What is DCEC?
DCEC mainly manufactures DCEC designed medium and heavy-duty engines, which include B, C, D, L, Z series,covering displacement of 3.9L, 4.5L, 5.9L, 6.7L, 8.3L, 8.9L, 9.5L and 13L and power ranged from 80 to 680 HP, meeting China’s NSV, NSVI, and CS IV emission standards, which are widely used in light, medium and heavy-duty trucks, urban bus and shuttle, construction machinery, marine and generator sets.
Company Introduction: DCEC Engine Company
DCEC mainly manufactures DCEC designed medium and heavy-duty engines, which include B, C, D, L, Z series, covering displacement of 3.9L, 4.5L, 5.9L, 6.7L, 8.3L, 8.9L, 9.5L and 13L and power ranged from 80 to 680 horsepower.
What is D4.0NS6 Engine?
DCEC D4.0NS6 series automotive engine is four-strokes engine with 102 mm bore and 120 mm stroke, Equipped with Bosch (or BYC or Weifu) pump. engine comes with turbocharger and Air- Air intercooler. The prime power range is from 147 HP to 191 HP.
D4.0NS6B185 Automotive Engine
DCEC D4.0NS6B185 automotive engine is a 4-cylinders in line, 4 liter four-strokes engine with 114 mm bore and 145 mm stroke, equipped with Bosch vp44 and RQV-K governor. DCEC D4.0NS6B185 automotive engine comes with turbocharged and charge air cooled, with a EURO III post-processor.
About D4.0 National VI Engine: Compact Size with Powerful Performance
The D4.0 National VI engine is a high-performance, cost-effective powertrain solution tailored for light-duty commercial vehicles. First, it is necessary to clarify the naming rules of this engine type. The naming system of DCEC National VI engines consists of four core parts. The initial letter represents the engine series, such as “D” in D4.0. The following Arabic numerals indicate the displacement, with 4.0 meaning 4.0L and displacements of 9L and above expressed as integers. The “NS6B” in the model stands for the National VI Stage B emission standard, and the trailing numbers refer to the rated power in metric horsepower, like 185 in D4.0NS6B185 which means 185PS.
Boasting a horsepower range of 150-195PS and a maximum torque of up to 730N.m, with a low-speed torque of 520N.m at 1000rpm, this 4.0L engine delivers impressive power output. Its superior power density is evident in the industry-leading power per liter of 36.2kW/L and torque per liter of 181.8Nm/L, outperforming many counterparts. With an extended economic speed range of 1100-1800rpm, it ensures excellent acceleration, starting and climbing capabilities, making it ideal for 4×2 cargo trucks, urban logistics vehicles, special-purpose vehicles and passenger cars.
Weighing only 340kg, the D4.0 engine is among the lightest in its class, which helps enhance vehicle load capacity and reduce overall fuel consumption. Its optimized design features a no-EGR system, highly integrated components including water pumps, wire harnesses and urea pipes, and a single-cylinder aftertreatment system. These designs not only simplify the structure (with only over 380 BOM parts for installation) but also improve combustion efficiency and lower back pressure, cutting fuel consumption by 1%.
The engine is equipped with an intelligent fuel consumption management system, which includes smart torque coordination, GPS-based cruise control, intelligent coasting and no-load mode protection. These functions achieve 1%-2% fuel saving without manual intervention. Supported by Cummins Connected Solutions Cloud, it also enables big data analysis, remote locking, calibration download and fleet management for enhanced operational efficiency.
In terms of quality and reliability, the D4.0 engine undergoes rigorous validation tests, including 840,000 km of road tests with 12 vehicles and extreme “Three Highs” tests (from -30℃ to 45℃ and at an altitude of 5,000 meters). It adopts advanced technologies like NanoNet™ filtration system, low-friction power cylinder components and CMR casting process pistons, ensuring long service life and low maintenance costs. All these advantages make the D4.0 National VI engine a top choice for customers pursuing high efficiency and economy.
DCEC D4.0NS6 series electronic automotive engine can reach upto EU Stage VI emission standard, the number 30/40/50/60 are the emission standard mark of engine, which means engine emission standard are EU Stage III, IV, V, VI. For different emission standard DCEC D4.0NS6 electronic series automotive engine, the engine itself are the same, the major different are the after-treatment system and ECU program, EMAC will keep updating products introduction page of different emission standard version engines, welcome to subscribe our website to get latest update information.
For different emission standard D4.0NS6 series electronic series automotive engine, the engine itself are the same, the major different are the after-treatment system and ECU program.
DCEC D4.0NS6 series automotive engine is four-strokes engine with 102 mm bore and 120 mm stroke, equipped with Bosch (or BYC or Weifu) pump. DCEC DCEC D4.0NS6 automotive engine comes with a Turbocharger and Intercooler, with a Euro V post-processor.
As part of EMAC, DuraMac provides complete powertrain that integrated with DCEC engine, Fast-Eaton clutch, FAST-CAT transmission, DANA axle and Komman air suspension, while the electrification of automobile is the certain future, Duramac also get involved with EV powertrain system.For more information about ConeMac and our related products, you are welcome to visit DuraMac homepage: www.duramac.com.
“A promise is A promsie”, EMAC continuously upgrade our products design and quality standard. We will continuously improving our product quality and service standard to meet the satisfactions for customers from all over the world.
Thanks for your time with us, welcome to contact DuraMac at anytime, For more details about our company, products and services, you are welcome to visit our homepage www.duramac.com
Advantages of D4.0NS6B185 Automotive Engine
- Lower oil consumption，Extended stroke，the expansion of the combustion gas more fully, Increase effective efficiency output, the economy is better.
- Strong power，advanced 4 air valves structure, greater horsepower, air burning more thoroughly, while making low speed torque increase, quicken response speedily, climb strongly.
- Excellent reliability, with compulsive cold cut articulated pistons, Can bear extreme high mechanical load and heat load, Strength can be comparable with heavy engine.
- Better emissions, Decorate injector and symmetrical combustion chamber in center, make the cylinder is more homogeneous mixture, burning more fully, lower emissions.
- Super life, 30 % engines 800,000 km without overhaul.
- Excellence power, Clean burning, use the advanced lean-burn closed loop electronic control system.
- Excellent cold start performance, equipped with air suction electric preheater and 7.8 kw power starter, completely improve the cold start performance of the engine. Through the arctic village-MoHe of China – 36 °C extreme low temperature validation.
DCEC D4.0NS6B185 automotive engine is a 4-cylinders in line, 4 liter four-strokes engine with 114 mm bore and 145 mm stroke, equipped with Bosch vp44 and RQV-K governor. DCEC D4.0NS6B185 automotive engine comes with turbocharged and charge air cooled, with a EURO III post-processor.
The prime power at 2400 RPM of DCEC D4.0NS6B185 automotive engine is 182 HP.
Committed to providing reliable premium power systems for global automotive machinery manufacturers, DuraMac is a Sub-brand of the EMAC Group that focuses on automotive machinery applications.
Based on dozens of world-class engine manufacturing resources in China, and as official exporting agent of Fast transmission and Dongfeng Dana axle, Duramac provides one-stop solutions from pre-design to components supply, from installation to commissioning, from pre-sales communication to after-sales service support. Duramac’s product range includes Caterpillar, Deutz, CAMC, Weichai, and other well-known brands of automotive machinery engines, related accessories, and complete power packs.
What DCEC-Dongfeng D4.0NS6 Automotive engine using for?
The DCEC-Dongfeng D4.0NS6 Automotive engine is a highly popular engine model suitable for a wide variety of vehicles. It is extensively used across different applications, including commercial vehicles, buses, school buses, trucks, fire trucks, off-road vehicles, and various vehicle transportation scenarios.
Many world-leading automotive equipment brands also utilize the DCEC-Dongfeng D4.0NS6 automotive engine as the driving power for their vehicles. These include Foton Auman, Dongfeng, Volvo, Ford, Iveco, Ram Trucks, Yutong, and Zhongtong Bus.
Cummins employs a full range of engines for all its equipment. We can supply all models of Cummins automotive engines, including: B140-33, B190-33, EQB125-20, EQB160-20, EQB180-20A, EQB190-20, EQB210-20A, EQB235-20, B170-33, B210-33, EQB140-20, EQB170-21, EQB180-20B, EQB190-21, EQB210-20B, C220-10A, C230-10, C245-20A, C260-20, C280-20, C300-20B, C220-10B, C240-10, C245-20B, C260-33, C300-20A, C325-20, L300-20, L340-20, L360-20, L375-30, L325-20, L340-30, D4.0NS6B195, D4.0NS6B170, D4.0NS6B195-ll, F2.5N56B130-1, F2.5N56B130-1I, F2.5NS6B150, F2.5NS6B170, F3.0NS6B195-1, F3.0NS6B195-lI, F3.0NS6B200, ISF3.8s3154, ISF3.8e4R168, ISB3.9-125E40A, etc.
EMAC is a professional one-stop solution provider for the engine replacement for Komatsu, Belaz, Volvo, Hitachi, Liebherr machines, based on the original engines produced in different engine joint ventures in China, we offer DCEC-Dongfeng, CCEC-Chongqing, XCEC-Xi’an engines to replace original engines on these machines.
Based on the customer’s original engine serial number, we can check and confirm the old engine’s configuration in our system. We then provide a one-stop engine replacement solution encompassing design, engine supply, modification work, and installation/commissioning support. We can also provide on-site installation and commissioning support with our professional engineering team for an additional charge.
How Many Different Options for the DCEC-Dongfeng D4.0NS6B185 Automotive Engine Are Available in China?
There are several different configuration options for the DCEC-Dongfeng D4.0NS6B185 automotive engine, as listed below:
- Standard DCEC Original D4.0NS6B185 automotive engine without any modifications. This is the most affordable option among all original automotive. However, customers may face numerous problems during the replacement of the old engine due to differences in many connection points and external parts. Its low cost is because it includes no additional charges for modification accessories.
- Modified engine according to the original serial number, but supplied WITHOUT the flexible coupling (often mistakenly called a flywheel) and the engine fan clutch. Customers can install this engine as a replacement without issues but must reuse the flexible coupling and fan clutch from their old engine, as these parts are typically still in good condition and are very expensive to purchase separately. This engine incurs additional modification costs but helps reduce overall expense by avoiding the purchase of the costly flexible coupling and fan clutch.
- Modified engine according to the original serial number and supplied WITH all necessary accessories. This is the most expensive option but is very convenient for the customer. No additional work is required; the customer simply removes the old engine and installs our engine into the machine.
Why there are so many different prices for DCEC-Dongfeng D4.0NS6B185 automotive engine?
Price is never a definitive barrier with Chinese suppliers—you can find virtually any price point you seek, especially on platforms like Alibaba. If you are solely price-oriented, you will find corresponding offers.
There are many reasons behind the low prices of some DCEC-Dongfeng D4.0NS6B185 automotive engines. All customers should clearly understand exactly what product a supplier is offering before focusing solely on the price.
There are lots of trickies to lower down the costs:
1. Assemble Engine: This means companies who assembly the EQB/B engine with parts at workshop outside, this is normally related to reconidition engines as well, which they will use lots of 2nd hand parts to lower down costs, and for the new parts, they also using the copy parts.
3. Copy Engine: There are lots of companies in China living on produce copy engines, you can read attached files to learn more about copy engine market, you can also watch our National TV news about policeman arrested people who make copy engines: https://youtu.be/0y-OXQv4bms?si=2yeTHAnFiNZ5mOxN
Dongfeng offers technical support to help customers to identify if the engine is genuine or not, for more details about how to identify Dongfeng Genuine Engine or not, you can read our relevant article to find out details.
EMAC can’t give you solution or answer for CHEAP products, but if you need reliable partner, EMAC is your best choice with highest quality standard, and reasonable prices. MOST important thing, EMAC always do what we say, and we never trying to cheat our customer, and we will not do this forever, we are doing our work as lifetime career, not as short-run business that only chase on quick money!
