New Zetor 16-valve 4-cylinder engine

On the traditional technical conference of users of CAD system Pro / ENGINEER (SUPro2009, 25th and 26th May 2009 at Hrotovice) were presented news from the world of modern design in Pro / ENGINEER and tips for optimal design of all systems of PTC company. During the conference had been announced the results of a competition in design in Pro / ENGINEER AWARDS 2009 . See www.aveng.cz.

The new 16-valve four-cylinder Zetor engine, one of the Development Institute of Tractors´s project, won the competition in Detailed design products how the special evaluating academy has decided.
Ideological concept of the project was conceived as an evolution of an existing range of four-cylinder ZETOR engines. It is completed by a new 16-valve cylinder head. Within the forthcoming EU and EPA legislation in 2012 - Tier IIIB, which limit emissions in exhaust gases, it was the target to meet the required parameters of the standard.

From the beginning, 3D conceptual design to the processing of several options of solution there were used Pro / ENGINEER system. This option of solution was then processed into structural form of the individual nodes using the methodology TOP-DOWN. Whole project of a new cylinder head has been fully constructed in Pro / ENGINEER WILDFIRE 4. By all new components was consulted the technology from the beginning through the 3D data in all selected foundries and machining shops. 3D models of the intake channels and their flow has been optimized by using FEM flow simulation. From the final Pro / E drawings at the end of the project was made a set of prototypes of engines, which are now in long-term operational tests.

The new 16-valve cylinder head and change of the surrounding functional accessories is the most important but also the most difficult innovation of this project. The head has two intake and two exhaust valves and a completely new control of these valves. The main advantages of this solution are:

  1. increasing power to 95 kW, compared with the existing engine it is an increase of 5kW
  2. increasing gearing moment approximately of 100 Nm compared with the existing engine. The new engine achieves 400 Nm at 1000 rpm
  3. significant reduction in consumption particularly in the nominal rotation speed
  4. improvement the circulation of coolant and thus increasing of the efficiency of the cooling system, which means that even for the improved performance parameters of the engine we can use the existing cooling systém

During measuring the engine at the Institute for Research in Motor Vehicles are all key parameters validated and the measurement results indicated that the engine is poised to meet the upcoming demanding emission legislation. It means that the engine is developmentally prepared in advance and engine parameters are quite competitive. Using multi-valve technology seems to be a good way and prominent tractor brands such as John Deere and SAME/Deutz proceed this way


A renowned professional magazine with agricultural issues AGRICULTURAL MACHINERY No. 7 / 2009 published about this engine an artikle and image information, for details see www.agroweb.cz