Improvements in Heavy-Duty Vehicle Systems

solutions. International Journal of Engine Research. 2016;**17**(1):86-96

*Numerical and Experimental Studies on Combustion Engines and Vehicles*

aircraft engine. SAE Technical Paper

[23] Wang C, Zhang F, Wang E, Yu C, Gao H, Liu B, et al. Experimental study on knock suppression of spark-ignition engine fuelled with kerosene via water injection. Applied Energy. 2019;**242**:

2013-01-1629

248-259

[16] Battistoni M, Grimaldi CN, Cruccolini V, Discepoli G. Assessment of port water injection strategies to control knock in a GDI engine through multi-cycle CFD simulations. SAE Technical Paper 2017-24-0034

[17] Miganakallu N, Naber JD, Rao S, Atkinson W, Barros S. Experimental investigation of water injection technique in gasoline direct injection engine. In: Proceedings of the ASME 2017 Internal Combustion Engine Division Fall Technical Conference;

October 15-18 2017. Seattle,

[18] Kim J, Park H, Bae C, Choi M, Kwak Y. Effects of water direct injection on the torque enhancement and fuel consumption reduction of a gasoline engine under high-load conditions. International Journal of Engine Research. 2016;**17**(7):795-808

[19] Wei M, Sa NT, Turkson RF, Liu J, Guo G. Water injection for higher engine performance and lower emissions. Journal of the Energy Institute. 2017;**90**(2):285-299

[20] Anderson EK, Brown AC, Baranski J, Hoke JL. Performance of low-octane fuels in a Rotax 914 engine with advanced knock mitigation strategies. In: 47th AIAA/ASME/SAE/ ASEE Joint Propulsion Conference & Exhibit; 31 July–3 August 2011. San

[21] Baranski J, Anderson E,

Litke P, Grinstead K, Hoke J.

Grinstead K, Hoke J, Litke P. Control of fuel octane for knock mitigation on a dual-fuel spark-ignition engine. SAE Technical Paper 2013-01-0320

[22] Anderson EK, Attard WP, Brown A,

Experimental study of a pre-chamber jet igniter in a turbocharged Rotax 914

Diego, California

**110**

Washington, USA

**Chapter 6**

Engine

**Abstract**

from the value of 19:1 down to 9:1.

**1. Introduction**

systems.

**113**

Application of Variable

Compression Ratio VCR

Technology in Heavy-Duty Diesel

*Paweł Woś, Krzysztof Balawender, Mirosław Jakubowski,*

The chapter presents the application of variable compression ratio VCR technology for an internal combustion engine. The engine's overall construction has been designed as the deep reconfiguration of liquid-cooled, heavy-duty diesel engine of type IFA 4 VD 14,5/12-1 SRW. An eccentric shaft-based sliding

mechanism has been used for changing position of engine cylinder head assembly. By ensuring a high stiffness of the engine layout together with additional sliding mechanism, the combustion chamber volume of the engine can be changed precisely without changing the displacement of the cylinders. In result, the engine compression ratio can be continuously varied during normal engine operation

**Keywords:** heavy-duty diesel engine, compression ratio, variable compression ratio

The desire to limit the adverse external effects associated with the development of motorization and transport, mainly based on the reciprocating internal combustion engine as the primary power source, reveals primarily with limitation the allowable level of emissions of harmful substances in the exhaust gases, that is, carbon monoxide, CO; hydrocarbons, HC; nitrogen oxides, NOx; and particulate matter, PM. Moreover, in the perspective of growing global warming phenomenon and dropping resources of liquid fuels, particular attention is paid to the reduction of fuel consumption and thus CO2 emission. Unfortunately, the physical and chemical rules of working processes in piston engines do not allow to meet all the above requirements in a simple manner. Despite significant progress made in recent years, further improvement of the ecological and energetic parameters of reciprocating engines requires further changes in their design, covering practically all functional

One of the more effective paths, although at the current stage of development is

still having many technical and operational difficulties, is the construction of engines in which the compression ratio becomes a regulation parameter and can be

technology, eccentric mechanism, internal combustion engine

*Artur Jaworski, Paulina Szymczuk and Adam Ustrzycki*
