NOVELTY - An alternate current (AC) generator (20) is powered by a hydrocarbon fueled engine (14). An AC electric motor is drivingly connected to a power train of the vehicle. The AC generator and at least one direct current (DC) battery provide input to an AC/DC controller (22). The AC/DC controller converts DC input from at least one DC battery to AC and outputs AC to the AC electric motor to drive the power train of the vehicle. A DC pulsed charge computer controller (30) is connected to the AC/DC motor controller and DC battery.    USE - Hybrid propulsion system for powering diesel electric series heavy vehicle such as class 8 DOT vehicle (claimed) e.g. class 8 DOT classified semi-tractor trucks under normal load conditions and at highway speeds.    ADVANTAGE - A hydrocarbon fueled-electric series hybrid propulsion system eliminates the Jake brake and accomplishes the same slowing of a vehicle as the Jake brake but doing so electronically with very little or no noise. The ample DC current is provided to produce usable amounts of hydrogen for injection into the hydrocarbon fuel injection system. The fuel ignition timing issues are easily handled when hydrogen is added to a fuel admixture in a constant rotation per minute (rpm) hydrocarbon fueled engine, thus increasing fuel mileage with a cleaner burning engine and without the timing issues related to an IC engine operating at varying rpm modifications and torque ranges. The AC electric drive motor, the AC/DC controller, and the AC generator preferably are sized to obtain desired speed and load conditions taking into account the mass of the vehicle, the efficiency of the drive train, the coefficient of resistance of the rolling tires of the vehicle, the overall drag coefficient, the radius of the wheels, the resistance of the braking and steering, and the final gear ratio of the vehicle. The AC/DC controller electronically adjusts through a computer program in the CPU controller the amount of torque and current that is available to the AC electric drive motor, thus eliminating the need for a transmission and the mechanical losses associated with a transmission and the fluid power transfer losses to increase the efficiency of the drive train. The thin plate flooded lead acid cells and the integrated electrolyte circulation system allow for faster charging of the DC battery packs. The electrolyte circulation system prevents stratification of the electrolyte within the individual cells of the battery packs and boiling off of the electrolyte during charging of battery packs, thus allowing for faster recovery times of the battery packs and longer life. The propulsion system allows the hydrocarbon fueled engine to have its ignition timing manipulated to a point that nitrous oxide (NO) emissions may be reduced without affecting the performance of the engine and the drive train of the system. The carbon-di-oxide (CO2) emissions can be reduced by virtue of the fact that less hydrocarbon fuel is burned during operation of the vehicles.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) class 8 DOT vehicle; and    (2) battery arrangement for hybrid propulsion system for powering vehicle under normal load conditions and at highway speeds.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating a hydrocarbon fueled-electric series hybrid propulsion system.    Hydrocarbon fueled engine (14)    AC generator (20)    AC/DC controller (22)    DC pulsed charge computer controller (30)    AC inverter duty motor (32)