D Series Diesel Engine for Express Bus and Coach

D Series Diesel Engine for Express Bus and Coach
D Series Diesel Engine for Express Bus and Coach
D Series Diesel Engine for Express Bus and Coach
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Description
The SDEC D series diesel engine features a high reliability, good fuel economy and fast transient load response. It is an outstanding representative of recently designed and leading technical indexes among domestic proven engines. With three optional engines of 5.3, 9.3 and 8.8L, the applicable power ranges from 132 to 375 Ps, making it the preferred power for medium sized passenger buses and city busses.

The prototype of D series is jointly designed with the Austrian company AVL to adapt to Chinese oil quality and user habits. In 2005, SDEC cooperated with the American SwRI to carry out reinforcing design and 4-valve upgrade following North American heavy-duty diesel engine standards. Meeting China IV and China V emission standards, this series engine has been selling well for 20 years, with currently more than 1 million sets in circulation.

Outline dimensional drawing
  • SC5D
  • SC9D
Technical parameters
Diesel Engine Engine Model Displacement (L) Aspiration Rated Power Peak Torque Emissions Level
kW ps r/min N.m r/min
5DK SC5DK180 5.3 TA 132 180 2300 660 1400 China IV
5DK SC5DK200 5.3 TA 147 200 2300 730 1400 China IV
8DK SC8DK230 8.3 TA 170 230 2200 900 1400 China IV
8DK SC8DK240 8.3 TA 177 241 2200 960 1400 China IV
8DK SC8DK250 8.3 TA 184 250 2200 1000 1400 China IV
8DK SC8DK260 8.3 TA 192 260 2200 1100 1400 China IV
8DK SC8DK280 8.3 TA 206 280 2200 1160 1400 China IV
9DK SC9DK280 8.8 TA 206 280 2200 1160 1400 China IV
9DK SC9DK310 8.8 TA 228 310 2200 1250 1400 China IV
9DF SC9DF240 8.8 TA 177 240 2200 970 1400 China IV, China V
9DF SC9DF260 8.8 TA 192 260 2200 1100 1400 China IV, China V
9DF SC9DF280 8.8 TA 206 280 2200 1160 1400 China IV, China V
9DF SC9DF300 8.8 TA 221 300 2200 1250 1400 China IV, China V
9DF SC9DF320 8.8 TA 235 320 2200 1350 1400 China IV, China V
9DF SC9DF340 8.8 TA 251 340 2200 1450 1400 China IV, China V
Natural Gas Engine Engine Model Displacement (L) Aspiration Rated Power Peak Torque Emissions Level
kW ps r/min N.m r/min
SOT SC5DT180 5.3 TA 132 180 2300 650 1500 China V
8DT SC8DT230 8.3 TA 170 230 2000 830 1300 China V
8DT SC8DT250 8.3 TA 184 250 2000 920 1300 China V
9DT SC9DT280 8.8 TA 206 280 2000 1120 1300 China V
9DT SC9DT300 8.8 TA 221 300 2000 1150 1300 China V
9DT SC9DT320 8.8 TA 235 320 2000 1200 1300 China V
Features
D Series Technical advantages and features Customer value
Fuel system It adopts Japan Denso third generation of electronic control system with a maximum injection pressure of 1800bar. The DLC coated fuel injector of Denso patented technology can reduce the corrosion and wear of oil nozzle. Multiple injection can be realized in sequential working conditions to ensure uniform atomization and full combustion. This engine meets China IV and China V emission standards. The oil consumption is reduced by 10-15%, with a long service life.
Gas system It uses a single point injection gas supply mode and two control strategies: lean burning and mixed burning (lean burning + equivalent burning). The controller (ECU), sensor, electronic throttle, sparking coil, spark plug and other key components are all from internationally known brands, and meet Chinese V emission standards. This system is advanced and reliable.
Aspiration method With optional 2-valve and 4-valve products, an optimized combustion chamber and swirl ratio airway, the turbocharger is selected based on various working conditions, power and torque requirements. This achieves a higher air intake efficiency and improves the combustion efficiency. With its high power density and fast transient load, the maximum torque reserve is up to 40%. With a low fuel consumption, the operation cost is low. It has a fast transient load response, strong power and outstanding adaptability to working conditions.
Design features In cooperation with AVL and SwRI, this product meets North American heavy-duty diesel engine standards. With a high strength cylinder head and engine block, 4-valve structure and 180bar peak pressure, all the parts are designed as 295kW. Using an integral design, the parts are 20% less than the regular diesel engines. Compared to same power engines available on the market, it has a simpler and smaller structure.
The 217Ps in-cylinder brake power is an option offered to meet better auxiliary braking functions.
This engine has an excellent reliability and low downtimes. The overall arrangement is flexible. A high power in-cylinder brake results in a high driving safety.
Reliability features Designed following 295kW heavy-duty diesel engine designs, it has a high reliability margin. With advanced machining and assembly lines, it is controlled by an MES system. By referencing the SPS system guarantee in German Volkswagen manufacturing standards, the product has a better consistency. With advanced and reliable international first-class accessories, this engine has been selling well for 10 years as the preferred power of commercial vehicles. It is advanced, mainstream, reliable and reassuring.
Matching adaptability With an optional displacement of 8.3L and 8.8L and optional engine of diesel and natural gas, the power ranges from 105kW to 275kW. Electronically controlled common rail and natural gas systems are developed and manufactured on one platform. The electronic controlled engine supports GPS, cruising and other functions. Without an auxiliary air intake heating device, the cold starting temperature is -15℃. According to the assembly configuration and actual operating conditions, the engine and assembly are conducted for matching optimization and customization. Various configurations for the flywheel, flywheel house, engine, air compressor, steering pump and other peripheral parts are provided to choose from. There are also different structures and types to choose from for the PT0 and oil pan. This engine has a wide application range and good environmental adaptability. It has an optimized power performance and economy.

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SDEC diesel engine, bus engine, highway bus diesel engine, coach engine

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