Crankcase

Our Factory
Liubei engine factory, located in jinhua, zhejiang, is a leading global provider of automotive power solutions. Since its establishment, we have been committed to designing, manufacturing, and providing innovative, reliable, and efficient engine products, contributing to the development of the automotive industry

One-stop Solution
Strive to build the best one-stop auto parts service platform in china, make auto parts services easier, go further, achieve customers,and achieve ourselves

Advanced Equipment
Our factory is equipped with the most advanced production equipment and automated production lines:
High precision cnc machine tools and machining centers
Intelligent assembly line and robot system
Advanced detection and testing equipment
Environmentally friendly manufacturing process
The application of these devices and technologies ensures that our products reach industry-leading levels in terms of quality, performance, and reliability

Quality Control
We have implemented a comprehensive quality management system, from raw material inspection to final product testing, and every process undergoes strict quality control. Our engine products comply with international standards and have passed multiple rigorous certifications and tests.

Customized Services
We provide personalized accessory recommendations and customization services to ensure that the accessories you choose perfectly match your vehicle model and usage needs

Dry Crankcase:
A dry crankcase is a type of engine design where the crankshaft and connecting rods operate in an enclosed space that is entirely separate from the engine's lubrication system. In this setup, oil is not present in the crankcase, and lubrication is achieved through oil pumps and channels that deliver oil directly to critical engine components. Dry crankcases are commonly found in many modern automotive engines, offering advantages in oil control and reduced internal friction.

Wet Crankcase:
In contrast to a dry crankcase, a wet crankcase incorporates oil directly into the crankcase housing. The crankshaft, connecting rods, and other moving parts are partially submerged in oil, providing continuous lubrication and cooling. This design is often seen in two-stroke engines, small gasoline engines, and some older automotive engines. While it simplifies lubrication, it can lead to oil contamination and increased internal drag.

Semi-wet Crankcase:
A semi-wet crankcase strikes a balance between the dry and wet designs. In this configuration, the crankshaft and connecting rods partially dip into an oil reservoir, which ensures adequate lubrication without submerging the entire assembly. Semi-wet crankcases are seen in various engines, including some motorcycles and recreational vehicles, offering the benefits of both wet and dry designs.

Closed Crankcase:
A closed crankcase refers to an engine design where the crankcase is sealed and isolated from the environment. This closed system prevents the release of engine emissions into the atmosphere, making it environmentally friendly. Closed crankcases are common in modern, emission-compliant automotive engines, helping reduce pollution and meet stringent environmental standards.

Open Crankcase:
An open crankcase design allows the engine's interior to be in direct contact with the surrounding atmosphere. While this setup simplifies engine construction and cooling, it can result in the release of unburned hydrocarbons and emissions into the air, making it less environmentally friendly. Open crankcases are typically found in older engines and some small equipment engines.

The crankcase stands at the heart of the engine, providing shelter for the entire crank mechanism, including pistons, cylinders, and connecting rods. Additionally, it serves as the anchor point for various accessories, the transmission/gearbox, the engine control system, and the cylinder head, all connected to the crankcase.

A fundamental and consistent role of the crankcase is safeguarding the crankshaft and connecting rods, effectively shielding them from potentially damaging debris. In simpler two-stroke engines, the crankcase undertakes multiple functions, doubling as the pressurisation chamber for the fuel-air mixture.

In more intricate four-stroke engine designs, the crankcase is hermetically separated from the fuel-air mixture by the pistons. Instead, its primary function becomes the storage and circulation of oil, which is crucial for engine lubrication. Additionally, it plays a role in enhancing safety by preventing access to moving parts, albeit to a limited extent.