Why can Dongfeng Citroen reach the national six standards in one step?

From July 20 19 1 day, Henan Province implemented the national sixth emission standard for motor vehicles ahead of schedule. This automobile exhaust emission standard is one of the most stringent emission standards at present. In view of the implementation of the new standards, many car companies have improved the quality of their vehicles in advance. At the same time, the three core indexes of the engine, power torque and fuel consumption, are generally sacrificed to varying degrees. However, for Dongfeng Citroen, it not only reached the National Sixth B in one step, but also achieved the "real National Sixth" standard, and achieved the rare "three liters and one drop" in the industry: power improvement, torque improvement, control improvement and fuel consumption reduction. On July 26th, Dongfeng Citroen's new powertrain communication meeting "From Compliance to Hard Core" was held in Fuda Citroen Store in Zhengzhou, Henan Province, and many local media professionals were invited to participate in it to learn about Citroen's profound strength in meeting the national six emission standards.

Valve lift and valve timing continuously variable system (Valvetronic+DVVT)

Joint development with BMW, advanced technology in the industry. Reduce pumping loss, reduce fuel consumption by about 7%, improve engine operation stability and reduce exhaust emissions. Even and odd valve lifts are different, optimizing airflow and improving combustion.

Electronic wastegate double scroll supercharger

Improve the dynamic response of instantaneous acceleration, which is 5 times faster than the traditional mechanical response; The execution position is accurate and stable, reducing noise; Low speed, high torque: 400THP engine, starting to intervene at 1000 rpm, reaching 280Nm torque output at 1500 rpm, reaching 300Nm torque peak at 1900 rpm and continuing to 4500 rpm.

Electronically controlled clutch driven water pump

Start the water pump as required, and start the cooling cycle; Accelerate warm-up, shorten 2-3 minutes, improve engine efficiency and reduce fuel consumption and emissions; Gao Dai patent design.

Borgwarner chain drive timing system

Anti-tooth jumping protection design of timing system avoids the risk of tooth jumping failure in design; The timing chain is designed with 8-shaped outer chain plate and B-shaped inner chain plate, which has the advantages of reducing weight, reducing friction and improving strength. Life-long maintenance-free and long service life.

New generation oil-gas separation system

Using Mahler oil-gas separation system, the oil-gas separation efficiency is high, increasing by 30%; Increase the crankcase gas dilution pipe to dilute the crankcase atmosphere, reduce the proportion of waste gas in crankcase ventilation gas, improve the oil-gas separation effect and reduce the engine oil emulsification wind; BBY branch (intake manifold side) enters the combustion chamber directly from outside to inside with low load, which reduces the risk of throttle icing.

Aisin 8-speed automatic manual transmission

In addition to the engine upgrade, replacing the brand-new 8AT gearbox is also a highlight. Aisin gearbox is well-known in the industry and is the most mature and stable front 8AT on the market at present. Due to the complex internal structure of the manual-automatic gearbox, its cost is often higher than other types of gearboxes at the same level, and it is mainly used in some luxury brands or high-end models of various OEMs.

The main functions of Aisin 8-speed automatic manual transmission have added many functions on the basis of AT6. The functions of AT6III itself include locking/sliding control, neutral mode, reverse gear protection, fail-safe mode and self-learning control, while ATN8 adds flywheel function, anti-theft function, automatic shift function, direct shift function and integrated shift actuator.

In addition, Aisin 8AT has smoother shifting, more agile shifting response and lower fuel consumption. In general, the power and ultra-low fuel consumption have reached the best balance.

Scientific 8-speed ratio setting, clearer and more intelligent shift logic, bringing a smoother shift experience; A wider transmission ratio range makes the engine work in the best fuel consumption range, advanced gear processing technology (grinding+polishing) improves gear accuracy and reduces torque loss, and ATF oil with lower viscosity greatly improves fuel economy, with fuel efficiency10%; Newly designed TCU control chip and solenoid valve drive unit, upgraded shift logic (can shift gears across gears), realize extremely fast response of gearbox, and optimize shift response time by 50%.