MXPA97010302A - Air temperature regulator device aspirated in an inte combustion engine - Google Patents

Abstract

The present invention relates to an air temperature regulating device sucked by an internal combustion engine, said device comprises an air intake duct including a cold air inlet part, a hot air inlet part and a part of mixed air, a control flap being arranged in the air intake duct for movement between a first and a second end position, said control flap in the first end position closes the cold air inlet part, and said control flap in the second end position closes the hot air inlet part, a bulb thermostat adapted in said air intake duct, so that the sucked air entering through the duct passes around said thermostat of bulb, said bulb thermostat is operatively connected by means of a traction rod to said control flap, to move the clapper of A re-integration spring located on said traction rod, a longitudinal guide provided on the control flap for adjusting the excessive travel of the bulb thermostat, and an excessive travel spring arranged on the longitudinal guide to compensate for the excessive travel of the thermostat bul

Description

AIR TEMPERATURE REGULATOR DEVICE ASPIRED IN AN INTERNAL COMBUSTION ENGINE The present invention relates to an air temperature regulating device sucked by an internal combustion engine of the type comprising a fresh air duct integrated by a cold air duct, a hot air duct and a mixed air duct, being a control flap is arranged in the fresh air duct, which in an extreme position closes the cold air duct and in the other extreme position closes the hot air duct and the control flap being swiveled by a bulb thermostat over which it flows the cold air sucked in, a traction rod having been provided by means of which the bulb thermostat is connected to the control flap and a recovery spring is mounted on said traction rod, and an additional stroke spring having been provided to compensate the additional stroke of the bulb thermostat. Devices of this type, such as have been described, for example, in German patent DE 15 26 662, are simple in construction and therefore economical to manufacture. The bulb thermostat is a regulating element with sufficient force and stroke for the intended purpose. However, in these devices it is a disadvantage that all the components are arranged in the cold air or mixed air duct, which causes a greater aerodynamic resistance. Consequently, there is a tendency to conform to the driving devices in the most favorable way possible from the aerodynamic point of view and to avoid large elements. From the German provisional patent DE-OS 34 08 609 a device is known, which is arranged in a partial current duct. Said device is swept by the air-mixture, having to overcome the same considerable aerodynamic resistances.

Furthermore, it is known from US patent 43 40 172 a device for regulating the temperature of the air aspirated by an internal combustion engine. Said device is also substantially in the air-mixing duct and governs from it two flaps arranged in a mutually parallel manner, which work in opposite directions. A disadvantage of said device lies in the fact that the air-mixture must overcome substantial aerodynamic resistances.

Due to the construction principle, a recovery spring is also required for the bulb thermostat, as well as an additional stroke compensation spring and a recovery spring for the control flap. The recovery spring for the bulb thermostat and the stroke spring are arranged telescopically. A disadvantage of said arrangement lies in the fact that it is necessary to increase the diameter of the device strongly, which in turn strongly influences the aerodynamic characteristics. The present invention aims to overcome the aforementioned disadvantages and provide a regulating device for the temperature of the air sucked by an internal combustion engine, which is favorable from the aerodynamic point of view and which working reliably can be arranged in the pipeline of aspiration. Said purpose is met by an air temperature regulating device sucked by an internal combustion engine of the initially mentioned type, which is characterized in that a longitudinal guide is provided on the control flap, which is shaped so as to absorb the additional stroke and the additional stroke spring being disposed in the longitudinal guide, the longitudinal guide comprising a hook arranged in the control flap and in which the pull rod attacks, a slide element having being mounted in said longitudinal guide being further provided. . The substantial advantage of the present invention lies in the fact that by means of the provision of the additional stroke spring on the control flap a very slender construction of the device as a whole is achieved. Additionally, it is possible to shorten the total length of the device since the additional travel spring is not arranged in front of the point of attack of the traction rod in the control flap, but after that point of the traction rod in the flap of command.

Another advantage lies in the fact that an additional closing spring is no longer required for the control flap, which must prevent the clamping of the control flap. According to a development of the present invention, the longitudinal guide has a hook, which is arranged in the control flap. In said hook attacks the traction rod, the same being simultaneously the point of support for a sliding element that is mounted displaceably the longitudinal guide. The sliding element rests in its normal position on one side in the eye of the hook and on the opposite side in the longitudinal guide. Another embodiment of the present invention provides to provide the control flap with a so-called air attenuating member, which is constituted substantially by a tubular shaped bead that penetrates the hot air duct and regulates the air flow in the vicinity of the closed position. Another embodiment of the present invention provides for mounting to the traction rod, which on the one hand is linked to the bulb thermostat, on the opposite side in a guide integral with the housing. Said guide can be constituted in a very simple way by a perforation, through which said traction rod is driven. The hook for the traction rod and for the sliding element is open on one side, the opening angle being limited so that an additional stroke can only move the sliding element along the guide when the control flap is completely closed . The above has the advantage that the device as a whole can work without disturbances, that is to say can not take place a seizure by tilting or clogging of the control flap and a wrong positioning conditioned thereby due to an early start of the additional stroke . In a particularly advantageous embodiment of the present invention, both air inlet openings, ie the inlet opening for fresh air and the inlet opening for hot air are opened or closed by means of the bulb thermostat and the flap of command. In the present case, a second flap is not required to increase the aerodynamic drag. These and other features of preferred embodiments of the present invention can be seen in addition to the claims, also of the specification and the drawings, the different characteristics being able to be embodied by themselves or several in the form of sub-combinations in the embodiment of the present invention and in other fields and representing advantageous self-protected embodiments, for which protection is claimed. The present invention will be illustrated below in connection with exemplary embodiments. Figure 1 illustrates a sectional view of a device regulating the temperature of the air sucked by an internal combustion engine in the closed position of the hot air. Figure 2 illustrates a detailed view of the hook of the pull rod. Figure 3 illustrates the device illustrated in Figure 1, in the hot air opening position. Figure 4 illustrates the device illustrated in figure 1, in the closed position of the hot air with additional stroke.

Figure 1 illustrates a device for regulating the temperature of the air sucked in with a fresh air duct 10, a hot air duct 11, as well as a ducting of mixed air or fresh air 12. Each duct is provided with a coupling connection to which can be coupled in each case an air conduction hose or the like. In the cold air duct 10 there is a bulb thermostat 14 mounted on a support 13. The push rod 15 of said bulb thermostat 14 is linked to a pull rod 16, which is mounted in an axially displaceable manner by its right end in a guide 17 solidary with the housing. The hot air duct 11 can be closed by means of a control flap 18, which is rotatably mounted around a rotation axis 19 in the housing 20 of the device.

Another guide 21 and a "jancho" are provided on the control flap 22. Figure 2 illustrates in a detailed view said control flap 18 provided with the hook 22 and the guide 21. Between the hook and the guide, a sliding element 23 is mounted, which can perform a longitudinal movement, that is to say in the longitudinal direction of the control flap 18 and is contrasted by an elastic force directed to the left exerted by a compression spring 24 so that a journal 25 provided at the left end of the sliding element 23 abuts inside the hook 22. In the 25 is also recessed in the tension rod 16.

Figure 1 illustrates the normal position or resting position, ie the control flap closes the hot air duct, while the cold air can flow without further resistance through the mixing air duct and the thermostat 14 does not present any stroke additional. Figure 3 shows identical parts provided with the same reference numerals. In this case the control flap is in the open state, ie in this position the hot air can flow without further resistance from the hot air duct 11 to the air duct mix 12, the duct being closed to the cold air 10. Bliss position is achieved by a cold air whose temperature is below a certain minimum value. This cold air causes the contraction of the push rod 15 of the bulb thermostat 14, displacing a compression spring 26 mounted on the pull rod 26 to the latter to the left and thereby causing the opening movement of the control flap , meaning that the latter tilts upwards at an angle of approximately 45 °.

In figure 4, in which identical parts with the same reference numbers have also been provided, the control flap is in turn in the closed position as in figure 1, ie the fresh air temperature is sufficiently elevated so that it is not necessary to feed hot air. In this case, however, the fresh air temperature causes an additional stroke, ie the bulb thermostat reaches its maximum stroke. In this case the sliding element 23 disengages from the hook 22 and is displaced to the right against the spring force of the spring 24. Due to the fact that the pull rod 16 is guided, as also the sliding element 23 in the guide 21, it is guided. it obtains a defined longitudinal movement of the sliding element 23. Due to the fact that the angle of the opening of the hook 22 is limited, the journal 25 of the sliding element 23 can only be disengaged from the hook in this position. In the position illustrated in FIG. 3, the sliding element can not be detached from the hook, it being impossible for a disturbance to occur due to a spontaneous decoupling.

Claims (5)

1. CLAIMS 1.- Air temperature regulating device sucked by an internal combustion engine, of the type comprising a fresh air duct integrated by a cold air duct, a hot air duct and a mixed air duct, being arranged in the fresh air duct a control flap that closes the cold air duct in one extreme position and in the other extreme position closes the hot air duct and the control flap being swiveled by a bulb thermostat over which the air flows cooled suction, having provided a traction rod by which the bulb thermostat is linked to the control flap and a recovery spring is mounted on said traction rod, and an additional stroke spring is also provided to compensate for the additional stroke of the bulb thermostat, CHARACTERIZED because on the control flap a u a longitudinal guide, which is shaped so as to absorb the additional stroke and the additional stroke spring being disposed in the longitudinal guide, the longitudinal guide comprising a hook arranged in the control flap and in which the pull rod attaches, there being further provided a sliding element that is mounted in said longitudinal guide.
2. 2. - Device according to claim 1, CHARACTERIZED in that the control flap has an air attenuating member that prevents oscillation of the flap in the vicinity of its closed position.
3. 3. Device according to at least one of the preceding claims, CHARACTERIZED in that the traction rod is slidably mounted on its opposite side with respect to the bulb thermostat in another guide integral with the housing.
4. 4. - Device according to at least one of the preceding claims, characterized in that the detachment of the sliding element of the hook takes place only when the control flap is completely closed.
5. 5. Device according to at least one of the preceding claims, CHARACTERIZED because both intake orifices are governed by the same bulb thermostat. R E S U N E A temperature regulating device aspirated by an internal combustion engine is proposed here. Said device is constituted by a cold air duct, a hot air duct and a mixed air duct. Said mixing air channel, also called a fresh air channel, is provided with a control flap, which in an extreme position closes the cold air duct and in the other extreme position the hot air duct and which is swivelable by medium of a bulb thermostat on which the cooled cold air flows. A pull rod is provided in the bulb thermostat, which connects said bulb thermostat with the control flap. A recovery spring is mounted on said tension rod. In addition, an additional travel spring is provided to compensate for the over-travel of the bulb thermostat 14. On the control flap 18 there is a longitudinal guide 21, which is shaped to absorb said over-travel, the additional travel spring being arranged in said position. longitudinal guide.