WP4 marine diesel engine develops from Deutz 226B-4C family with improved structure, increased strokes, and higher displacement, which significantly enhance its reserve power. Strictly in line with German standards, this series engine is equipped with round reentrant ω-shaped combustion chamber, low-vortex cylinder lid, low flow-resistant intake system, and efficient supercharger, which improve combustion greatly. Moreover, its two-degree balancing mechanism effectively reduces vibration and noise. 

The WP4 series have passed the International Association Classification Society Certificates of CCS,ZY,ABS, GL,BV,DNV ,RS and LR.

 This series is ideally used on river transport ships, fishing boats and public vessels.