Bringing hybrid technology into a 'new generation' Interpretation of Dongfeng Mach electric hybrid PHREV

On March 30, Dongfeng officially released Dongfeng Mach electric hybrid PHREV technology at the National Tennis Center in Beijing. This technology combines all the advantages of pure electric, extended range, and plug-in hybrid vehicles, and can meet all users' expectations for new energy vehicles and bring the world's hybrid technology into a "new generation." On that day, Dongfeng Fengshen L7, a strategic model for Dongfeng Fengshen's new energy transformation and the first model equipped with Dongfeng Mach electric hybrid PHREV, was unveiled simultaneously.

Mach electric hybrid PHREV has created many firsts in China and unique ones in the industry: the industry’s first fusion configuration, the industry’s highest thermal efficiency hybrid dedicated engine, and the industry’s leading i- The four core advantages of Control intelligent electronic control system and the safest and most durable battery in the industry have set a new level of Chinese power.

The industry's first fusion configuration - the master of hybrid technology schools

At present, the hybrid technology schools are mainly power splitting and series-parallel connection. Both have their own strengths and are both The shortcomings are obvious. Mach electric hybrid PHREV creatively combines the advantages of power shunting and series-parallel connection into one solution. With a simple structure, it realizes the integration and integration of multiple new energy drive modes and advantages. It can extend the range, plug-in hybrid, Can be purely electric.

The world's first configuration and efficient power transmission and control allow Mach electric hybrid PHREV to realize 7 major hybrid energy management modes: parking power generation and pure electric drive , energy recovery, series drive, multi-speed direct drive, multi-speed parallel connection, and unique dual-mode power split mode. Based on the 7 major hybrid energy management modes, up to 26 working modes are derived, which can cover the use needs of all scenarios from cities to highways to polar regions.

Mach electric hybrid PHREV has rich functions, but its structure is simpler than competing products: it only uses one planetary row, two pairs of fixed-axis gears, and two sets of synchronizers to achieve multi-speed series and parallel connection and dual-mode power Diversion.

At the same time, Mach electric hybrid PHREV is also the world's first hybrid technology that uses power splitting for gear shifting. Power splitting is used to transition between different gears, allowing stable power output during the shifting process; at the same time, the engine speed can be controlled more smoothly, achieving CVT-like silky smooth shifting and ultimate energy saving.

The highest hybrid thermal efficiency in the industry - always leading, never surpassed

The thermal efficiency of the Mach electric hybrid PHREV hybrid engine reached 45.18%, achieving a breakthrough in thermal efficiency of hybrid engines. It is The industry's first and only hybrid-specific engine that has been mass-produced and certified by China Automotive Research Institute with a maximum effective thermal efficiency of more than 45% is a veritable industry ceiling.

The industry-leading thermal efficiency relies on Dongfeng’s bit by bit technology accumulation: VGT variable section turbocharging technology is equivalent to a turbocharger. To achieve the optimal effect of multiple turbochargers, the power is more powerful and the energy consumption is lower. Dongfeng is the first in the industry to bring this technology into the hybrid field and realize mass production application for the first time.

The EGR rate was the first to exceed 30%, ranking first in the industry. Improving the exhaust gas recirculation rate is the key to improving the thermal efficiency of hybrid engines, which can significantly reduce fuel consumption. Breaking through the 25% EGR rate is a current industry problem and is considered a technical watershed for this indicator. At present, the EGR rate of domestic and foreign automobile manufacturers is basically around 25%. Dongfeng breaks through the bottleneck and takes the lead in breaking through the 30% EGR rate, which is far ahead.

In terms of injection system, high-pressure injection is the foundation, but the higher the pressure, the more advanced it is. Injection technology is the key. Only fine, accurate and even injection can truly improve combustion efficiency. The industry currently still generally uses three-injection technology. Dongfeng broke through the pulse bandwidth and took the lead in realizing four-injection, allowing every drop of oil to be fully atomized and burned cleanly.

The piston is reduced by 1 gram, which is as difficult as the world record of 100 meters being improved by 0.01 seconds. Dongfeng has designed the lightest piston for engines of the same displacement, weighing only 184 grams, which is a full 6 grams lower than the industry level.

It is this kind of excellence that allows Dongfeng to always remain far ahead in terms of thermal efficiency. At present, Dongfeng's reserve technology has achieved a thermal efficiency exceeding 47% and is about to be mass-produced. It is expected to exceed 48% in 2026. In addition, pre-research on new technologies with thermal efficiency exceeding 50% has also begun.

The safest and most durable battery in the industry - the strongest armor far exceeds the national standard

For Dongfeng, battery safety is the bottom line of new energy. Mach batteries have passed extreme safety tests by authoritative organizations to ensure that the batteries will not explode, catch fire or leak.

In terms of structural safety, through multi-dimensional support structure and multi-dimensional structural safety design, Mach Battery has built a super-high-strength battery framework that can achieve 800,000 kilometers of durability.

Military vehicle-grade structural protection. When the industry still generally uses bottom guards with a strength of 600 MPa, the Mach battery uses a bottom armor with a strength of 1,200 MPa; a honeycomb aluminum alloy frame, which is extruded by an external force of 300 kN , the structural strength does not fail, exceeding 3 times the national standard requirements; for internal support beams, the industry generally uses 2.5 mm thick aluminum alloy, and the Mach battery uses 3.5 mm thick high-strength aluminum alloy, and the main structure will not deform when dropped from a height of 10 meters. , exceeding 10 times the national standard requirements.

In terms of active safety, in addition to adopting a thermoelectric separation structure design, Mach Battery also optimizes the design of the exhaust channels between battery cells. The distance between the bottom of the battery cells is increased, and the exhaust volume is increased by 85%.

The industry's first emergency cooling system. In the extreme case of thermal runaway, the sprinkler system above the battery core can quickly intervene to achieve rapid cooling, with a maximum temperature drop of 80°C in 10 seconds, eliminating the risk of spontaneous combustion.

In addition, the Mach battery cells have been strengthened in four ways in terms of intrinsic safety: the positive and negative electrode materials have optimized the coating process, reducing the heat production of the battery cells by 20% when working, and the temperature lowered by 6.5°C; the number of short-circuit pole pieces on the current collector was reduced by 50%, improving heat dissipation by 50%; the application of high-security solid oxide coating makes the separator's shrinkage resistance as high as 500°C; at the same time, high The safe electrolyte system reduces the heat generated by positive electrode side reactions by 20%, greatly reducing the risk of thermal runaway.

The long-lasting battery is the key. In order to avoid battery degradation caused by the passage of time, Dongfeng's self-developed lithium dendrite self-healing technology is the first in the industry to be mass-produced and applied, which greatly alleviates battery degradation and can increase battery life by 33%, ensuring that the battery's full charge-discharge cycle life is greater than 2,000 times, far higher than the industry’s common level of 1,500 times.

The most powerful brain - deep learning makes everyone a "veteran driver"

Mach electric hybrid PHREV has the industry's first fusion configuration hybrid system, which is dedicated to hybrids with the highest thermal efficiency engine, as well as a high-security battery system. The most powerful brain - i-Control intelligent electronic control system fully mobilizes and coordinates these.

Through cross-domain deep integration design, i-Control smart electronic control "appears and controls the entire venue." With the advantage of its powerful electronic control architecture, Dongfeng has developed an industry-leading AI predictive energy management system, making each mode choice the optimal solution. This system will automatically match the optimal driving mode for the user based on real-time road conditions and the user's driving habits.

One process, one algorithm, the more you open, the smarter you get. Using self-learning scene recognition AI algorithm, it can automatically implement the optimal control strategy based on travel traffic prediction, EV, REV, PHEV without manual switching, automatically improve the energy consumption performance of actual scenarios, and achieve "road awareness and energy control".

It is worth mentioning that Dongfeng has introduced a system for deep self-learning and quantification of user driving habits into mass-produced vehicles three years ago. Now, this system can fully satisfy everyone. Under the premise of adapting to driving habits, strong power and low energy consumption are achieved. i-Control intelligent electronic control knows each user's driving habits, allowing users to become "experienced drivers" without practicing driving skills.

"Perceivable" technology - good systems create new value for users

Good technology not only leads industry changes, but also brings visible and perceptible value to users. Dongfeng Mach electric hybrid PHREV creates a comprehensive experience for users to travel in all scenarios without worrying about travel costs and mileage.

The most intuitive optimization of technology is to improve the economical use of cars for users. Products equipped with Dongfeng Mach electric hybrid PHREV have a comprehensive travel cost of less than 1 cent per kilometer. The integrated design of the multi-energy body from the charging gun, refueling gun to the wheels, with the support of four major technologies: efficient electric drive system, low friction system, smart energy management system, and integrated thermal management system, the electric energy utilization rate is as high as 86%, which is the best in the industry Leading; the authoritatively certified power generation efficiency is as high as 3.66 degrees/liter, ranking first in the industry. Provide customers with a full-scenario low-carbon travel experience.

Hybrid vehicles are often criticized for being "quiet with power, but rumbling without power", which greatly reduces the sense of experience. Dongfeng uses "black technology" to create an innovative experience for users with a senseless operation of the engine in all areas. Through four major innovative technology systems, it achieves full-scenario adaptive noise control for hybrid vehicles. When the engine is involved, the noise in the car increases by less than 1 decibel, and the body vibration Less than 0.01G. Even under extreme working conditions such as rapid acceleration and overtaking, the noise increment into the car can be controlled within 3 decibels, which is far lower than the level of about 8 decibels in the same class, creating a quiet experience for users in all scenarios.

Dongfeng Mach electric hybrid PHREV, as a "masterpiece", enables technology to empower products and bring users a product experience of long battery life, low energy consumption, strong power, high safety and ultra-comfortable product experience. Dongfeng Fengshen L7 equipped with Dongfeng Mach electric hybrid PHREV was also unveiled at the conference. The new car has the longest pure electric range of 205km and a comprehensive range of 1,500km in its class, and can accelerate from 0 to 0 to 6 seconds in 6 seconds. With such strong power, it only has a fed fuel consumption (NEDC) of 3.8L/100km and a combined fuel consumption of 0.56L/100km (WLTC), which is highly efficient and energy-saving.

In the era of new energy and intelligent connectivity, the global automobile industry pattern is reshaped. Dongfeng Motor continues to accelerate technological leaps and innovative development, and continues to bring more technological dividends to users. Empower users to live in cars, bring the world's hybrid technology into a "new generation", and inject the power of central enterprises into realizing a powerful automobile nation.

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