With the aim of improving the energy efficiency of conventional vehicles, this paper proposes a pneumatic hybrid engine concept, which features regenerative braking and compressed-air-assisted cranking functions. In the regenerative braking mode, the engine works as a two-stroke compressor and converts the kinematic energy of the vehicle into compressed air. In the two-stroke air motor mode, a throttle valve in the intake manifold is used to block the ambient air, and an electropneumatic solenoid valve is employed to control the compressed-air injection. The compressor mode is modelled on the basis of thermodynamics and gas dynamics theories and is improved according to the bench test results of a single-cylinder engine converted from a two-cylinder diesel engine. Transient engine cranking tests are also conducted and are discussed. Urban driving-cycle simulation results show that the fuel consumption of a light-duty vehicle with a pneumatic hybrid system can be reduced by 8%.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Research on a pneumatic hybrid engine with regenerative braking and compressed-air-assisted cranking




    Publication date :

    2016




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    RVK:    ZO 4200: / ZO 4200
    BKL:    55.20 / 55.20 Straßenfahrzeugtechnik
    Local classification TIB:    275/7025



    Research on a pneumatic hybrid engine with regenerative braking and compressed-air-assisted cranking

    Wang, Lei / Li, Dao-fei / Xu, Huan-xiang et al. | SAGE Publications | 2016



    HYBRID ELECTRIC VEHICLE ENGINE CRANKING

    MOORE JEREMY / FERREL MARK J | European Patent Office | 2017

    Free access


    Pneumatic Regenerative Engine Braking Technology for Buses and Commercial Vehicles

    Lee, Cho-Yu / Zhao, Hua / Ma, Tom | SAE Technical Papers | 2011