mode of operation may be a passing mode of the motorcycle in which it is accelerated with a predetermined acceleration for measuring the noise of the motorcycle. In such a state, the electrically driven actuator then reduces the opening angle of the throttle valve to reduce the power output from the engine of the motorcycle and thus reduce the noise emissions.

In particular, in competitive motorcycles, it is important to keep the net mass of the vehicle low, which is why such vehicles are often equipped with a cable-operated throttle, so an electric motor for actuation the throttle is omitted. In a known fuel-injected motorcycle with cable-operated throttle, a bypass system for the cold start operation of the internal combustion engine is provided and the bypass can be opened or closed by the driver of the motorcycle for cold start operation.

However, this system has the disadvantage that the idle control via the bypass, the MAP (manifold pressure signal) sensor signal is corrupted and provided for the control of the internal combustion engine electronic control unit (ECU, engine control unit) uses the falsified sensor signal for the determination of the amount of fuel to be injected , Also, the ECU can not detect the change of the idling air made by the driver and provides a constant amount of fuel although more or less idle air is supplied through the bypass. As a result, the raw exhaust gas values of the internal combustion engine increase and stable idling in the cold start operation is not achieved.

When the fuel injection system is operated in cold start mode, the bypass is open so that when the throttle valve is opened, the negative pressure in the bypass decreases, reducing the flow of air through the bypass and creating a difficult-to-tune transition area, causing the throttle body to swell Responsibility of the internal combustion engine deteriorates and differs from the response at low-operating internal combustion engine. This in turn means that the driver, who expects a spontaneous and stable response of the internal combustion engine, often keeps the engine warm while stationary and with targeted gas shocks until it has reached normal operating temperature.

Proceeding from this, the object of the present invention is to provide a throttle valve device which avoids these disadvantages and provides a cold start system that is easy to operate for the driver. Also, an internal combustion engine and providing a motorcycle with the throttle device to be created.

The invention has to solve this problem with respect to the throttle device on the features specified in claim 1. Advantageous embodiments thereof are described in the further claims. In addition, the invention with respect to the internal combustion engine has the features specified in claim 15 and in terms of the motorcycle on the features specified in claim 16.

The invention provides a throttle valve device for an internal combustion engine having a housing and a flow cross-section having a suction pipe and a pivotable relative to the flow throttle, which is actuated by means of a throttle shaft and a housing arranged on the adjusting device, by means of which the throttle in a flow cross-section at least partially free giving cold start position releasably fixed.

The internal combustion engine can be, for example, a single-cylinder motorcycle engine, which is provided for driving a competition motorcycle, for example an off-road motorbike. Irrespective of this, the throttle valve device according to the invention can also be used in single-cylinder or multi-cylinder internal combustion engines of other vehicles. The internal combustion engine may be an internal combustion engine operating with direct fuel injection or port injection, and may also be an internal combustion engine operated with supercharging. Although it is spoken of the intake manifold, this also includes the case that the internal combustion engine is operated with charge.

The throttle valve device according to the invention generally has a housing which is designed for receiving or arranging conventional components of a throttle valve device, such as a throttle valve shaft, and also, for example, a device with which the actuation force exerted by the driver is transmitted to the throttle valve shaft. The throttle valve device according to the invention also has a, for example, in the intake manifold pivotally mounted throttle valve, with which the flow cross-section of the suction pipe can be changed. The throttle valve device according to the invention has an actuating device, by means of which the throttle valve in a the flow cross-section at least partially released releasing cold start position is releasably fixed. The cold start position of the throttle valve is a flow cross section in a suitable for the cold start operation of the provided with the throttle device according to the invention engine free position.

It may therefore be a position of the throttle in the cold start position, which further opens or opens the flow cross section of the intake manifold as the position of the throttle valve, which is necessary for the idling operation of the internal combustion engine in the warm operating condition. With the throttle further opened, more internal combustion air is supplied to the internal combustion engine than is necessary during idling operation in the operating-warm state. This condition is detected by a sensor which cooperates with the ECU, which releases an appropriate amount of fuel stored for example in a map for injection.

By the adjusting device thus formed between the throttle valve and the intake throttle throttle gap is increased, so that the internal combustion engine for the cold start a larger amount of combustion air can be supplied, as is necessary for the idling operation in the warm operating condition. This is the need to an idle air bypass system, as explained above has been omitted.

The actuator can be easily accessed by the driver of the vehicle before the start of the cold start operation, so that the throttle gap is already increased in the cold start process and in the intake manifold forms a negative pressure, which is detected by a sensor and forwarded to the ECU, the then releases a slightly increased amount of fuel for injection compared to the idling mode in the warm operating condition, thereby establishing a stable cold start idle that is not affected by changing negative pressure values in a bypass system.

If the driver of the vehicle operated with the throttle device according to the invention performs a starting process, he increases this, the throttle gap by accelerating the gas grip or accelerator slightly further, the pressure conditions in the intake manifold change and the ECU can release these changed conditions corresponding modified fuel quantity for injection. The hard-to-tune transition region described above has been eliminated, since the opening of the throttle valve by the driver, the negative pressure conditions in the idle air bypass system can not change, since it has fallen into elimination. The thus operated engine immediately has a responsiveness to the driver's request, without the driver having to make use of his behavior to bring the cold engine in operation operation to operating temperature. Since even in cold start mode falsified intake manifold signals are not present from a bypass system, the raw emissions of the internal combustion engine can be reduced, the environment is relieved.

According to a development of the invention it is provided that the throttle valve shaft actuated by means of at least one cable in the opening direction of the throttle valve is and the cable is arranged in operative connection with a housing arranged in the cable drum, which is coupled to the throttle shaft. This configuration has the advantage that the cable drum is protected against damage and dirt due to, for example, stones, dust, dirt particles and the like stirred up by the front wheel of the motorcycle.

It is also provided according to a development of the invention that the throttle shaft is actuated by means of at least one cable in the closing direction of the throttle and the cable is arranged in operative connection with a housing arranged in the cable drum, which is coupled to the throttle shaft. In this cable drum for the closing cable can be an independent, with the throttle valve shaft in operative connection cable drum, which is provided independently of the cable drum for the opening cable. It is also possible that both the opening cable and the closing cable actuate a common cable drum, which is in operative connection with the throttle shaft and thus the throttle can be both actively opened and actively closed by the driver of the vehicle and indeed with the aid of the corresponding cable. This configuration also has the advantage that the throttle valve to be opened against the action of a return spring can be actively closed again by the driver of the vehicle even in the event of a malfunction of the return spring.

It is provided according to a development of the invention that the adjusting device is designed for manual actuation for bringing about the flow cross-section at least partially released cold start position of the throttle valve and to cancel this position. In other words, it means that the driver of the vehicle can easily manually activate the actuator before the cold start operation without complex electronic control devices or the like, so that the throttle valve assumes its cold start position and the actuator again manually disable directly on the actuator or by mechanical remote access to the actuator, that can return from their cold start position in the position for the warm engine.

According to an advantageous embodiment, it is provided that the adjusting device is designed to cancel the flow cross-section at least partially released cold start position of the throttle valve by means of an operation by a cable. This configuration is a possibility of remote access or remote control of the throttle from the cold start position by the driver of the vehicle. It can be provided on the vehicle for the deactivation of the cold start position of the throttle and a separate, so separate cable.

It is provided according to a development of the invention that the adjusting means by means of a cable for actuating the throttle valve in the closing direction from the flow cross-section at least partially released releasing actuated cold start position of the throttle valve in one of the actuator unactuated position of the throttle can be brought. It means in other words that the driver of the vehicle can cancel the cold start position of the throttle just by pressing the cable for the operation of the throttle in the closing direction, so for example in a provided on a motorcycle throttle grip the throttle grip in the forward direction, that is, in the closing direction of the throttle rotates, whereby the actuator is moved out of its throttle position in the cold start position or position and to a throttle valve no longer in the cold start position holding position, whereby the enlarged in cold start position throttle gap in the intake manifold is reduced.

Thus, the driver of the vehicle equipped with the throttle device according to the invention activates the control device for a cold start of the internal combustion engine, by manually actuating them, which results in increasing the throttle gap in the intake manifold by pivoting the throttle a predetermined amount of rotation and then allowing the driver to perform the cold start as usual, the engine immediately decays to a stable idle and the driver can Use the motorcycle as usual and then, for example, during a short life or even at a phase in which the engine is in overrun, the throttle grip in the closing direction of the throttle actuate, ie during the pushing operation by a small amount of rotational angle in the forward direction so that the actuator is deactivated and the cold start position of the throttle is released.

The driver of the motorcycle no longer has to handle any existing cold start device on the housing of the throttle device for deactivating the cold start device by direct manual operation of the cold start device on the housing of the throttle valve, resulting in an engine that has already reached operating temperature due to the heat emission of the engine and / or in the region of the engine and a throttle device running exhaust pipes brings with it the danger that the driver burns his hand or fingers. The throttle valve device according to the invention thus also ensures a considerable gain in comfort for the driver. The throttle valve device according to the invention is characterized by a simple structure.

It is provided according to a development of the invention that the adjusting device comprises a spring device and a against the action of the spring device axially displaceable setting pin which can be brought into abutment with a trained on the cable drum stop in such a way that the throttle valve to bring about a predetermined rotation angle the flow cross-section at least partially releasing actuated cold start position of the throttle is pivotable.

When the driver of the vehicle equipped with the throttle device according to the invention wants to perform a cold start of the internal combustion engine, he only has to move the adjusting pin axially by a predetermined distance so that the axial displacement causes one end portion of the actuating pin formed with a formed on the cable drum stop in Plant comes and a further axial displacement of the adjusting pin, preferably until it has taken a detent position, causes the cable drum is rotated by a predetermined angle of rotation and the rotational movement of the cable drum is transmitted via the throttle shaft to the throttle, so that the throttle gap in the intake manifold is increased in accordance with the air requirement of the internal combustion engine in cold start operation.

The rotational movement of the cable drum to bring about the required for the cold start throttle gap in the intake manifold is transmitted via the cable for the closing movement of the throttle on the throttle grip of the motorcycle, so that it is automatically rotated in a rotational position corresponding to a slightly open throttle position and thus a for the closing operation of the throttle valve for deactivation of the adjusting device and thus deactivation of the cold start position of the throttle sufficient retraction angle is brought about on the throttle grip, without the driver must make interventions on the motorcycle.

It is also provided according to a development of the invention that the actuating device has latching means which releasably fix the actuating device in the flow cross-section at least partially released actuated cold start position of the throttle. The locking means ensure that the cold start position of the throttle is maintained until the driver of the vehicle deactivates the actuator and thus the cold start position of the throttle by the throttle grip against the action of the locking means in the direction of the closing direction Throttle operated, so that the locking means release from the detent position and thus the spring-loaded actuating pin springs back to its original position in which it is no longer in contact with the stop of the cable drum.

It is provided according to a development of the invention that the adjusting device has a sleeve-shaped body formed with an inner recess, which is designed to receive the adjusting pin and the adjusting pin is arranged along a first longitudinal section in a holder formed with an inner recess. This configuration ensures that a relative displacement of the actuating pin relative to the holder is possible, so that the engageable with the stop on the cable drum end portion of the actuating pin is adjustable in its distance relative to the stop and consequently a displacement movement of the holder by a predetermined displacement path in Dependence of said distance leads to a change in the caused by the displacement movement of the holder rotation angle of the cable drum.

With this configuration, the cold start position rotation angle of the throttle valve achievable by the operation of the actuator can be engine-specifically changed. With this configuration, a standardized adjusting device can be adapted to different internal combustion engines showing cold start behavior.

It is provided according to a development of the invention that the holder is received in the inner recess of the sleeve-shaped body relative to this axially displaceable and on the outer circumference has a recess which is releasable with a formed on the inner circumference of the sleeve-shaped body bulge for bringing about a locking position of the actuating device Intervention can be brought. In this way, the above-mentioned latching means can be realized inexpensively, so for example, the holder and the sleeve-shaped body can be each formed of a plastic material and an axial displacement of the holder and so that the adjusting pin causes the indentation of the holder comes to lie in the bulge of the sleeve-shaped body and thus a detent position between the two components and thus the adjusting device can be implemented.

It is also provided according to a development of the invention that the adjusting pin in the region of an actuating button facing end portion has a threaded portion along which the adjusting pin is rotatable and axially displaceable relative to the provided with a corresponding threaded portion holder such that a from a housing portion of Actuator out projecting end portion or engagement portion, which is engageable with the stop of the cable drum in Appendix, with respect to the outstanding length of the end portion is changeable. In this way, the adjusting device for throttle valve devices of different internal combustion engines can be used with different cold start behavior, as has already been mentioned above.

It is also possible according to a development of the invention and alternative embodiment that the adjusting pin has a tapered along the longitudinal direction of the adjusting pin in the direction of the housing portion which cooperates with a formed on the inner recess of the holder projection such that a holding force between the tapered section and the projection is changeable. In this way, a variable along the displacement movement of the adjusting pin relative to the holder, for example, increasing holding force can be realized, which signals to the driver of the vehicle upon actuation of the actuator that with increasing holding force, the detent position between the holder and the adjusting pin comes closer. So it is a tactile signaling the imminent locking position for the driver possible.

It is also provided according to a development of the invention that at the tapered portion on the side facing away from the housing region of the actuating pin a shoulder is formed, which is engaged behind by the projection of the holder. With increasing holding force recognizes the driver of the vehicle that the detent position of the actuator is imminent and then a further displacement movement of the actuating pin relative to the holder will cause the projection of the holder behind the pin formed on the actuating pin will engage and thus the detent position of the actuator and so that the predetermined cold start position of the throttle has been established.

It is also provided according to a development of the invention that the throttle valve device comprises a first cable for actuating the throttle valve in the opening direction and a second cable for actuating the throttle valve in the closing direction and coupled with two cables rotary handle, wherein an actuation of the rotary handle in the direction of the closing direction the throttle valve applied to the actuating device with a restoring force, which leads to a cancellation of the cold start position of the throttle valve. In this way, the throttle device according to the invention can be provided together with all the necessary components as an add-on solution for existing, known motorcycles, which are not equipped with the throttle valve device according to the invention and thus experience a technical upgrade, combined with a gain in comfort for the user vehicle.

Finally, the invention also provides an internal combustion engine with a throttle valve device, as described above, and also a motorcycle with a driver's seat and an internal combustion engine and the throttle device according to the invention.

• Fig. 1 eine Seitenansicht auf eine Drosselklappeneinrichtung nach einer Ausführungsform gemäß der vorliegenden Erfindung in einer unbetätigten Stellung der geschnitten dargestellten Stelleinrichtung;
• Fig. 2 eine Ansicht ähnlich Fig. 1, bei der die Stelleinrichtung betätigt worden ist und sich der Drosselklappe in der Kaltstartstellung befindet;
• Fig. 3 eine Ansicht ähnlich Fig. 1, bei der die Drosselklappe vollständig geöffnet ist;
• Fig. 4 eine Schnittansicht der Stelleinrichtung in unbetätigtem Zustand;
• Fig. 5 eine Schnittansicht der Stelleinrichtung in betätigtem Zustand;
• Fig. 6 eine Darstellung einer Stelleinrichtung nach einer modifizierten Ausführungsform;
• Fig. 7 eine perspektivische Ansicht einer Seilzugtrommel der Drosselklappeneinrichtung;
• Fig. 8 eine schematische Darstellung eines Gasdrehgriffs eines mit der erfindungsgemäßen Drosselklappeneinrichtung versehenen Motorrads;
• Fig. 9 eine Schnittansicht von vorne auf den Gasdrehgriff nach Fig. 8, die den Abschnitt des Gasdrehgriffs zeigt, an dem Seilzüge zur Betätigung der Drosselklappe eingehängt werden können und zwar in einer Stellung, die der Leerlaufstellung der Drosselklappe bei betriebswarmer Brennkraftmaschine entspricht;
• Fig. 10 eine Darstellung ähnlich Fig. 9, die die Drehwinkelstellung bei betätigter Stelleinrichtung zeigt;
• Fig. 11 eine schematische Seitenansicht auf ein Motorrad mit der erfindungsgemäßen Drosselklappeneinrichtung; und
• Fig. 12 eine vergrößerte Darstellung des Details "A" aus Fig. 11.
• Fig. 1 der Zeichnung zeigt eine Seitenansicht auf eine Ausführungsform einer Drosselklappeneinrichtung 1 mit einer in Schnittansicht dargestellten Stelleinrichtung 2 in unbetätigter Stellung.

The invention will be explained in more detail below with reference to the drawing. This shows in:

• Fig. 1 a side view of a throttle valve device according to an embodiment according to the present invention in an unactuated position of the cut actuator shown;
• Fig. 2 a view similar Fig. 1 in which the actuating device has been actuated and the throttle valve is in the cold start position;
• Fig. 3 a view similar Fig. 1 with the throttle fully open;
• Fig. 4 a sectional view of the actuating device in the unactuated state;
• Fig. 5 a sectional view of the actuating device in the actuated state;
• Fig. 6 an illustration of a control device according to a modified embodiment;
• Fig. 7 a perspective view of a cable drum of the throttle valve device;
• Fig. 8 a schematic representation of a throttle grip of a provided with the throttle device according to the invention motorcycle;
• Fig. 9 a sectional view from the front of the throttle grip after Fig. 8 showing the portion of the throttle grip on which cables for operating the throttle valve can be hung and in a position corresponding to the idling position of the throttle valve in operating-warming internal combustion engine;
• Fig. 10 a representation similar Fig. 9 showing the rotational angle position when actuated actuating device;
• Fig. 11 a schematic side view of a motorcycle with the throttle valve device according to the invention; and
• Fig. 12 an enlarged view of the detail "A" from Fig. 11 ,
• Fig. 1 The drawing shows a side view of an embodiment of a throttle valve device 1 with a setting device 2 shown in a sectional view in the unactuated position.

The throttle valve device 1 has a housing 3, which for receiving a closer on the basis of Fig. 7 the drawing drum shown 4 is arranged and in Fig. 1 to 3 the drawing is shown without side cover, so that a view of the in Fig. 1 to 3 schematically shown cable drum 4 is possible.

The cable drum 4 is frictionally connected via a throttle valve shaft 5 with the throttle valve 6, so that a relative rotation of the cable drum 4 via the throttle shaft 5 can be transmitted to the throttle valve 6 and that for opening and closing the throttle valve 6, so for enlargement and reduction one between the throttle valve 6 and a suction pipe 7 a based on Fig. 11 schematically illustrated internal combustion engine 8 formed throttle gap.

In Fig. 1 the throttle valve 6 is shown in a position which shows the idling position of the operating-temperature engine 8. As is readily apparent, the throttle 6 is shown inclined slightly to the left, thus has an opening angle α relative to the vertical of about 1 to 3 degrees, so that the internal combustion engine 8 is supplied with a sufficient for idling operation fuel mixture can be. This position corresponds to the idling operating position with operating-warming internal combustion engine.

At Seilzugtrommel 4 are two Seilzugaufnahmen 9, 10 for in Fig. 1 schematically illustrated cables 19, 20 are formed, wherein the receptacle 9 is provided for receiving a cable nipple of a cable 19 for opening the throttle valve 6 and the receptacle 10 is provided for receiving a cable nipple of a cable 20 for closing the throttle valve 6. The opening movement of the throttle valve 6 takes place in the direction of the arrow 11, while the closing movement of the throttle valve 6 in the direction of the arrow 12 after Fig. 1 takes place.

The cable 19 for opening the throttle valve 6 enters via an opening 13 of the housing 3 in the housing 3 and the cable 20 for closing the throttle valve 6 enters via an opening 14 in the housing 3 a.

Fig. 7 shows the cable drum 4 in a perspective view. The cable drum 4 has a recess 15 for receiving the throttle shaft 5 and has the already in connection with Fig. 1 The cables can be hung with the respective cable nipples or cable ends in the receptacles 9, 10 and then run in the basis of Fig. 7 the drawing apparent Seilzugnuten 16, 17 and pass through the openings 13, 14 out of the housing 3 and then continue in the direction of the basis of Fig. 8 the drawing shown throttle grip 18, as described in the Fig. 1 the drawing schematically illustrated opening cable 19 and the closing cable 20 also shown schematically is the case.

The cables 19, 20 can then be suspended via cable ends in the throttle grip 18 correspondingly trained Seilzugaufnahmen 21, 22, based on Fig. 9, 10th the drawing can be seen.

As it is based on Fig. 7 is shown in the drawing, a stop 23 is formed on the disc-shaped cable drum 4, which is provided for contacting by an engagement portion 24 of a control pin 25 of the actuator 2.

In the in Fig. 1 the drawing shown idle position of the throttle valve 6, the engagement portion 24 is disposed at a distance from the stop 23, the engagement portion 24 is thus not at the stop 23.

On the other hand takes place at the in Fig. 2 shown engagement position of the engagement portion 24 with the stopper 23, a contact between the engaging portion 24 and the stopper 23 instead, resulting in that the throttle valve 6 was rotated in the direction of arrow 11 and therefore the throttle valve 6 is in the cold start position, wherein the Throttle gap is increased compared to the throttle gap in the idle operating position of the warm engine, which in turn causes the engine started receives a larger amount of fuel mixture, as compared to the position of the throttle valve 6 after Fig. 1 the drawing is the case.

In Fig. 3 the drawing is in turn the stop 23 out of engagement with the engaging portion 24 of the actuating pin 25, as this shows a position of the throttle valve 6, when it is in the fully open by the driver of the vehicle position, the driver so the full load corresponding position of Throttle 6 wishes.

The following is now closer to Fig. 4 the drawing described the actuator 2 in more detail.

The actuator 2 has an overall elongated configuration with an actuator button 26 for manual operation by a hand of the rider of the motorcycle Fig. 11 the drawing is provided.

The operating knob has a recess 28 into which an engaging portion 29 of the holder 27 can be inserted, for example in the form of a press fit similar seat.

The holder 27 also has an elongated configuration and has an internal recess 30 into which the elongate setting pin 25 can be inserted. At a first portion 31 of the adjusting pin 25, this is provided with an externally threaded portion 32, via which the adjusting pin 25 can be screwed into a corresponding section with an internally threaded portion 33 of the holder 27. About the thread of the clear distance 34 ( Fig. 4 ) and thus the distance between the engaging portion 24 of the adjusting pin 25 and the stop 23 of the cable drum 4 in the unactuated state of the adjusting device. 2

With the thread can therefore be reacted to the cold start behavior of different internal combustion engines in an advantageous manner such that the clear distance 34 is increased, for example, whereby the distance between the stop 23 and the engagement portion 24 is reduced and an axial displacement of the actuating pin 25 to bring about the cold start position the throttle valve 6 then provides a larger throttle gap than at a smaller clear distance 34 and the engine then a larger amount of fuel mixture for the cold start operation is supplied. Similarly, the distance 34 can also be reduced, thereby the cold start position of the throttle valve 6 is then connected to a smaller throttle gap in the intake manifold 7.

To bring about the in Fig. 5 the drawing illustrated actuated position of the adjusting device 2, which leads to a cold start position of the throttle valve 6, the actuating pin 25 is axially displaced by the user of the vehicle against the action of the trained as a helical compression spring spring means 35 with the aid of the actuating knob 26, resulting in that the adjusting device 2 the in Fig. 2 represented position occupies. The axial displacement of the actuating knob 26 and thus the actuating pin 25 also causes the holder 27 is axially displaced relative to a sleeve-shaped body 36 which is provided with an inner recess 37, whereby simultaneously a locking position of the actuating device 2 is brought about.

As it is readily apparent from Fig. 4 the drawing is apparent, the sleeve-shaped body 36 is fixed axially via a locking ring 38 on a housing portion 39 of the actuator 2. The body 36 is provided on the inner recess 37 with a bulge 40 which is arranged in the unactuated state of the adjusting device 2 in a recess 41 on the outer circumference of the holder 27 and thus a detent position in the unactuated position of the actuator 2 can be made. The indentation 41 and bulge 40 form locking means 55, which are provided for maintaining the actuated position of the adjusting device.

To bring about a detent position in the actuated state of the actuating device 2, the actuating pin 25 is axially displaced against the action of the helical compression spring 35, so that a bulge 42 on the outer circumference of the holder 27 is displaced over the bulge 40 of the sleeve-shaped body 36 and the bulge 42 by means of the now preloaded helical compression spring 35 against the bulge 40 is pressed and thus a detent position in the actuated state of the adjusting device 2 and thus in the cold start position of the throttle valve 6 is brought about.

As it is readily apparent from 4 and FIG. 5 As can be seen in the drawing, the cantilevered length B1 of the engaging portion of the actuating pin 25 in the unactuated position differs from the projecting length B2 of the actuating pin in the actuated position. By changing the projecting length of the engaging portion 24 in the transition from the unactuated to the actuated position of the actuator 2, the rotational angle amount running in the direction of the arrow 11 and thus the size of the change in the throttle gap in the intake manifold 7 is determined and adapted to the starting behavior of different internal combustion engines reached.

The adjusting device 2 is supported via a collar 43 on a collar 44 of the housing 2 and has in the region of the projecting engagement portion 24, a cap 45 which has a shoulder 46 in the region of the upper inner circumference, which at a largest projecting length B2 with an am Setting pin 25 formed corresponding paragraph 47 engages to prevent further protrusion of the engagement portion 24.

Fig. 6 The drawing shows an alternative embodiment of an adjusting device 2a, which extends from the adjusting device 2 4 and 5 essentially differs in that the adjusting pin 48 has a tapered toward the housing 4 portion 49, which cooperate with a formed on the inner recess 50 of the modified holder 51 projection such that a holding force between the tapered portion 49 and the projection 52 is formed.

The holding force increases with the amount of the sliding movement of the adjusting pin 48 in the direction of arrow A (see Fig. 6 ) and signals the driver of the vehicle with increasing holding force that in a further sliding movement of the actuating pin 25 in the direction of arrow A a trained pin on the actuating paragraph 53 is reached, which can be engaged behind by the projection 52 of the holder 51 to a detent position of the modified To achieve adjusting device 2a.

Fig. 8 The drawing shows a plan view of a throttle grip of the in Fig. 11 the drawing illustrated motorcycle.

The cables 19, 20 enter via the guide 54 of the throttle grip 18 in the housing 56 and can be detachably fixed there to a pulley 57, which is similar to the cable drum 4 in such a way that the throttle grip 18 facing cable ends or cable nipple be inserted into the cable shots 21, 22 and fixed there.

The cable receiver 21 serves to receive the cable end of the opening cable 19 while the cable receiver 22 is used to receive the cable end of the closing cable 20.

Fig. 9 the drawing shows the throttle grip 18 in the idle position of the engine in the operating temperature, ie the position accordingly Fig. 1 , while Fig. 10 the position of the throttle grip 18, the position of the throttle valve 6 after Fig. 2 corresponds, so the cold start position.

As will be readily apparent, the throttle grip 18 is after Fig. 10 has been rotated by about 5 degrees in the direction of arrow 58, ie in the direction in which the throttle grip 18 is rotated according to the opening direction of the throttle valve 6.

This position of the throttle grip 18 after Fig. 10 turns on, since the transition from the unactuated position of the throttle valve device 1 after Fig. 1 in the actuated position to Fig. 2 the receptacle 10 for the closing cable 20 according to the arrow 59 after Fig. 2 performs corresponding rotational movement and thus the throttle grip 18 of the rotational movement of the cable drum 4 and thus the throttle valve 6 follows.

After the not yet operating temperature having engine 8 was started and although with the Fig. 2 corresponding cold start position of the throttle valve 6, the driver of the motorcycle via a corresponding operation of the throttle grip 18 can carry out his usual driving operations with the motorcycle and, for example, when the engine 8 is in overrun, ie the throttle grip 18 is closed, via an actuation of the Throttle handle in the direction of arrow 60 after Fig. 10 , ie in the direction of the closing direction of the throttle valve 6, an in Fig. 1 Apply traction force on the closing cable 20 indicated by the arrow F.

This tensile force causes over the stop 23 of the cable drum 4 in the direction of arrow 61 to Fig. 2 acting pressure force is exerted on the adjusting pin 25, which, supported by the spring force of the prestressed helical compression spring 37, the adjusting device 2 can jump back to its unactuated position and indeed from the in Fig. 5 the drawing shown detent position of the adjusting device in the in Fig. 4 illustrated unconfirmed position. Thus, the cold start position of the throttle valve 6 is repealed and the driver does not have to do any manipulation of the adjusting device 2 directly, but can do this via the throttle grip 18 via remote access.

To explain why this is beneficial will be on Fig. 11 the drawing reference. This shows a motorcycle 62, which is equipped with the throttle valve device 1 according to the invention. The facilitation of the sake of clarity is shown as detail "A" the engine 8 is shown enlarged in order to better explain the position of the throttle device 1 can.

As can be readily seen, the adjusting device 2 is arranged on the throttle device 1 in the downward direction on the motorcycle 62, which ensures that in the case of a possible component defect of the adjusting device 2, the throttle valve 6 can not unintentionally take their cold start position and thus not in unintentionally, the throttle gap in the intake manifold 7 is increased.

The motorcycle 62 in the illustrated example is a designated for competition purposes railing motorcycle with a front wheel 63, a rear wheel 64, a driver's saddle 65, a fuel tank 66 and a handlebar 67, at which the basis of Fig. 8 illustrated throttle grip 18 is arranged.

As it is based on Fig. 12 As can be seen from the drawing, the driver of the motorcycle 62 can also reach the throttle body 1 arranged adjacent to the frame tube 68 and the actuator 2 arranged thereon to activate the cold start position of the throttle 6 even if it is already seated on the driver saddle 65 and has to activate the cold start position push the actuator knob 26 of his from only in the upward direction, whereby the cold start position is activated.

After he has started the engine 8, either by means of an electric starter or by means of a kick starter, the internal combustion engine 8 immediately decays into a stable idle in cold start mode and the driver can start immediately, without having to bring the engine to operating temperature in the state, like this has been customary in off-road sports. After a short time, the internal combustion engine has reached its operating temperature and the driver of the motorcycle actuates the throttle grip 18 in the direction of the closed position of the throttle valve 6, as above was explained. The driver does not have to press the cold start position with a manual operation of the actuator 2 directly to the throttle device 1, but can disable the cold start position of the throttle 6 remote access by simply pressing the throttle grip 18 against the opening direction of the throttle. This leads to a considerable gain in comfort for the driver also because in off-road motorcycles, the outgoing from the engine 8 exhaust pipe 69 is often performed at the level of the engine directly to the rear, as described in the Fig. 11 the drawing stylized illustrated exhaust pipe 69 is the case.

When the exhaust pipe is cold, there is no problem for the driver of the motorcycle 62 to activate the adjusting device 2 arranged directly adjacent to the exhaust pipe 69 or the exhaust manifold, while deactivation by direct manipulation of the adjusting device with hot exhaust pipe increases the risk of injury to the hand or fingers of the motorcycle Driver brings with it. This problem has been elegantly solved by the driver of the vehicle can easily and safely disable the cold start position of the throttle by means of an operation of the throttle grip in the closing direction of the throttle.

With regard to the features of the invention which are not explained in greater detail above, reference is expressly made to the claims and the drawings.

LIST OF REFERENCE NUMBERS

1.

throttle device

Second

setting device

Third

casing

4th

cable drum

5th

throttle shaft

6th

throttle

7th

suction tube

8th.

Internal combustion engine

9th

admission

10th

admission

11th

Arrow opening movement

12th

Arrow closing movement

13th

opening

14th

opening

15th

recess

16th

Seilzugnut

17th

Seilzugnut

18th

Throttle grip

19th

opening cable

20th

closing cable

21st

cable recording

22nd

cable recording

23rd

attack

24th

engaging portion

25th

setting rod

26th

actuating button

27th

holder

28th

recess

29th

engaging portion

30th

inner recess

31st

first section

32nd

Externally threaded section

33rd

Internally threaded portion

34th

clear distance

35th

Helical compression spring

36th

sleeve-shaped body

37th

inner recess

38th

circlip

39th

housing section

40th

bulge

41st

indentation

42nd

bulge

43rd

collar

44th

Federation

45th

cap

46th

paragraph

47th

paragraph

48th

setting rod

49th

Rejuvenating section

50th

Inner recess of the holder

51st

holder

52nd

head Start

53rd

paragraph

54th

guide

55th

latching means

56th

casing

57th

cable pulley

58

opening direction

59th

arrow

60th

arrow

61st

thrust

62nd

motorcycle

63rd

front

64th

rear wheel

65th

driver Seat

66th

Fuel tank

67th

handlebars

68th

frame tube

69th

exhaust pipe

Claims (16)

Throttle valve device (1) for an internal combustion engine (8), comprising a housing (3) and a suction pipe (7) having a flow cross section and a throttle flap (6) pivotable relative to the flow cross section, which can be actuated by means of a throttle shaft (5), characterized by on the housing (3) arranged adjusting device (2), by means of which the throttle valve (6) in a the flow cross-section at least partially released releasing cold start position is releasably fixed. Throttle valve device (1) according to claim 1, characterized in that the throttle valve shaft (5) by means of at least one cable (19) in the opening direction of the throttle valve (6) is actuated and the cable (19) in operative connection with a housing (3) arranged cable drum (4) which is coupled to the throttle shaft (5). Throttle valve device (1) according to claim 1 or 2, characterized in that the throttle valve shaft (5) by means of at least one cable pull (20) in the closing direction of the throttle valve (6) is operable and the cable (20) in operative connection is arranged with a in the housing (3) arranged cable drum (4), which is coupled to the throttle valve shaft (5). Throttle valve device (1) according to one of the preceding claims, characterized in that the actuating device (2) is designed for manual actuation to bring about the flow cross-section at least partially released cold start position of the throttle valve (6) and to cancel this position. Throttle valve device (1) according to one of the preceding claims, characterized in that the adjusting device (2) for canceling the flow cross-section at least partially released free-starting position of the throttle valve (6) is formed by means of an operation by a cable. Throttle valve device (1) according to one of the preceding claims, characterized in that the adjusting device (2) by means of a cable (20) for actuating the throttle valve (6) in the closing direction of the flow cross section at least partially released actuated cold start position of the throttle valve (6) one of the adjusting device (2) unactuated position of the throttle valve (6) can be brought. Throttle valve device (1) according to one of the preceding claims, characterized in that the adjusting device (2) has a spring device (35) and an actuating pin (25, 48) axially displaceable against the action of the spring device (35), with one on the cable drum (4) formed stop (23) can be brought into abutment such that the throttle valve (6) is pivotable about a predetermined angle of rotation for bringing about a flow cross section at least partially released actuated cold start position of the throttle valve (6). Throttle valve device (1) according to one of the preceding claims, characterized in that the adjusting device (2) locking means (55) releasably define the actuating device (2) in the flow cross-section at least partially releasing actuated cold start position of the throttle valve (6). Throttle valve device (1) according to claim 7 or 8, characterized in that the adjusting device (2) has an inner recess (37) formed with a sleeve-shaped body (36) which is adapted to receive the adjusting pin (25) and the adjusting pin (25). is arranged along a first longitudinal section (31) in a holder (27) formed with an internal recess (30). Throttle valve device (1) according to claim 9, characterized in that the holder (27) in the inner recess (37) of the sleeve-shaped body (36) is received axially displaceable relative to this and on the outer circumference has a recess (41), which with a on Inner circumference of the sleeve-shaped body (36) formed bulge (40) for bringing about a locking position of the actuating device (2) can be brought into releasable engagement. Throttle valve device (1) according to one of claims 9 or 10, characterized in that the adjusting pin (25) in the region of an actuating button (26) facing end portion has a threaded portion (32) along which the adjusting pin (25) relative to the one with Corresponding threaded portion (33) provided holder (27) rotatable and axially displaceable is such that a out of a housing portion of the actuating device (2) protruding out end portion (24) which is engageable with the stop (23) of the cable drum (4) into abutment is variable in terms of the outstanding length of the end portion (24). Throttle valve device (1) according to one of claims 1 to 9, characterized in that the adjusting pin (48) extends along the longitudinal direction of the adjusting pin (48) in the direction of the housing (3) tapered portion (49) cooperating with a on the inner recess (30) of the holder (27) projection (52) cooperates such that a holding force between the tapered portion (49) and the projection (52) is variable. Throttle valve device (1) according to claim 12, characterized in that on the tapered portion (49) on the side facing away from the housing (3) region of the adjusting pin (48) has a shoulder (53) is formed by the projection (52) of the holder (27) is tangible. Throttle valve device (1) according to one of the preceding claims, characterized by a first cable pull (19) for actuating the throttle flap (6) in the opening direction and a second cable pull (20) for actuating the throttle flap (6) in the closing direction and one with two cable pulls (19 , 20) coupled throttle grip (18), wherein an actuation of the throttle grip (18) in the direction of the closing direction of the throttle (6), the adjusting device (2) applied with a restoring force, which leads to a cancellation of the cold start position of the throttle valve (6). Internal combustion engine (8) with a throttle valve device (2) according to one of the preceding claims. Motorcycle (62) comprising a driver's seat (65) and an internal combustion engine (8), characterized by a throttle valve device (1) according to one of Claims 1 to 14.

Images