HUNGARIAN ELECTRIC VEHICLES AND A NEW HYBRID CONCEPT

Abstract

The first 34 pieces of electric lorries were built and used between 1924-1945 by the Hungarian Royal Post for the transportation of parcels and packages with mechanically parallel-series switched lead-acid batteries. Following the "semiconductor age" the Research Institute of the Electrical-Industry (VKI) constructed 10 pieces of chopper controlled EV-s with a payload of half a ton for the Post again. Following researches on hybrid buses and a duo-bus, in 1989 the factory PULI started to produce 300 two-seaters and other smaller cars a year mostly for excursion purposes, or coffin- transporters in cemeteries. Our endavour was to construct a continuosly changeable transmission with high efficiency driven by an internalcombustion engine (IC), and because the mass of batteries are generally very heavy we reduced them to the necessary minimum value. The same batteriesare able to start the engine through a permanent magnet generator, operating now as a starter. The expected life-time of such a starter has to be 30 times higher then a conventional DC one. This makes it possible to stop the engine at crossings and in jams more often and this reduces the pollution. A new proposed hybrid EV drive with power-branching has electric and (IC) drive for 2 or 4 axles using a planetary gear which makes possible a drive on highways with combustion engines, at down-towns with electricpower, and on hills both in parallel operation. At the actual presentation we introduce our slides or photographs about the construction, manufacturing and production of our electric cars