In May, the 48V family welcomed a new member-Chevrolet Luze. Cruze has been in the leading position in its class, with youthful appearance, equipped with intelligent car coupling system and good safety and health performance, which has been able to meet the needs of young consumers. After joining the 48V light mixing system, the product performance is more comprehensive, further consolidating its leading edge in the same level.
1.？ Chevrolet Luze launched a 48V light mixing system;
On May/0/0, 2020, 1 1, the light hybrid model of the fashionable sports car Cruze was launched, and the price was 108900 yuan-122900 yuan. The Luze RS series and Redline Shang Hong series are equipped with a brand-new 48V light mixing system, which has better performance in terms of quietness and ride comfort, and realizes the double improvement of power performance and economy.
Chevrolet Cruze light hybrid vehicle is equipped with 1.0T and 1.3T Ecotec twin-injection turbocharged engines, both of which have excellent power performance, quality, reliability and durability, and are independently equipped with a light hybrid system consisting of a 48V motor, a 48V power battery, a power management module and a hybrid control unit.
48V light mixing system can realize braking energy recovery, agile start and stop, electric power assist, electric idling, intelligent charging and other electric functions. , effectively improve the ride comfort when the vehicle is powered off. According to the current official information, the comprehensive fuel consumption of Chevrolet Cruze light-mixed RS version is 5.3L per 100 kilometers, and the comprehensive fuel consumption of the red line version is even lower, only 4.7L, which meets the national six B emission standards.
2. What is a 48V mild hybrid system?
The basic idea of 48V mild hybrid power system is to raise the standard voltage of vehicle equipment to 48V to drive a more powerful vehicle system and realize the optimal integration of vehicle internal systems. As for why the voltage parameter of 48V is selected, because according to the regulations of ECE in Europe, DC voltage below 60V and AC voltage below 30V belong to safe voltage, which will not cause personal danger. The maximum voltage of 48V powertrain system is generally around 54V, which is within the range of safe voltage. If the voltage is too high, stability issues such as high-voltage circuit protection and electromagnetic compatibility need to be considered, and the development cost will increase rapidly on the basis of the traditional 12V, so considering the cost, safety and performance, 48V voltage is a better choice.
At present, the core components of mainstream 48V mixed light system include 48V battery, 48V BSG or ISG motor, DCDC voltage inverter and other corresponding control modules. Traditional fuel vehicles used to use the engine start-stop system to achieve a certain degree of energy saving and emission reduction, and used the principle of stopping the engine for a short time when the vehicle was stationary to save fuel. However, the on-board voltage of 12V is "more than enough" for high-power start-stop motors to a certain extent, which usually leads to the slow vibration and response of the start-stop system when it works frequently, which affects the normal operation of the air conditioning system and greatly affects the user experience.
The 48V light mixing system has a bigger battery and a more powerful motor. The motor controls the engine operation and gearbox shifting, achieving more energy-saving and emission-reduction functions than the general start-stop system and improving the comfort of the vehicle.
3. Advantages of the 48V mild hybrid system carried by Chevrolet Greenfield:
48V mixed light system can improve energy-saving performance and driving quality, especially for small displacement vehicles. The following are the advantages of Chevrolet Luze 48V light mixing system compared with traditional fuel vehicles.
Agile Start: Compared with the traditional start-stop motor of 12V, the 48V motor of Chevrolet Luze can quickly increase the engine speed in a short time at the moment of ignition, so as to ensure that the engine can reduce vibration as much as possible and ensure the comfort of vehicle start. In addition, when the vehicle is ready to start in the start-stop state, the 48V system starts before the engine to realize pure electric start, which makes the vehicle start quieter, faster and smoother and improves the driving quality.
Fast shifting while driving: Chevrolet Luzer's 48V light mixing system allows the motor and engine to fully cooperate. When the gearbox shifts gears every time, the motor can provide extra torque to help the engine reach the target speed as soon as possible by calculating the required shift speed of the engine.
Electric Idling: Many people who drive traditional fuel vehicles struggle to save fuel regardless of whether they have gears or not, but in fact, there is no engine stop to save fuel. However, due to the limitations of traditional fuel vehicles, once the engine is turned off, many equipment on the vehicle will be unusable. Chevrolet Luzer's 48V light mixing system can ensure the normal operation of other driving devices when the engine is stopped through the remaining power in the lithium iron phosphate battery. When the vehicle is idling, the 48V system outputs electric torque to maintain the engine speed, which effectively reduces fuel consumption and solves the energy supply problem in the start-stop mode of the vehicle air conditioning system.
Motor assistance in acceleration stage: Chevrolet Luze is in acceleration state, and the engine and 48V system generate electricity at the same time, which is in a mixed state of oil and electricity. The motor assists about 5-20Nm, which can optimize the engine working point and reduce fuel consumption under the same vehicle power.
Braking energy recovery and intelligent charging: traditional fuel vehicles directly waste the kinetic energy of the vehicle through the heat energy generated by braking, while Chevrolet Roadster equipped with 48V mixed light system can recover energy during the deceleration stage of the vehicle. In addition, when the Chevrolet Luzer engine is running at high speed and low load, the 48V system enters the intelligent charging mode, which efficiently converts the thermal energy of the engine into electrical energy and charges the 48V power battery.
From the advantages summarized above, it can be seen that the biggest advantage of Chevrolet Luzer's 48V light mixing system is to optimize the energy consumption under engine start-stop, start-up, acceleration and braking conditions, so as to keep the engine as efficient as possible, thus achieving the purpose of fuel saving. At present, luxury brands such as brand-new Land Rover Aurora, Mercedes-Benz S-Class and C-Class, Audi A8L/A6L all adopt 48V light mixing technology, and domestic brands such as Geely Job/Yue Bin and changan CS55 also adopt this technology to realize vehicle energy saving and emission reduction.
The author has something to say:
With the development of new energy vehicles, there will be fewer and fewer pure traditional fuel vehicles on the market. Although traditional fuel vehicles will not be completely eliminated in a short time, the automobile electrification revolution will affect traditional fuel vehicles to further consider how to save energy and reduce emissions. Although it is impossible to quickly transform and produce new energy vehicles in one step, it is also a positive progress to use 48V light mixing system on traditional fuel vehicles. The author thinks that the 48V light hybrid system provides a relatively balanced mode of cost and emission for manufacturers, so that the traditional car-making power can be gradually transferred to the production of new energy vehicles, which is actually the greatest significance of the 48V hybrid system.
Text/New Energy Information Analysis Network Song
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.