Speed limiters for internal combustion engines with controlled coil ignition |
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| 申请号 | US3777088D | 申请日 | 1972-03-07 | 公开(公告)号 | US3777088A | 公开(公告)日 | 1973-12-04 |
| 申请人 | CITROEN SA; | 发明人 | GROSSEAU A; | ||||
| 摘要 | The speed limiter comprises, on an element rotated at a speed proportional to that of the engine, a contact fixed with respect to this element and a movable contact adapted to approach the fixed contact under the effect of the centrifugal force and against the effect of a return spring. One of these contacts is connected to the secondary winding of the ignition coil of the engine and the other to ground. When the speed of the engine reaches a predetermined threshold, the movable contact touches the fixed contact and cuts off the ignition of the engine by grounding said secondary winding. A screen of electrically insulating material is guided on said element and connected mechanically to the movable contact so that it is inserted between the two contacts as long as the speed of the engine is less than a limit itself less than said threshold but close to the latter and so that it retracts when this speed exceeds the said limit. | ||||||
| 权利要求 | 1. Speed limiTer, for internal combustion engines with controlled coil ignition, for use on a rotary element arranged for rotation at a speed proportional to that of the engine, said speed limiter comprising, in combination, a contact fixed with respect to said rotary element and a movable contact adapted to approach the fixed contact under the effect of the centrifugal force on said rotation and against the effect of a return spring, one of these contacts being connected to the secondary winding of the ignition coil of the engine and the other to ground, said fixed and movable contacts being arranged so that, when the speed of the engine reaches a predetermined threshold, the movable contact touches the fixed contact and cuts off the ignition of the engine by grounding said secondary winding, and a screen of electrically insulating material guided on said rotary element and connected mechanically to the movable contact so that it is between the two contacts as long as the speed of the engine is less than a limit itself less than said threshold but close to the latter and so that it is no longer between said two contacts when this speed exceeds the said limit. 2. In an ignition distributor, wherein said rotary element has an insulating body, the combination of a speed limiter according to claim 1, and said rotary element. 3. Speed limiter and rotary element combination according to claim 2, including a housing and guides formed in the insulating body, an axle, in said housing, on which said movable contact is mounted and situated so that the movable contact can pivot therein, against the action of a return spring, in a plane passing through the axis of rotation of the insulating body, the screen being mounted in slideable manner in said guides and thereby accompanying the angular movements of the movable contact around its axle. 4. Speed limiter and rotary element combination according to claim 3, wherein the screen and the guides of the insulating body have a circular arcuate profile and wherein the movable contact has a projection engaged in a groove provided in the screen. 5. Speed limiter and rotary element combination according to claim 2, wherein the movable contact is constituted by a conductive slider which is guided so as to be slidable radially over the insulating body, a return spring opposing said radial sliding, and wherein the screen is constituted by the end of an element pivotable around an axis at right angles to the axis of rotation of the rotary element, the slider possesses a ramp which cooperates with a boss of the screen element, and a second spring is arranged to act on the screen element to hold said boss in contact with said ramp. |
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