Core engine components

The cylinder block, cylinder head, and connecting rod—the three core components of an engine. We supply these parts for nearly one-quarter of China’s diesel‑powered vehicles, bringing the same level of precision to the new‑energy, marine‑engine, and low‑altitude flight sectors.

22.6% market share in the cylinder block segment · No. 1 among independent suppliers,Cylinder head market share: 23.4% · No. 1 among independent suppliers,IATF 16949,Cummins Tier 1, 20+ years

Product family

Six major product lines

Commercial Vehicle Cylinder Block/Cylinder Head

Commercial Vehicle

We offer cylinder blocks and cylinder heads that cover mainstream platforms such as Cummins, Dongfeng, Renault, and Deutz, spanning the full range from 2.8L light-duty to 15L heavy-duty engines.

ISX,ISZ,DCI11,DDI11/13,X7,M11,C11,Z13/14/15,4H,Ruby

New energy vehicle products

NEV

Hybrid‑specific engine blocks, cylinder heads, and structural components, supplied to leading new‑energy vehicle manufacturers such as BYD and SERES.

BYD472,BYD476,Sailisi,Camshaft housing

High-Horsepower and Marine Engine Products

High-Horsepower

Large-bore, high-horsepower cylinder blocks and cylinder heads: Yuchai’s 105L marine engine block (2.7 meters long), Shangchai’s 16VK 76L, 15MD 27L, and others.

CK581 105L,16VK 76L,15MD 27L

Connecting rod

Connecting Rods

A full range of connecting rods for commercial vehicle engines, featuring expansion‑break technology and precision weight‑based sorting.

F2020,3.8,SD,B6,D7,M15,Z13/14/15N,DDI75/90/13,Mamba

Low-altitude flight (eVTOL) components

eVTOL

Supporting low-altitude economy enterprises such as EHang: lightweight components including motor stators, rigid/foldable propellers, and controller housings and brackets.

Stator,Propeller,Controller housing

Electronic products

Electronics

Engine sensors and aftertreatment electronic control components: exhaust gas temperature, oil pressure and oil temperature, coolant temperature, intake air pressure and temperature, engine speed sensor, urea pump, and others.

EGTS,OPTS,WTS,TMAP,CPS,UQS/UP

Workshop Real Scene

Live shot of the production line

M11 Cylinder Block and Cylinder Head Workshop

Automated machining production line

BYD Cylinder Block and Cylinder Head Workshop

New Energy Special Line

Electronics Workshop

Sensor and Electronic Control Production Line

CPT

Cummins Power Technologies (CPT) — a 50/50 joint venture with Cummins.

In 2011, a joint venture was established with Cummins to produce the 4B/6B/6C/6L/6Z mechanical pump series and the QSB/QSL/QSZ electronically controlled engine and power unit series, covering a power range of 20–512 kWm. These products are widely used in generator sets, construction machinery, and stationary power applications.

The CPT unit, together with the power generation module, forms a containerized power plant solution that serves both the gas turbine and the electrical power sectors.

Quality and Customers

IATF 16949 / Full-system coverage under ISO 14001
Consistently recognized as a “Best Supplier” and “Best Delivery Performer” by Cummins, Yuchai, and Dongfeng.
100% online inspection and full-process traceability for critical processes.

Parts Quotation Request →

Xiangyang Changyuan Donggu Industrial Co., Ltd.
Hongshantou Industrial Park, Xiangzhou District, Xiangyang City, Hubei Province
SSE Main Board: 603950

Sales and Inquiries:sales@cydgsy.com
Gas Turbines and Power Generation:power@cydgsy.com
Phone:0710-3062990
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