Calculation-Analytical Estimation of the Working Cycle Parameters of the Crankless and Crank Engines Under Similar Loading Conditions

  • B. A. SharoglazovEmail author
  • K. D. Podsedov
  • M. K. Kuanyshev
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


The article contains a comparative estimate of the indicators characterizing the working cycle and indicated parameters of each of the engines (in particular, by the indicated value of the tangential and circumferential forces, torque, and indicated power) as applied to similar conditions of use (identifying the cycle conditions, fuel type, identifying the indicated work of the cycle, value of the compression ratio, air excess ration, etc.) in two-stroke internal combustion engines based on the crank mechanism and two-stroke axial engines with identical structural parameters (in particular, cylinder diameter, piston stroke). It is concluded that, for similar conditions of use, the indicator torques formed during the work cycle of these machines are not equal in magnitude. The indicator torque of the CLM engine with a two-period running track of the motion conversion mechanism exceeds the corresponding torque of the internal combustion engine with a crank mechanism by a factor of two. This conclusion also extends to the indicator powers of the thermal machines under consideration.


Crankless piston machine engine Internal combustion engine Working cycle Crank mechanism Indicator work of the cycle Indicator torque 

Accepted Conventions and Abbreviations


Crankless piston machine (further APM—axial piston machine)


Internal combustion engine


Crank mechanism


Working medium


Working cycle


Indicated work of the cycle (for CM-based engines)


indicated work of the cycle (for APM engine)


Average value of the indicated torque (for CM-based engines)


Average value of the indicated torque (for APM engines)


Average value of the tangential force forming the torque in the CM-based engine


Average value of the circumferential force forming the torque of the APM engine

MCM (motion conversion mechanism)

Mechanism converting the reciprocating motion of the piston in the APM engine into the rotary motion of the main shaft


Race track of the MCM (in the general case, it may have N periods)


Reactive diameter of the RT (diameter of the RT centerline in the projection on the plane perpendicular to the engine cylinder axis)


Bottom dead center of ICE and APM engines, respectively (characteristic positions of the piston during the period of the working cycle)


Top dead center of ICE and APM engines, respectively (characteristic positions of the piston during the period of the working cycle)



The article was prepared in connection with the work plan envisaged by the Memorandum (date of conclusion May 3, 2017) between SUSU (State University) and ARGU (RK).


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • B. A. Sharoglazov
    • 1
    Email author
  • K. D. Podsedov
    • 2
  • M. K. Kuanyshev
    • 2
  1. 1.South Ural State UniversityChelyabinskRussia
  2. 2.Aktyubinsk Regional State University of K. ZhubanovAktobeKazakhstan

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