D Series Diesel Engine for Express Bus and Coach Manufacturer

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
Diesel Engine	Engine Model	Displacement (L)	Aspiration	kW	ps	r/min	N.m	r/min	Emissions Level
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
Natural Gas Engine	Engine Model	Displacement (L)	Aspiration	kW	ps	r/min	N.m	r/min	Emissions Level
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