·Shenzhen began to implement car purchase restrictions

The official website of the Shenzhen Municipal Government released today, the "Notice of the Shenzhen Municipal People's Government on the Implementation of the Incremental Regulation and Management of Small Cars", and decided to implement the incremental regulation and management of small cars in the city from 18:00 on December 29, 2014. The amount of quotas is tentatively set at 100,000 per year, depending on road traffic operations, atmospheric environmental protection and the demand for cars.
The Shenzhen Municipal Government stated that in recent years, Shenzhen's motor vehicles have grown rapidly, and traffic congestion and traffic pollution have become increasingly serious. As of December 20, 2014, the number of motor vehicles in our city exceeded 3.14 million. The average annual growth rate in the past five years was about 16%. There were about 500 motor vehicles per kilometer, and the vehicle density was the first in the country.
Among them, in 2013, about 370,000 vehicles were added, with a growth rate of 16.5%; in 2014, about 550,000 vehicles were added, with a growth rate of 20.9%. With the continuous rapid growth of motor vehicles, the length of traffic congestion continues to rise, and traffic congestion areas continue to expand. According to monitoring, the length of the night peak congestion in my downtown area increased from 38 minutes in 2012 to 55 minutes in 2014. Increasing numbers of motor vehicles and increasingly frequent traffic congestion pose a serious pollution to the atmosphere.
According to estimates, motor vehicle exhaust emissions account for 41% of Shenzhen PM2.5 local emission sources, which have formed a major source of atmospheric pollution, which has become an important cause of ash weather. At the same time, the total number of parking spaces in Shenzhen is currently 1.04 million, which is two-thirds of the total compared to the total of 3.14 million. The problem of parking difficulties has become increasingly prominent. The phenomenon of chaotic parking is extremely serious. The public space such as fire exits, carriageways, sidewalks and green belts has been greatly affected, which has greatly affected the smooth roads, traffic order, city appearance and fire safety.
In order to alleviate traffic congestion, improve the quality of the atmospheric environment, and regulate the rational and orderly growth of cars, the Shenzhen Municipal People's Government decided that since 18:00 on December 29, 2014, the control of small cars in the administrative area of ​​Shenzhen will be implemented in increments and indicators.
The Shenzhen Municipal Government stated that the scope of regulation and control of the incremental control of the car is a small and micro passenger car listed in the National Motor Vehicle Type Classification Regulations. The number of increments for small cars in the city is tentatively set at 100,000 per year, depending on road traffic operations, atmospheric environmental protection and the demand for cars. The municipal government will clarify in the recently issued "Interim Provisions on the Management of Incremental Regulation and Control of Small Cars in Shenzhen", and in accordance with the principles of openness, fairness and impartiality, the incremental indicators will be obtained by means of lottery or bidding.
It is understood that this is the eighth city in the country after Beijing, Shanghai, Guangzhou, Guiyang, Shijiazhuang, Tianjin and Hangzhou.

The function of the crank-connecting rod mechanism of Car Engine System is to provide a place for combustion, which changes the expansion pressure of the gas acting on the top of the piston after burning the fuel into the torque of the crankshaft rotation, and continuously outputs power. It is generally composed of three parts: body block, piston connecting rod group and crankshaft flywheel group.

The function of the crank-connecting rod mechanism is to provide a place for combustion, which changes the expansion pressure of the gas acting on the top of the piston after burning the fuel into the torque of the crankshaft rotation, and continuously outputs power. Crank and connecting rod mechanism is the main moving part for the Car Engine to realize the working cycle and complete the energy conversion. In the working stroke, it converts the reciprocating motion of the thermal piston produced by fuel system combustion and the rotation of the crankshaft into mechanical energy and outputs power to the outside world; in other strokes, it relies on the rotating inertia of the crank and the flywheel to drive the piston up and down through the connecting rod, creating conditions for the next work.