Engine family
Cummins engines made in China: Dongfeng Cummins (DCEC) and Chongqing Cummins (CCEC)
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Sinospect supplies generating sets and engine power packs from China, quotes Cummins-engined units with the engine series on the quotation and the maker and plant in the order contract, and checks each engine’s dataplate against the order before it ships. Send your Cummins set or pack requirement →
Two joint ventures, two size ranges
| Dongfeng Cummins (DCEC) | Chongqing Cummins (CCEC) | |
|---|---|---|
| Partner | Dongfeng Automobile Co., Ltd. | Chongqing Machinery & Electric Co. |
| Cummins share | 50% | 50% |
| Location, founded | Xiangyang, Hubei; 1996, after a B-series licence in 1986 | Chongqing; 1995, Cummins’s first engine joint venture in China |
| Genset engines | B, C and L series: 4B, 6BT, 6CT, 6LT, QSB | NT855/QSN, K19/QSK19, K38/QSK38, K50/QSK50 |
| Displacement, genset range | 3.9–13 L, 24–563 kW | 11–50 L, 200–1,783 kW |
Sources: DCEC company profile and English site; Cummins’s 2024 annual report (10-K) for the 50% shareholdings; CCEC’s company and genset-engine pages (archived copies); the CCEC joint-venture contract was extended to 2040 with the shareholding unchanged (Chongqing Machinery & Electric, HKEX, May 2022).
The genset engines and their ratings
Cummins publishes one G-Drive ratings card for these engines, with prime and standby power for each model at 1,500 rpm. The card does not say which plant builds each engine. By family, the B, C and L series are in Dongfeng Cummins’s genset line-up and the NT855, K19, K38 and K50 in Chongqing Cummins’s; for the exact model on an offer, ask which plant built it.
Source: Cummins G-Drive ratings card, bulletin 6510413, revision 8/26, 1,500 rpm, gross engine power.
| Model | Family made in China by | Prime | Standby |
|---|---|---|---|
| 6BTA5.9-G5 | DCEC | 93 | 102 |
| 6BTAA5.9-G6 | DCEC | 135 | 145 |
| 6BTAA5.9-G7 | DCEC | 145 | 160 |
| 6CTAA8.3-G7 | DCEC | 183 | 203 |
| 6LTAA8.9-G4 | DCEC | 228 | 250 |
| KTA19-G4 | CCEC | 448 | 504 |
| KTA38-G3 | CCEC | 806 | 895 |
| KTA38-G5 | CCEC | 880 | 970 |
| KTA50-G3 | CCEC | 1,097 | 1,227 |
| KTA50-G8 | CCEC | 1,200 | 1,429 |
These are engine shaft powers. The set’s electrical output is lower, after the alternator’s losses and the radiator fan, so compare offers on the set’s kWe and kVA, not the engine’s kWm. Dongfeng Cummins also builds the electronic QSB5.9-G (96–159 kW prime) and QSB6.7-G (151–209 kW prime). Sources: Cummins G-Drive card; Dongfeng Cummins’s QSB5.9-G and QSB6.7-G pages (archived copies).
Emissions
The mechanical engines on the card (6BTA5.9-G5, 6CTAA8.3-G7, 6LTAA8.9-G4, KTA19-G4, KTA38 and KTA50-G3) are listed as non-regulated at 1,500 rpm. Chongqing Cummins’s electronic engines (QSNT, QSK19, QSK38, QSK50) meet China’s non-road Stage III and carry a Chinese disclosure number. A mobile or transportable set placed on the EU market needs an engine type-approved to Stage V; the buyer’s guide covers the EU rules.
Checking the engine
- The dataplate shows the engine serial number (ESN), the control parts list (CPL), the model and the rated power and speed. Cummins says the ESN is in general eight digits and is also on the block if the plate is missing (Cummins).
- QuickServe Online shows the parts catalogue and dataplate data for an ESN, but only to registered owners of Cummins products; it is not an open authenticity check (QuickServe).
- Parts carry Cummins’s hologram or QR labels, checked at scan.cummins.com; Dongfeng Cummins parts carry a 21-digit label (DCEC). These checks cover parts, not whole engines.
- The assembler’s authorisation comes from the joint venture as a dated certificate with a code. When we asked in September 2026, Dongfeng Cummins’s hotline confirmed one seller’s authorisation code by phone, and a Cummins Power Technology marketing contact confirmed another seller’s certificate in writing. Chongqing Cummins posts its 2026 list of authorised genset makers on its site, under “电力主机厂名录” (CCEC), and Cummins China checks a genset maker’s authorisation code for QSG12, QSK50 and QSK60 engines (Cummins China).
On the same file, the dataplate photos the sellers sent did not match what had been specified: an NTA855-G1A plate dated 2018 for a line we had specified as an NTA855-G4, a plate dated 2023 on an engine quoted as 2026 production, and a “unit” photo that was a stock picture taken in 2022. Before paying:
- Photos of the dataplate of each engine on your order, with the ESN readable.
- Model and rating on the plate against the offer: NTA855-G1A and NTA855-G4 are different engines.
- Production date on the plate against “new production”.
- The assembler’s authorisation certificate, its date and the legal entity named on it.
- At the factory test, the same ESN on the engine, the test report and the packing list.
Warranty
| Rating | Base warranty | Major components |
|---|---|---|
| Standby | 24 months / 400 h | 36 months / 600 h |
| Prime, unlimited hours | 12 months / unlimited | 36 months / 10,000 h |
| Prime, limited hours | 12 months / 750 h | 36 months / 2,250 h |
| Continuous | 12 months / unlimited | 36 months / 10,000 h |
Outside mainland China, Cummins’s published local warranty applies (CCEC warranty, archived). Cummins’s worldwide generator-drive warranty terms (July 2008 edition) have the same base terms; their extended cover on major components does not apply to B and C series engines, and non-Cummins accessories such as the alternator, starter, fan, filters and air cleaner are excluded. We found no published Dongfeng Cummins genset warranty. For a loose engine power pack bought through an assembler, nobody we asked in 2026 would say whether the factory warranty applies: get the warranty holder and the claim route in writing.
A Cummins-engined set at its factory test
Two 2 MVA, 11 kV sets with Cummins QSK60 engines, Stamford alternators and Deep Sea controllers, assembled in China, were load-tested in steps to 110% of prime power before shipment. Five deviations were recorded and closed before the sets left the plant. The case study follows the order from the test to the site.
Frequently asked questions
Are Cummins engines made in China genuine Cummins engines?
Yes. Dongfeng Cummins and Chongqing Cummins are joint ventures Cummins owns 50% of, and their genset engines carry Cummins model names and ratings on Cummins’s G-Drive card. What needs checking is the individual unit: that it is the model offered, that its production date fits “new”, and that the assembler or dealer is authorised by the joint venture.
What is the difference between DCEC and CCEC?
Size. Dongfeng Cummins (DCEC), founded in 1996 with Dongfeng, builds the smaller B, C and L series, 3.9 to 13 litres, rated about 24 to 563 kW as genset engines. Chongqing Cummins (CCEC), founded in 1995 and now a joint venture with Chongqing Machinery & Electric, is Cummins’s high-horsepower base in China and builds the NT855, K19, K38 and K50 families, 11 to 50 litres, rated about 200 to 1,783 kW.
Where is the serial number on a Cummins engine?
On the engine dataplate, which shows the engine serial number (ESN), the control parts list (CPL), the model and the rated power and speed. Cummins says the ESN is in general eight digits, and that it is also stamped on the block if the dataplate is missing or unreadable. The operator manual’s “Engine Identification” section shows where the plate sits on each engine.
What warranty does a Cummins genset engine from China carry?
Chongqing Cummins publishes its generator-drive warranty for mainland China: 24 months or 400 hours for standby, 12 months for prime and continuous ratings, with longer cover on major components. Outside mainland China, Cummins’s published local warranty applies. We found no published Dongfeng Cummins genset warranty. On a set, the assembler’s warranty covers the set; ask in writing who handles an engine claim in your country.
Cummins-engined sets and power packs
Sinospect supplies generating sets from 50 to 275 kVA and engine power packs from China, quotes Cummins-engined units with the engine series on the quotation and the maker and plant in the order contract, and witnesses the factory test of sets bought directly: see generator FAT witnessing. The other engine families are on the engine makers page.
Buying a set or power pack with a Cummins engine from China?
Send the engine model or the rating you need. Sinospect quotes with the engine series on the quotation and the maker and plant in the order contract, and checks the engine’s dataplate against the order before it ships.