Advantages of electronic throttle

Wei Chai has dominated the medium and heavy engine industry for many years, so do you know about Wei Chai's light power products? In 2020, the power of light vehicles in Wei Chai will develop rapidly, and the production and sales volume is expected to reach 260,000 vehicles, jumping from the sixth in the industry to the second. In order to deeply reveal the veil of Wei Chai light vehicle power, please follow the old road to tell the reporter about an engine tailored by Chai Wei for the light vehicle market-WP 2.3N.

This engine weighs 230 kg, which is lighter than competing engines with the same displacement 10- 15 kg. The cylinder diameter is 89 mm, the stroke is 92 mm, and the compression ratio reaches 17. 1: 1. The design of high compression ratio makes it possible to output more torque. WP？ The maximum power of 2.3N is 96KW( 130 HP), which is suitable for the standard transportation market of Blu-ray trucks. According to different local laws and regulations, car owners can freely choose national five or national six emissions.

The green box in the above picture is marked as electronic throttle system. A card friend left a message asking: isn't the throttle system the exclusive configuration of gasoline engines? In fact, due to stricter environmental standards, finer intake control can achieve a more scientific air-fuel ratio and make emissions more environmentally friendly. In addition, the throttle has two designs, one is the traditional pull-wire type, and the other is the electronic type marked in the figure. Compared with the traditional cable throttle, the electronic throttle is more reliable, the intake control is more accurate and the fuel efficiency is more efficient.

The yellow box in the above picture is marked as the air inlet heater. Its main function is to preheat the gas in the engine intake cavity in cold weather and cold car. The heating element of the air heater is stainless steel heating fins, and the inner cavity of the heater is provided with a plurality of curved heating fins to quickly heat the surrounding air to achieve the purpose of heating. In this way, hot air enters the cylinder and the engine can be started smoothly.

In the above picture, the red box is marked as the oil filter assembly. The blue screw cover can be opened, and there is disposable filter paper for filtering oil. The advantage of this design is that only disposable filter paper needs to be replaced during maintenance without replacing the traditional filter cup, which reduces the maintenance cost. Below the oil filter, you can see the cuboid oil radiator. Because the supercharged engine has high explosion pressure and high rotational speed, the working temperature is higher than that of naturally aspirated engine. The addition of oil radiator keeps the oil in a reasonable temperature range, ensures the normal operation of the engine and prolongs the service life of the oil.

The red box in the above picture is marked as steering booster pump. The booster pump is designed as a front gear transmission. Booster pumps are generally divided into gear drive and belt drive. Compared with the belt transmission devices used in other engines, the gear transmission is very reliable, and there is no need to worry about the maintenance and replacement of the belt in the later stage. Because the characteristics of freight cars are different from those of passenger cars, the steering system must be reliable and durable. During driving, if the booster pump doesn't work because of belt breakage, the consequences are unimaginable. Therefore, the gear-driven booster pump must be selected as the engine.

The yellow box in the above picture is marked as seat belt pretensioner. The belt of the engine needs to drive the water pump, compressor, motor and other components, so the design of the belt circumference is relatively long. Under long-term use and temperature difference, the transmission belt will become longer, and the tensioner only plays a role in adjusting the tightness.

The green boxes in the above picture are marked as air compressor (left prototype not installed) and generator device (right). When the layout of the engine allows, the electrical software is designed at the upper left and upper right of the engine, which is convenient for later inspection and maintenance.

The red box in the above picture indicates a single-cylinder water-cooled air pump, both of which are geared. The advantages of gear over belt drive are not detailed here. The design of the water-cooled cylinder head ensures that when the air pump really works for a long time, the coolant in the cylinder head will circulate with the coolant in the engine cycle, and there will be no high temperature phenomenon and no damage to the air pump.

The yellow box in the above picture indicates the turbocharger of the engine. The supercharger is designed as a small volute, which has the advantages of fast throttle response and reduced turbine lag.

The green frame in the above picture is marked as the flywheel housing of the engine. The flywheel housing is round, and a closed clutch will be formed after the gearbox is installed, which reduces the transmission of noise.

The above is a simple understanding of the appearance of Wei Chai WP2.3N engine. This engine is compact and highly integrated. We expect it to perform better in the market. Let's wait and see.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.