CCEC QSK23 Generator Drive Engine — 603–816 kW (750–1,020 kVA)
The CCEC QSK23 series is the high-output 23-liter workhorse of the Cummins Quantum electronic engine family, built by Chongqing Cummins Engine Co. (CCEC). This 6-cylinder inline, four-stroke diesel uses the Cummins HPI PT electronic fuel system with the G-Drive Governor Control System (GCS), delivering 603–816 kW prime power across 50 Hz (1500 RPM) and 60 Hz (1800 RPM) ratings. It fills the gap between the 19-liter QSK19 and the V12 KTA38, making it the preferred single-engine solution for 750–1,000 kVA generator sets in data centers, mining, oil & gas, and large industrial standby.
QSK23 Generator Engine Models
CCEC produces nine QSK23-series G-Drive ratings spanning 50 Hz and 60 Hz. Ratings below are published genset outputs (kVA / kW) at 0.8 power factor. The higher the G-number within a frequency, the higher the power density.
50 Hz Models (1500 RPM)
| Engine Model | Prime Power | Standby Power | RPM |
|---|---|---|---|
| QSK23-G5 | 753 kVA / 603 kW | 753 kVA / 603 kW | 1500 |
| QSK23-G2 | 825 kVA / 660 kW | 825 kVA / 660 kW | 1500 |
| QSK23-G8 | 854 kVA / 684 kW | 854 kVA / 684 kW | 1500 |
| QSK23-G3 | 900 kVA / 720 kW | 900 kVA / 720 kW | 1500 |
| QSK23-G9 | 900 kVA / 720 kW | 900 kVA / 720 kW | 1500 |
60 Hz Models (1800 RPM)
| Engine Model | Prime Power | Standby Power | RPM |
|---|---|---|---|
| QSK23-G5 | 838 kVA / 670 kW | 838 kVA / 670 kW | 1800 |
| QSK23-G2 | 957 kVA / 766 kW | 957 kVA / 766 kW | 1800 |
| QSK23-G6 | 963 kVA / 771 kW | 963 kVA / 771 kW | 1800 |
| QSK23-G3 | 1,010 kVA / 808 kW | 1,010 kVA / 808 kW | 1800 |
| QSK23-G7 | 1,020 kVA / 816 kW | 1,020 kVA / 816 kW | 1800 |
Core Specifications
| Parameter | Value |
|---|---|
| Engine Type | 4-cycle, inline 6-cylinder |
| Displacement | 23 L |
| Bore × Stroke | 170 mm × 170 mm |
| Rated Speed | 1,500 – 1,800 RPM |
| Frequency | 50 Hz / 60 Hz |
| Fuel System | Cummins HPI PT electronic fuel injection |
| Governor / Control | G-Drive Governor Control System (GCS), off-engine, in genset panel |
| Aspiration | Turbocharged (CTT HX82), charge air cooled (air-to-air CAC) |
| Cooling | CoolPac integrated cooling package with air cleaner kit |
| Rated Power Range | 531 – 736 kW @ 1,500 – 1,800 RPM |
| Prime Power Range | 603 – 816 kW |
| Genset Output | 753 – 1,020 kVA (at 0.8 PF) |
| Dry Weight | 3,185 kg |
| Packing Size (L × W × H) | 2,885 × 1,656 × 2,029 mm |
| Starting System | 24V, negative ground |
| Manufacturer | CCEC (Chongqing Cummins Engine Co., Ltd.) |
Key Engineering Features
HPI PT Electronic Fuel System
The Cummins High Pressure Injection (HPI) PT system uses electronic control to meter fuel with precision across the entire load range. The result is stronger performance, better fuel efficiency, and lower emissions than a purely mechanical PT pump — without the complexity of a full common-rail layout.
G-Drive Governor Control (GCS)
The governor is mounted off-engine inside the genset control panel rather than on the engine block. This simplifies maintenance, allows flexible control-panel design, and improves overall system reliability by keeping sensitive electronics away from engine heat and vibration.
HX82 Turbo + Charge Air Cooling
The Cummins Turbo Technologies HX82 turbocharger delivers high airflow for sustained high-load operation. Paired with an air-to-air Charge-Air-Cooler (CAC), it keeps intake temperatures low for dense, efficient combustion and reduced emissions.
Quantum Engine Protection
The integrated Quantum control package monitors oil pressure, coolant temperature, and engine speed, automatically derating or shutting down to prevent catastrophic damage. It offers cost-effective control with the design flexibility to integrate with modern paralleling switchgear.
The CoolPac integrated design ships as a complete, matched package — engine, cooling system, and air cleaner kit developed together for G-Drive duty — so components integrate seamlessly and the unit is durable and high-performance straight from the crate.
Fuel Consumption (Typical)
Fuel is 70–80% of a generator set’s lifetime operating cost, so right-sizing matters. The figures below are typical estimates for a QSK23-class 23-liter electronic engine at 1500 RPM (50 Hz); exact values vary by model rating, alternator efficiency, ambient conditions, and fuel quality. Request the factory fuel map for your specific model before finalizing a project.
| Load Point | Typical Power (kW) | Fuel Consumption (L/hr, approx.) |
|---|---|---|
| Standby (100%) | ~720 | ~200 |
| Prime (100%) | ~660 | ~180 |
| Prime (75%) | ~495 | ~140 |
| Prime (50%) | ~330 | ~98 |
Generators run most efficiently at 70–80% load. Running a QSK23 below 30% load for long periods causes wet stacking (carbon buildup) and shortens engine life. If your continuous load is under ~500 kVA, the smaller QSK19 will burn less fuel overall; above 1,000 kVA continuous, step up to the V12 KTA38 or KTA50.
QSK23 vs QSK19 vs KTA38: Selection Guide
The QSK23 sits in a sweet spot of the CCEC lineup — a single inline-six that reaches 1,000 kVA without stepping up to a heavier V12. Here is how it compares to its neighbors.
| Feature | QSK19 (Electronic) | QSK23 (Electronic) | KTA38 (V12 Mechanical) |
|---|---|---|---|
| Displacement | 18.9 L | 23 L | 37.8 L |
| Cylinders | 6 inline | 6 inline | 12 Vee |
| Fuel System | MCRS common rail | HPI PT electronic | PT + STC mechanical |
| 50 Hz Prime Range | 402 – 667 kW | 603 – 720 kW | ~560 – 900+ kW |
| Genset kVA Range | 500 – 800 kVA | 750 – 1,020 kVA | 700 – 1,500 kVA |
| Dry Weight | ~1,900 – 1,972 kg | 3,185 kg | ~3,950 kg |
| Best For | 500–800 kVA, regulated markets | 750–1,000 kVA single inline-six | 1,000+ kVA, mining, redundancy |
Choose the QSK23 when you want near-1,000 kVA from a single, simpler inline-six platform with electronic control and diagnostics — easier to service and lighter on spares than a V12, yet more powerful than the QSK19. For a full picture of how the mechanical K-series compares, see our NTA855 vs KTA19 vs KTA38 vs KTA50 comparison guide.
Typical Applications
- Data centers & server farms — 750–1,000 kVA standby and prime power with electronic governing and J1939 integration into UPS and paralleling systems.
- Mining & quarrying — primary power for crushers, conveyors, dewatering pumps, and mining camps in high-altitude, high-dust conditions.
- Oil & gas — onshore drilling rigs, pump stations, and pipeline operations requiring continuous-duty reliability.
- Hospitals & critical facilities — large backup systems where tight frequency regulation and engine-protection shutdowns are essential.
- Commercial & industrial standby — large hotels, malls, airports, water treatment, and manufacturing plants needing 800–1,000 kVA backup.
- Construction & rental fleets — containerized 800–1,000 kVA units for large infrastructure projects, events, and disaster relief.
- Prime power — remote & island sites — dependable 24/7 power where the grid is unreliable or absent.
Genuine QSK23 Spare Parts
The QSK23 shares Cummins’ global parts network, and genuine CCEC/Fleetguard components are readily available. We supply the full range of QSK23 spare parts, including the cylinder block (4310384), cylinder head (4096557D), cylinder head gasket (4095440), ECM electronic control module (4921411), idler gear (4365226), and flywheel (4096657). Browse the full Cummins engine parts center for filters, turbochargers, injectors, and overhaul gasket kits.
Maintenance & Service
| Service Item | Interval (typical) | Notes |
|---|---|---|
| Engine oil & filter | 250–500 hours | API CH-4/CI-4 or higher, 15W-40 |
| Fuel filters / water separator | 500 hours | Drain water regularly; use genuine Fleetguard |
| Air filter | Inspect 500 h / replace as indicated | Dry element with restriction indicator |
| Coolant / SCA check | 500 hours | Maintain DCA concentration in CoolPac system |
| Valve lash adjustment | 2,000 hours / 2 years | Cold setting per CCEC/Cummins manual |
| ECM / GCS diagnostic check | At each service | Read fault codes via Cummins INSITE |
| Major overhaul | 15,000+ hours | Wet liners replaceable; depends on duty cycle |
Frequently Asked Questions
What is the difference between the QSK19 and QSK23?
Both are electronic inline-six Quantum engines, but the QSK23 has a larger 23-liter displacement (170×170 mm bore and stroke versus 159×159 mm on the QSK19) and reaches higher output — up to 816 kW / 1,020 kVA at 60 Hz versus the QSK19’s ~667 kW / 800 kVA. The QSK23 also uses the HPI PT fuel system, while the QSK19 uses the MCRS common rail system. If you need 750–1,000 kVA from a single inline-six, the QSK23 is the choice.
What genset kVA does the QSK23 produce?
At 50 Hz (1500 RPM), QSK23 ratings span 753–900 kVA prime. At 60 Hz (1800 RPM), they span 838–1,020 kVA. The highest-output model is the QSK23-G7 at 1,020 kVA / 816 kW (60 Hz); the top 50 Hz rating is the QSK23-G3/G9 at 900 kVA / 720 kW.
What does QSK mean in Cummins engines?
The Q denotes the Quantum electronic engine series, S indicates a high-pressure electronic fuel system, and K refers to the K-engine platform. The QSK23 is the 23-liter electronically controlled member of the K-platform family.
Is the QSK23 mechanical or electronic?
It is electronic. The QSK23 uses the Cummins HPI PT electronic fuel system controlled by an off-engine G-Drive Governor Control System (GCS) with a full engine-protection package. This provides precise fuel control, tight speed regulation, and diagnostic capability — unlike the purely mechanical PT pump on KTA-series engines.
Which applications is the QSK23 best suited for?
It is ideal for 750–1,000 kVA generator sets in data centers, hospitals, mining, oil & gas, large commercial standby, and remote prime-power sites. It delivers near-V12 power from a simpler, easier-to-service inline-six block, making it a cost-effective single-engine solution in that kVA band.
What is the lead time for a QSK23 generator engine?
Bare engines typically ship within 15–30 working days. Complete open, silent, or containerized generator sets require 25–45 days depending on alternator brand, controller, enclosure, and destination. We ship worldwide by sea (FOB/CIF/DAP) and can arrange air freight for urgent orders.
Official Resources
Genuine Cummins parts and service information: parts.cummins.com — or browse our full CCEC generator engine lineup.
