(JP9503974-W)      The energy storage system includes a flywheel rotor assembly which includes a hollow cylindrical housing (10) having end caps (11) at opposite ends, each connected to a part (12) of a vehicle framework. The housing defines a cylindrical space in which is located a rotor (13) rotatable about stator members (14) which are secured to each one of the end caps.    The housing is of substantial construction to contain the rotor should it fail at high speed and to provide strength and impact resistance for the vehicle. Arrangements are provided for diving the flywheel and for extracting energy from it under the control of a control system.    USE/ADVANTAGE -   Flywheel system for storage of motive power in motor vehicle, e.g. to substitute battery energy storage. Containment vessel is integrated as part of vehicle main structure enabling energy storage per unit mass and power per unit mass to be much greater than for conventional flywheel systems.    (EP717685-B1)      The energy storage system includes a flywheel rotor assembly which includes a hollow cylindrical housing (10) having end caps (11) at opposite ends, each connected to a part (12) of a vehicle framework. The housing defines a cylindrical space in which is located a rotor (13) rotatable about stator members (14) which are secured to each one of the end caps.    The housing is of substantial construction to contain the rotor should it fail at high speed and to provide strength and impact resistance for the vehicle. Arrangements are provided for diving the flywheel and for extracting energy from it under the control of a control system.    USE/ADVANTAGE -   Flywheel system for storage of motive power in motor vehicle, e.g. to substitute battery energy storage. Containment vessel is integrated as part of vehicle main structure enabling energy storage per unit mass and power per unit mass to be much greater than for conventional flywheel systems.    (US5931249-A)      The energy storage system includes a flywheel rotor assembly which includes a hollow cylindrical housing (10) having end caps (11) at opposite ends, each connected to a part (12) of a vehicle framework. The housing defines a cylindrical space in which is located a rotor (13) rotatable about stator members (14) which are secured to each one of the end caps.    The housing is of substantial construction to contain the rotor should it fail at high speed and to provide strength and impact resistance for the vehicle. Arrangements are provided for diving the flywheel and for extracting energy from it under the control of a control system.    USE/ADVANTAGE -   Flywheel system for storage of motive power in motor vehicle, e.g. to substitute battery energy storage. Containment vessel is integrated as part of vehicle main structure enabling energy storage per unit mass and power per unit mass to be much greater than for conventional flywheel systems.