What Is A Hybrid Car
What Is A Hybrid Car
There are various disadvantages in the fuel engine vehicles that are commonly used at present. Statistics show that under the road conditions that account for more than 80%, an ordinary car only uses 40% of the power potential, and it will drop to 25% in urban areas. It is the emission of waste gas that pollutes the environment. Since the 1990s, countries all over the world have become increasingly vocal about improving environmental protection, and various electric vehicles have come to the fore. Although it is generally believed that the future is dominated by electric vehicles, battery technology issues have hindered the application of electric vehicles. Since the energy density of batteries is hundreds of times lower than that of gasoline, which is far from the value required by people, experts estimate that electric vehicles will not be able to replace fuel engine vehicles within 10 years (unless there is a major breakthrough in fuel cell technology).
Reality forced engineers to come up with a best-of-both-worlds approach and developed a hybrid (Hybrid-ElectricVehicle, abbreviated as HEV) car. The so-called hybrid power unit is to combine the electric motor and the auxiliary power unit as the driving force on a car. The auxiliary power unit is actually a small fuel engine or a power generator set. To put it more vividly, it is to make the traditional engine as small as possible, so that part of the power is borne by the battery-motor system. This kind of hybrid device has not only brought into play the advantages of long continuous working time and good dynamic performance of the engine, but also can play the advantages of no pollution and low noise of the electric motor.
In 2010, the world entered the era of hybrid vehicles. According to the connection mode of hybrid drive, hybrid vehicles are generally divided into three categories:
①Series hybrid electric vehicle (SHEV) is mainly composed of three powertrains including engine, generator and drive motor in series to form the power system of HEV.
②The engine and drive motor of a parallel hybrid electric vehicle (PHEV) are both powertrains, and the power of the two powertrains can be superimposed on each other and output separately.
③ Hybrid hybrid electric vehicle (PSHEV) is an electric vehicle composed of a combination of series and parallel structures, and is mainly composed of three major powertrains: engine, motor-generator and drive motor.
Advantages of Hybrid Vehicles
①Compared with traditional cars, the fuel consumption is very low because the internal combustion engine always works in the best condition.
②The internal combustion engine mainly works near the optimum operating point, with sufficient combustion and clean exhaust gas; no idle speed at start (idle stop).
③ No external charging system is required, and the problems of driving range and infrastructure after one charge are solved.
④ The miniaturization of the battery pack makes the cost and weight lower than that of electric vehicles.
⑤ The power of the engine and the motor can be complementary; at low speeds, it can be driven by the motor.
Under the current technical level and application conditions, the hybrid electric vehicle is the most industrialized and marketable model among the electric vehicles. A hybrid vehicle uses an internal combustion engine and an electric motor as a hybrid power source. It not only has the advantages of good fuel engine power, quick response and long working time, but also has the benefits of no pollution and low noise from the electric motor, achieving the best match between the engine and the electric motor. .