On March 30, 2024, Dongfeng officially released the Dongfeng Mach electric hybrid PHREV technology at the Beijing National Tennis Center. This technology integrates all the advantages of pure electric, extended range and plug-in hybrid, which can meet all the expectations of users for new energy vehicles and bring the world's hybrid technology into a "new generation". On the same day, Dongfeng Fengshen L7, the strategic model of Dongfeng Fengshen's new energy transformation and the first model equipped with Dongfeng Mach electric hybrid PHREV, was unveiled at the same time.
Mach electric hybrid PHREV has created a number of China's firsts and the industry's uniques: the industry's first fusion configuration, the industry's highest thermal efficiency hybrid engine, the industry's leading i-Control intelligent electronic control system, and the industry's safest and most durable battery, refreshing China's power to a new height.
The industry's first fusion configuration - the master of the hybrid technology genre
At present, the hybrid technology school is dominated by power shunt and series-parallel connection, both of which have their own advantages and obvious disadvantages. The Mach hybrid PHREV creatively combines the advantages of power shunt and series-parallel connection with a set of solutions, and realizes the integration of a variety of new energy drive modes and advantages with a simple structure, such as extended range, plug-in hybrid, and pure electric.
The world's first configuration, efficient power transmission and control, Mach PHREV can achieve seven hybrid energy management modes: parking power generation, pure electric drive, energy recovery, series drive, multi-gear direct drive, multi-gear parallel, and unique dual-mode power shunt mode. Based on 7 hybrid energy management modes, up to 26 working modes are derived, which can cover the needs of all scenarios from urban to high-speed to polar regions.
The Mach PHREV is versatile, but its structure is simpler than that of its competitors: it uses only one planetary row, two pairs of fixed-shaft gears, and two sets of synchronizers to achieve multi-gear series-parallel connection and dual-mode power splitting.
At the same time, the Mach PHREV is also the world's first hybrid technology to use power split for gear shifting. Power splitting is used to transition between different gears to ensure stable power output during gear shifting, and at the same time, the engine speed can be controlled more smoothly, achieving CVT-like smooth shifting and extreme energy saving.
The industry's highest hybrid thermal efficiency – always leading, never beating
The thermal efficiency of the Mach electric hybrid PHREV hybrid engine reached 45.18%, achieving a breakthrough in the thermal efficiency of hybrid engines, and it is the industry's first and only hybrid engine that has been mass-produced and certified by the China Automotive Research Institute with the highest effective thermal efficiency of more than 45%, which is a veritable industry ceiling.
The industry's best thermal efficiency depends on Dongfeng's technology accumulation: VGT variable geometry turbocharging technology is equivalent to a turbocharger to achieve the optimal effect of multiple turbochargers, with stronger power and lower energy consumption, Dongfeng is the first in the industry to bring this technology into the field of hybrid and achieve mass production application for the first time.
The EGR rate took the lead in breaking through 30%, ranking first in the industry. Increasing 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 EGR rate of 25% 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%, and Dongfeng has broken through the bottleneck, and the EGR rate has taken the lead in breaking through 30%, which is more advanced than the distant lead.
In terms of injection system, high-pressure injection is the foundation, but it is not that the higher the pressure, the more advanced, the injection technology is the key, only fine, accurate, and uniform spraying can really improve the combustion efficiency. At present, the industry still generally adopts three-jet technology, and Dongfeng breaks through the pulse bandwidth and takes the lead in realizing four-jet jets, so that every drop of oil is fully atomized and burned cleanly.
The piston is lightened by 1 gram, which is as tough as the world record for 100 meters has improved by 0.01 seconds. Dongfeng designed the lightest piston of the same displacement engine, weighing only 184 grams, which is 6 grams lower than the industry level.
It is this kind of excellence that has allowed Dongfeng to always be far ahead in terms of thermal efficiency. At present, Dongfeng Reserve Technology has achieved a thermal efficiency of more than 47% and is about to be mass-produced, and is expected to exceed 48% in 2026. In addition, the pre-research of 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. The Mach battery has passed the extreme safety test of the authoritative organization to ensure that the battery does not explode, does not catch fire, and does not 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 frame, which can achieve a durability of 800,000 kilometers.
Military vehicle-level structural protection, when the industry still generally uses the bottom guard plate with a strength of 600 megapascals, the Mach battery adopts a bottom armor with a strength of 1200 megapascals; the honeycomb aluminum alloy frame does not fail under the external force of 300 kN, and exceeds the requirements of the national standard by 3 times; in terms of internal support beams, the industry generally uses aluminum alloy with a thickness of 2.5 mm, and the Mach battery uses a high-strength aluminum alloy with a thickness of 3.5 mm, and the main structure does not deform when dropped from a height of 10 meters, exceeding the requirements of the national standard by 10 times.
In terms of active safety, in addition to the thermoelectric separation structure design, the Mach battery also optimizes the exhaust channel between the cells, increases the spacing between the bottom of the cells, and increases the exhaust volume by 85%.
The industry's first emergency cooling system, in the extreme case of thermal runaway, the sprinkler system above the battery cell can quickly intervene to achieve rapid cooling, with a maximum temperature drop of 80°C in 10 seconds, eliminating the hidden danger of spontaneous combustion.
In addition, the intrinsic safety of the Mach battery cell has been strengthened in four ways: the positive and negative electrode materials optimize the coating process, reducing the heat production and temperature of the battery cells by 6.5°C, reducing the number of short-circuit electrode layers by 50% and improving the heat dissipation by 50% in the current collector, the application of high-safety solid oxide coating makes the shrinkage resistance of the separator up to 500 degrees Celsius, and the high-safety electrolyte system is reduced by 20% The positive electrode side reaction produces heat, which greatly reduces the risk of thermal runaway.
Battery durability is king. In order to avoid battery degradation caused by the passage of time, Dongfeng's self-developed lithium dendrite self-repair technology is the first in the industry to be mass-produced and applied, which greatly alleviates battery attenuation, can improve battery life by 33%, and ensure that the battery is fully charged and discharged for more than 2,000 times, which is much higher than the industry's general level of 1,500 times.
The strongest brain - deep learning makes everyone a "veteran driver"
The Mach hybrid PHREV has the industry's first hybrid configuration hybrid system, a dedicated hybrid engine with the highest thermal efficiency, and a highly safe battery system. The most powerful brain, the i-Control intelligent electronic control system, fully mobilizes and coordinates these things.
Through cross-domain in-depth integration design, i-Control intelligent electronic control "comes out, and controls the whole field". With the support of the advantages of powerful electronic control architecture, Dongfeng has developed an industry-leading AI predictive energy management system, so that the selection of each mode is the optimal solution. This system will automatically match the optimal driving mode for the user according to the real-time road conditions and the user's driving habits.
One ride, one algorithm, the more you drive, the smarter you are. The self-learning scene recognition AI algorithm can automatically implement the optimal control strategy based on the prediction of travel road conditions, EV, REV, PHEV, without manual switching, and automatically improve the energy consumption performance of actual scenarios to achieve "road awareness and energy control".
It is worth mentioning that Dongfeng has introduced a system of deep self-learning of user driving habits and quantification of driving habits in mass production cars three years ago, and now, this system has been able to fully meet everyone's driving habits under the premise of achieving strong power and low energy consumption. i-Control knows the driving habits of each user, so that users can become "old drivers" without practicing driving skills.
"Perceptual" technology - a good system creates new value for users
Good technology not only leads the industry change, but also brings users a visible and perceptible sense of value. Dongfeng Mach electric hybrid PHREV creates a comprehensive experience for users to travel without worry, with no sense of travel cost and worry-free travel mileage.
The most intuitive optimization of technology is to bring users the improvement of car economy. Products equipped with Dongfeng Mach electric hybrid PHREV have a comprehensive travel cost of less than 1 cent per kilometer. With the support of four technologies, including high-efficiency electric drive system, low-friction system, intelligent energy management system and integrated thermal management system, the power utilization rate is as high as 86%, which is the industry's leading, and the power generation efficiency is as high as 3.66 kWh/L, which is the first in the industry. Bring customers a low-carbon travel experience in all scenarios.
Hybrid vehicles are often criticized for "quiet when there is electricity, and rumbling without electricity", and the experience is greatly reduced. Dongfeng uses "black technology" to create an innovative experience for users to operate the engine without feeling in the whole area, and realizes the adaptive noise control of hybrid vehicles in all scenarios through four innovative technology systems, with the interior noise increasing by less than 1 decibel and the body vibration being less than 0.01G when the engine is involved. Even under extreme conditions such as rapid acceleration and overtaking by the feed, the noise increment in 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 "master of the whole", enables technology to empower products and bring users a long battery life, low energy consumption, strong power, high safety, and ultra-comfortable product experience. The Dongfeng Fengshen L7 equipped with the Dongfeng Mach electric hybrid PHREV was also unveiled at the press conference. The new car has the longest pure electric range of 205km and 1500km comprehensive range in its class, and the 000 acceleration is 6s. With such a strong power, it only has a fuel consumption of 3.8L/100km (NEDC) and a combined fuel consumption of 0.56L/100km (WLTC), which is highly energy-efficient.
In the era of new energy and intelligent networking, the global automotive industry pattern is reshaped, Dongfeng Motor continues to accelerate the development of scientific and technological leap, constantly bring more scientific and technological dividends to users, empower users to use cars, bring the world's hybrid technology into the "new generation", and inject the power of central enterprises into the realization of an automobile power.