Patent Application
20110036328
1. Field of the Invention
This invention relates to a safety device for the throttle operation, particularly to one capable to solve a grave problem that the throttle is stuck immovable and the engine is consequently keeping operation at a high speed, impossible to be controlled to reduce the speed of its operation.
2. Description of the Prior Art
As to the traditional mode of controlling a vehicle throttle, the throttle lever is pushed upward by means of an end of a spring, with the throttle lever having one end connected to a shaft; the shaft has one end connected to a linking plate that is connected to a throttle line at one end. Then the shaft can be moved by the throttle lever, with the linking plate and the throttle line shifting synchronously, so the throttle valve may be opened in various degrees and the engine operates to give out an output to drive a vehicle. If the throttle line is released, then it may at once recover the original position to decrease the operating speed of the engine to a slow condition. This kind of pressing down and releasing movement for controlling the throttle is not so ideal, because the throttle line can be frozen to get stuck in case of much moisture in a cold weather. Moreover, if the throttle line becomes old or something miscellaneous enters to tightening the throttle line immovable, it cannot work normally. Or the throttle valve in the throttle does not work well because of its old age or of inferior quality. All those defects can affect the normal function of the operation of the throttle which may cause irregular operation of the engine that may keep its high speed of operation without possibility of lowing down its speed. This conventional uncontrollability of a vehicle easily gives rise to a danger in driving.
This invention has been devised to offer a safety device for the throttle operation for the purpose to keep a vehicle safely from causing dangerous driving.
The characteristics of the safety device for the throttle operation are a linking plate, a pulling plate, a throttle line, a throttle lever, and a contract switch. The linking plate has one end connected to a shaft and another end formed with a bent wing. The pulling plate has one end formed with a shaft hole to connect with the shaft and located at a side of the bent wing and another end resting on the end surface of the bent wing, which moves the throttle line to pull the pulling plate to shift for an angle for opening the throttle. The contact switch has a contact point contacting the surface of the linking plate during the throttle lever not yet stepped down. When the contact point comes to contact the linking plate, the contact switch may electrify an engine control system, which functions to force the engine to reduce it speed to a slow condition, even if the throttle line is stuck immovable due to frozen moisture by cold temperature after opening the throttle. Moreover, even if an alternative ignition control system is used, the engine power can be reduced or completely be interrupted its output until the engine comes to a slow condition, preventing a vehicle from causing a wild operation of the engine.
This invention will be better understood by referring to the accompanying drawings, wherein:
A safety device for a throttle operation in the present invention, as shown in
The shaft 10 passes through two shells 20, 21, supported by a bearing 22 at two ends respectively.
The throttle lever 11 is connected with a torque spring 110 at one end, being hung up by the torque spring 110, with another end combined with the shaft 10 by non-circular connection. So the throttle lever 11 and the shaft 10 move synchronously and diametrically, activating the shaft 10 rotates for an angle at that position when the throttle lever is stepped down.
The linking plate 12 is combined with the shaft 10 at one end by means of non-circular connection, activating the shaft 10 to rotate diametrically and synchronously, with another end formed with a bent wing 120 with a 90 degree bending.
The pulling plate 13 is positioned at a side of the bent wing 120 of the linking plate 12, having one end formed with a round hole for movably combined with the shaft 10, and the other end resting on a side surface of the bent wing 120 and having a pilling member 130 formed thereon to connect to a throttle line 131.
The contact switch 14 is fixed in a clamp hole 230 of a gasket 23, having a contact point 140 contacting the linking plate 12 when the throttle lever 11 is not yet stepped down. When the contact point 140 is moved to contact the linking plate 12, the contact switch 14 becomes electrically connected to the engine controller system. In the condition that the contact switch 14 is connected to the engine controller system, if the engine controller system finds out the engine is keeping operation at a high speed, and impossible to slow down, with the contract switch 14 being found at the position of the throttle shut down, the engine controller system will force the engine to slow down its operation. And even if the alternate ignition control system is used, the engine may be forced to cut down its output or may be completely interrupted in its output until the engine may recover the “slow” operating condition. Thus the wild operation of a vehicle can be prevented from happening.
How to use this method is to be described as follows, referring to
1. If the throttle lever is stepped down as shown in
2. If the throttle lever 11 is released as shown in
If the throttle line 131 is stuck immovable because of frozen moisture or any other factor after releasing the throttle lever 11, the throttle line 131 and the pulling plate 13 cannot return to their original position as shown in
The invention has the following advantages as can be seen from the above description.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.
