A generalized irreversible thermal Brownian motor cycle and its optimal performance Congzheng Qi, Lingen Chen, Zeming Ding, Yanlin Ge and Huijun Feng Eur. Phys. J. Plus, 136 11 (2021) 1120 Published online: 08 November 2021 DOI: 10.1140/epjp/s13360-021-02124-1