KAWO丨technical features of a methanol engine

• Cylinder Head and Block Design:

• Compacted Graphite Iron(CGI)Integral Cylinder Head:CGI offers excellent strength and toughness.The integral cylinder head structure enhances the head's strength,enabling it to better withstand the complex conditions of high temperature and pressure during engine operation.This reduces the risk of head deformation and damage,thereby improving the engine's reliability and service life.

• Four-Valve,Single Overhead Camshaft(SOHC):The four-valve design increases the intake and exhaust flow area,allowing for more efficient intake and smoother exhaust,which in turn improves the engine's intake efficiency and power performance.The SOHC structure is relatively simple,effectively controlling the engine's size and weight while ensuring precise valve control,which is beneficial for enhancing the engine's performance and fuel economy.

• Rear Gearbox Placement:The rear placement of the gearbox optimizes the internal layout of the engine,making the engine more compact.It also helps to reduce engine noise.Since gearboxes typically generate some noise,placing it at the rear can minimize noise interference with areas such as the cabin,improving the engine's NVH(Noise,Vibration,and Harshness)performance.

• Deep Skirt,Hollow Chamber,Symmetrical Cylinder Block:The deep skirt increases the block's rigidity,enhancing the engine's structural strength.The hollow chamber design helps to reduce the weight of the block while also improving its cooling performance to some extent.The symmetrical cylinder block ensures more even force distribution,further increasing the block's strength and reliability.This enables the block to better withstand the various forces and torques generated during engine operation,reducing the risk of block deformation and damage.

• Cylinder Head Cooling Structure:The double water jacket cooling structure provides better cooling,effectively controlling the temperature of the cylinder head and preventing it from deforming or being damaged due to high temperatures.The reinforced cylinder head at the combustion surface further improves the head's reliability,allowing it to better withstand the high temperature and pressure generated during engine combustion and ensuring stable engine operation under various conditions.

• Wet Liner Design:The wet liner,which is in direct contact with the coolant,offers good cooling performance by promptly dissipating the heat generated by the liner,maintaining the engine's normal operating temperature.The top-mounted arrangement facilitates liner installation and maintenance and also better integrates with the engine's cooling system.The use of diamond coating material reduces the liner's friction coefficient,decreasing the friction loss between the piston and the liner,improving the engine's efficiency.It also enhances the liner's wear resistance and reliability,extending its service life.

Key Component Design Advantages

• Forged Connecting Rods:The forged connecting rods,produced by the forging process,are free of machining stress and can improve the deformation of the big end hole of the connecting rod.During engine operation,connecting rods are subjected to significant alternating stress.Stress-free connecting rods can better adapt to this complex stress environment,reducing the risk of fatigue failure.At the same time,these connecting rods can meet the requirements of high combustion pressure in the engine,thereby increasing the engine's power and torque output and further enhancing the engine's reliability and performance.

Electronic Control System Advantages

The independently developed DMCC3.0 electronic control methanol system is an important technological highlight of this engine:

• Higher Power Output:The electronic control system can precisely control the injection volume and timing of methanol fuel,enabling the engine to always operate in the best state,thereby increasing the engine's power output and providing the vehicle with stronger acceleration and hill-climbing capabilities.

• Lower Exhaust Temperature:By optimizing control strategies,this electronic control system can effectively reduce the engine's exhaust temperature.Lower exhaust temperature helps to reduce the engine's thermal load,improve the engine's thermal efficiency,and also reduces the burden on the exhaust after-treatment system,enhancing the reliability and durability of the entire engine system.

• Higher Emission Standards:Advanced electronic control technology can precisely control the combustion process,enabling methanol fuel to burn more completely and reducing the emission of harmful gases,such as carbon monoxide(CO),hydrocarbons(HC),and nitrogen oxides(NOx).This allows the engine to meet stricter emission standards,which is beneficial for environmental protection.

• Higher Altitude Adaptability:In high-altitude areas,the thin air reduces the engine's intake volume,leading to reduced power and incomplete combustion.The DMCC3.0 electronic control methanol system can automatically adjust fuel injection volume and ignition timing parameters according to the environmental conditions of high-altitude areas,optimizing the combustion process and improving the engine's power performance and fuel economy in high-altitude regions.This enables the engine to better adapt to complex conditions such as high altitudes.