Design Challenges & Solution in Modifying Compact 4-Stroke Diesel Engine while Adapting D-Cycle Technology
2022-01-0725
3/29/2022
- Content
- This paper reviews application of 2-Stroke D-Cycle (i.e. Differential Stroke) technology to compact tractor 4-Stroke 2.7L 4-Cylinder CRS (Common Rail System) Naturally aspirated (NA) Diesel engine for improving efficiency & power. The study considers design challenges that are presented for accommodating D-cycle technology in engine. The paper also covers resolving those challenges with established technical solutions. Study focuses on modifying conventional compact 4-stroke diesel engine with the intention of keeping design changes minimal for incorporating differential stroke technology. Designing of vertically splitting lightweight piston crown which can smoothly engaged and separated from main piston body without any impact, stem rod which connects piston crown with rocker arm, hollow connecting rod and rocker arm which is actuated by additional camshaft in addition to present camshaft. Lubrication of additional camshaft is done by extending existing oil galleries. Gear train layout modification is completed to convert existing 1:2 ratio between crankshaft & existing camshaft to 1:1 for D-Cycle operation. For ease of assembly of D-Cycle parts, opening is given inside of the crankcase. Opening is later covered by external cover during assembly. D-Cycle engine assembly sequence for manufacturing and weight impact are analyzed. This paper also explains 1D Kinematic analysis performed in GT-SUITE for optimizing D-Cycle mechanism parts dimensions & position.
- Citation
- Telshinge, P., and Paulraj, L., "Design Challenges & Solution in Modifying Compact 4-Stroke Diesel Engine while Adapting D-Cycle Technology," SAE Technical Paper 2022-01-0725, 2022, .