Start-stop system is the highlight of Volkswagen BlueDrive efficiency technology analysis

New energy plans have become an indispensable part of the development strategies of various automobile manufacturers. Whether it is the Japanese hybrid synergy drive, Mercedes-Benz's blue efficiency, or BMW's efficient power system, they are all working towards environmental protection and energy saving. Of course, Volkswagen will not lag behind and use the excellent BlueMotion technology series. With the introduction of the Golf BlueMotion version, more and more BlueMotion models will be introduced into China. Next, let's take a look at what BlueMotion is.

Definition of "Blue Drive" technology

Volkswagen's "BlueMotion Technology Series" is a collection of Volkswagen's energy-saving and environmentally friendly automotive technologies, representing Volkswagen's innovation in energy-saving technologies. Volkswagen's "BlueMotion Technology Series" is based on Volkswagen's powertrain technology (including TSI, TDI and DSG), and further combines more advanced technologies to reduce fuel consumption and emissions, including: start-stop, regenerative braking energy recovery and other energy-saving technologies, new drive technologies such as electric drive and hybrid power, exhaust gas purification and post-treatment technologies such as SCR that can achieve clean emissions, and alternative fuel technologies such as EcoFuel, BiFuel and MultiFuel.

Some of these leading technologies are already mature and have been equipped in mass-produced models; some will soon be able to achieve mass production. The "BlueMotion Technology Series" has been gradually applied to Volkswagen's mass-produced models and has formed a series of "blue" models, including: BlueMotion, BlueTDI, and TSI EcoFuel.

Given that Volkswagen's BlueMotion technologies, BlueTDI and TSI EcoFuel, have not yet been introduced into China, we will focus on introducing technical information related to BlueMotion.

Start-Stop

When the vehicle is stationary, the fuel consumption caused by the engine idling is the most meaningless. Start-Stop technology makes this meaningless waste a thing of the past. Especially in urban traffic with frequent starts and stops, the fuel saving effect brought by Start-Stop technology is more obvious. Its working process is as follows: when encountering a red light, the driver brakes to stop the vehicle completely, shifts the gear to neutral and completely releases the clutch pedal, and the control system automatically turns off the engine.

When the green light comes, the driver steps on the clutch and the engine automatically restarts. The driver can continue to move forward by shifting into gear. The operation of automatic transmission models is even simpler. The driver only needs to apply full brakes to stop the vehicle, and the engine will automatically shut down. After releasing the brakes, the driver steps on the gas and the engine will automatically start. This energy-saving driving method does not change people's daily driving habits and does not cause any trouble to the owner. However, it brings significant energy-saving and emission-reduction effects.

Recuporation (Regenerative braking energy recovery)

The vehicle consumes excess energy during braking or deceleration. Recycling this energy can reduce the vehicle's energy consumption and further improve fuel economy. The goal of Recuporation (regenerative braking energy recovery) technology is to maximize the recycling of excess energy that would otherwise be wasted.

When the driver releases the accelerator pedal or applies the brakes, the vehicle slows down and generates excess energy. The regenerative braking energy recovery system recovers the excess energy and, under the regulation and control of the generator control unit, increases the voltage of the generator to charge the battery system and recovers and stores the excess energy in the form of electrical energy. The system also controls the reduction of the generator voltage when the vehicle is accelerating or driving at a constant speed, or even completely shuts down the generator to reduce the engine load and improve fuel economy. To achieve regenerative braking energy recovery, the software of the energy management system and the engine control system must be specially developed and improved.

Hybrid and Electric Drive

Based on the Touareg SUV, Volkswagen has developed the Touareg V6 TSI Hybrid hybrid SUV model. This model uses a 3.0 V6 TSI supercharged direct injection gasoline engine and an electric motor as the driving system. According to the vehicle's driving conditions, the control system controls the vehicle to drive the engine or the electric motor independently or together. The vehicle starts with the electric motor, and when the speed reaches more than 50km/h, the engine turns to drive the vehicle, effectively reducing emissions and fuel consumption in urban road conditions.

When more power is needed for rapid acceleration or climbing, the engine and the electric motor are driven together to obtain strong power. Its maximum power is 275 kW, the maximum torque is 550 Nm, and it takes only 6.8 seconds to accelerate from a standstill to 100 km/h, with a maximum speed of 240 km/h. At the same time, this model also uses many technologies that help improve fuel economy, such as start-stop, regenerative braking energy recovery, and low-resistance coasting, achieving a low fuel consumption of 9.0 liters per 100 kilometers, carbon dioxide emissions of only 210 grams/kilometer, and can meet the emission standards of Euro 5 and North American ultra-low emission models.

Clean and environmentally friendly alternative fuel technology

EcoFuel is an engine technology that uses compressed natural gas as fuel. Unlike gasoline, natural gas fuel does not have lubricity, and its anti-knock index is higher than that of gasoline, and its combustion pressure peak is high. Therefore, it is necessary to improve or strengthen certain engine components, such as valves, pistons, etc., and use specially developed fuel nozzles. Due to the high anti-knock index of natural gas fuel, it has advantages in fuel economy. At the same time, natural gas is also a clean and environmentally friendly fuel. Compared with the same level of models using gasoline as fuel, various emission indicators are greatly reduced. Volkswagen has already put a number of models using EcoFuel technology on the market.

At the same time, Volkswagen is also actively developing BiFuel (dual-fuel) technology, MulitFuel (multi-fuel) technology, etc. The development of these technologies will open up more resources for vehicle fuel, gradually reduce dependence on oil resources, while reducing emissions and protecting the environment, thereby promoting the sustainable development of the automotive industry.

BlueMotion Model Comes to China Golf BlueMotion Edition becomes the first BlueMotion model to enter China

At the 2009 Shanghai International Auto Show, Volkswagen displayed two "BlueMotion" models - the Golf "BlueMotion" and the Lavida "BlueMotion" concept car. The author believes that the introduction of BlueMotion models to China not only brings advanced energy-saving and environmentally friendly automotive technology to China, but also reflects the company's environmental awareness and the good intentions of catering to the domestic elite's understanding of environmental protection concepts.

Both "Blue Drive" models are equipped with a 1.4 TSI turbocharged direct injection gasoline engine and a 7-speed DSG dual-clutch automatic transmission. At the same time, the wind resistance is further reduced by optimizing the body shape. The tires are also low rolling resistance tires. The fuel consumption is significantly lower than that of the prototype. The comprehensive fuel consumption of the Golf "Blue Drive" model is 5.6 liters/100 kilometers. The comprehensive fuel consumption of the Lavida "Blue Drive" concept car is 5.8 liters/100 kilometers. Both models meet the Euro 4 emission standards.

■ Golf Blue Drive goes into mass production in China FAW-Volkswagen First energy-saving model launched in China

In terms of exterior design, the 2012 BlueDrive Golf has not changed. It inherits the body of the sixth-generation Golf and has a very good visual performance. The manufacturer has not made any changes to the appearance. The overall size of the car remains at 4199mm in length, 1786mm in width, 1479mm in height, and a wheelbase of 2578mm. There are only some changes in individual details, but these changes are unlikely to be noticed.

Subsequent BlueMotion Model Introduction Plan

Blue Drive Edition Magotan

Compared with ordinary models, the FAW-Volkswagen Magotan BlueMotion version adopts a new center grille shape and is equipped with the BlueMotion logo. At the same time, the new car also adopts front bumper spoiler and rear wing designs to further optimize the aerodynamic design.

The official information about the Magotan Blue Drive version has not been announced yet, but according to the power parameters of the overseas PASSAT B7 Blue Drive model, it is equipped with a 1.6-liter TDI engine and an engine start-stop system, which makes the car's fuel consumption per 100 kilometers only 4.7 liters and carbon dioxide emissions are 109g/km.

Passat BlueDrive

In terms of appearance, it is not much different from the current regular Passat. In the spy photos, only the front grille and rear taillights of the vehicle are covered. Moreover, the Passat in the spy photos has no lens and sunroof, nor a front radar probe, and is relatively low-end.

According to reports, the Passat Blue Drive version will be equipped with a 1.4TSI turbocharged engine and a 7-speed DSG transmission, as well as engine start-stop technology. The Passat Blue Drive is also equipped with a brake energy recovery system, a low-drag aerodynamic kit, low-rolling resistance tires and green anti-ultraviolet heat-insulating glass, achieving energy saving and low fuel consumption in all aspects.

Editor's summary : Through our understanding of BlueMotion technology, we found that only the gasoline engine part of BlueMotion technology has been introduced in China, while diesel engines and more novel dual-fuel or alternative fuels have not yet been introduced. However, BlueMotion technology is the sum of Volkswagen's technologies in new energy. It can be seen that its optimization of internal combustion engines and hybrid power and alternative fuels are fully developed. This also indirectly reflects its comprehensive technical strength.