HY4D20M diesel engine
Main technologies：Forced water cooling, ω-type combustion chamber, 16 valves, DHOC, Hydraulic Lash Adjuster(HLA), Roller Finger Follower(RFF), 2000bar E-controlled HP-CR Fuel System, E-controlled VGT Turbocharger L&HP-EGR, Variable swirl intake Port, LNT + DPF + SCR.
Improved the turbo lag. Achieved good acceleration response. The turbocharger will be activated from 1000r/min and can reach to peak torque of 400N.m under 1400r/min, and will continue to 2800r/min. Excellent acceleration at start and on the way, minimum fuel consumption rate 205g / kW • h. Boost pressure closed-loop control. The engine operation is smooth.
Hot-end arrangement: Avoiding carbon deposits on the valve. Cooling design: Avoiding heating the intake air. Electric control valve: Precise control of exhaust gas flow. Self-learning strategy: Correct valve opening and exhaust gas flow in real time.
2000bar fuel system
The fuel atomization is good and the combustion is sufficient, which reduced the fuel consumption and PM. Multiple injections can be achieved in each cycle, the combustion process is accurately controlled to improve fuel consumption and emissions.
Variable intake swirl
The swirl ratio can be adjusted in the range of 0 to 1.2. The swirl intensity and flow coefficient can be adjusted in real time according to the needs of the combustion to increase power and improve fuel consumption and emissions.
The bottom layout makes the structure compact. It is easy to assemble and the engine and vehicle NVH performance is good, which can make the driving more comfortable.
Adopted weight-reduction solutions like 3mm thin-wall cylinder block, aluminum cylinder head and plastic manifold, reduced weight but not quality. While maintaining the same performance and reliability, the engine weight is controlled below 192kg, which improves energy density, specific power 0.625kW / kg, and specific torque 2.1N • m / kg.
|Compression ratio||16.2:1||Idle noise (dB)||68|
|Length, width and height||654×730×818||Engine weight（kg）||190|
|Ignition sequence||1-3-4-2||Bore diameter × Stroke (mm)||83.1×92|
|Environmental standards||CN 6b||Fuel form||Vehicle diesel|
|High performance version max Torque / speed（N.m/rpm）||400/1500-2500||High performance version Maximum power / speed (kW / rpm)||120/3600|
|Low performance version max Torque / speed（N.m/rpm）||330/1400-2800||Low performance version Maximum power / speed (kW / rpm)||110/3600|
|Full load noise||95|