Advantages of electric Pressure Cooker: first, safety is very important, because it feels unsafe and dangerous for pressure vessels, but the safety of electric pressure cooker is quite high. At present, most Electric Pressure Cookers on the market adopt the floating sealing structure of separating the inner pot from the pot cover. When the pressure is too high, such as overpressure, it can automatically relieve the pressure, which is the most critical. Moreover, in terms of control, pressure control, temperature control and other control technologies are adopted, which can automatically realize the control range of pressure and ensure safety. 2. It has the function of fast and automatic cooking. Because the electric pressure cooker can automatically realize the cooking procedure according to different food and different time, it does not need to be supervised, which reduces people's labor burden. 3. Energy saving because the electric pressure cooker is controlled by time and has pressure, its energy consumption is less and its efficiency is higher than other pots. It is a real energy-saving product. In addition, the electric pressure cooker has many selling points, such as fresh-keeping function, nutritional preservation function, boiling traditional Chinese medicine function and so on. Because the electric pressure cooker is in a sealed state with a certain pressure in the working process, the things are basically isolated from the external air, which avoids the oxidation of food with oxygen in the air during cooking and destroys the nutrition of food. It has the characteristics of short cooking time and no gas, and also avoids damaging various vitamins and amino acids in food. It has the function of fast and automatic cooking. Electric pressure cooker is an upgraded product of traditional pressure cooker and Electric Rice Cooker. It combines the advantages of pressure cooker and electric rice cooker, adopts new technologies and structures such as elastic pressure control, dynamic sealing, external rotating cover and displacement adjustable electric switch, fully sealed cooking and continuously adjustable pressure, and completely solves the safety problems of pressure cooker, Remove the safety hidden danger of ordinary pressure cooker that has plagued consumers for many years; Its thermal efficiency is more than 80%, saving time and electricity (more than 30% electricity saving than ordinary electric rice
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Change the transmission ratio, expand the range of torque and speed of the drive wheel to adapt to changing driving conditions, and at the same time make the engine work under favorable (higher power and lower fuel consumption) conditions;
In the case of the same direction of rotation of the engine, the car can drive backwards;
Utilizing neutral, the power transmission is interrupted so that the engine can be started, idling, and transmission shifting or power output can be facilitated.
The transmission is composed of a variable speed transmission mechanism and an operating mechanism. When required, a power output device can also be added. There are two ways to classify: according to the change of transmission ratio and the difference in the way of operation.
According to the change of transmission ratio:
Progressive transmission is currently the most widely used one. It uses a gear drive and has several fixed gear ratios. According to the different types of wheels used, there are two types of fixed-axis transmission (ordinary transmission) and axis-rotary transmission (planetary transmission). At present, the transmission ratio of a sedan and light and medium truck transmissions usually has 3-5 forward gears and one reverse gear, and there are more gears in a combined transmission for heavy goods vehicles. The so-called transmission gear refers to the number of forward gears.
The transmission ratio of a stepless transmission can be changed in infinitely many levels within a certain range of values. There are two types of power transmission: the electric type and the hydraulic type (dynamic type). The variable-speed transmission component of the electric continuously variable transmission is a DC-series motor, which is widely used in the transmission system of a super-heavy dump truck in addition to its application on trolley buses. The driving part of the hydrostatic continuously variable transmission is a hydraulic torque converter.
An integrated transmission refers to a hydromechanical transmission consisting of a hydraulic torque converter and a gear-type stepped transmission. Its transmission ratio can be varied steplessly within a few intermittent ranges between the maximum and minimum values. More applications.
According to the operating mode to divide:
Manoeuvrable transmissions are geared directly by the driver to shift gears.
Automatic transmission transmission ratio selection and shifting are performed automatically. The so-called “automatic†means that the shift of each gear of the mechanical transmission is to control the actuator of the shifting system by means of a signal system reflecting the engine load and the vehicle speed. Realized. The driver simply manipulates the accelerator pedal to control the speed.
There are two types of semi-automatic manual transmission: one is commonly used several gears automatically operated, the rest of the gear is operated by the driver; the other is pre-selected, that is, the driver selects the gear in advance with the button, in the tread When the lower clutch pedal or the accelerator pedal is released, an electromagnetic device or hydraulic device is turned on for shifting. 
Basic knowledge of automobile transmission
The automobile transmission has several functions: