| 摘要 |
<p>The present invention relates to a starting device for an automobile engine or a similar internal combustion engine, and more particularly of the type in which the initial power is supplied by a pre-tensioned spring (4), the accumulated energy (spring tension) of which is trigged under the startup process. The spring does affect the combustion engine via a boot drive (12, 13, 14), which is coupled to the engine flywheel (16, 17) during the startup process. The boot drive is automatically disconnected from the engine flywheel as soon as the engine rotates under its own power. The novelty of the invention lies in the fact that, in connection with the spring- operated boot drive, there is inserted an electric motor (5) with the object to tension the spring (4) before each start up process. The electric motor–in the following description named tension-motor (5)–affect the spring via a reduction gear drive (6) with relatively large exchange ratio. That allows the use of a relatively small tension- motor with an equivalent small current demand, and can therefore be driven by a Li- ion or Ni-MH battery. This battery types are more environmentally friendly than the traditionally today used lead-acid battery. Under normal circumstances the tensioning of the spring will take place while the combustion engine is running, i.e. while the engine electric generator produces electric power. Therefore the electric energy for the tensioning of the spring is delivered directly from the combustion engine itself. The Li-ion or Ni-MH battery serves only as a backup energy source for the spring- operated starting device, and is only to be used in special occasion. The advantage by the new starting device is that the electrical system and in particular the battery can be dimensioned for a much lower maximum current than in the normal combustion engine driven cars, where the direct-acting electric starter demands for a very high electrical power (current) during the startup process. These demands can only be accomplished with a lead-acid battery, not with Li-ion or Ni-MH batteries, and these environmentally friendly batteries are therefore no option today.</p> |
