What does FR mean in PV2R1 23 FR

PV2R1- is the serial number of the Yuken vane pump.

23 is the displacement of the pump, which represents the output of 23ml of hydraulic oil per revolution.

f represents that the connection method of the pump is flange connection.

A more professional vane pump manufacturer in China.

If it's a fiber optic cable, then FR is Fire Resistance Fire Resistance material with a certain fire resistance.

Rear-wheel drive, that is, front-enginerear-drive (FR), is the most traditional type of drive. Most trucks (including pickup trucks), some cars (especially high-end cars) and some buses at home and abroad use this type of drive, but there are very few small cars with this type. Advantages The vehicle with the front-wheel drive type has the following advantages:

1. When starting, accelerating or climbing on a well-assembled road surface, the load of the driving wheel increases (i.e., the adhesion pressure of the driving wheel increases), and its traction performance is superior to that of the front-wheel drive type; 2. The axle load distribution is relatively uniform, so it has good handling stability and driving smoothness, and is conducive to prolonging the service life of the tire; 3. The engine, clutch and transmission assemblies are adjacent to the cab, simplifying the arrangement of the control mechanism; 4. The steering wheel is the driven wheel, and the steering mechanism is simple in structure and easy to maintain. At the same time, the FR type has the following drawbacks: 1

Due to the use of the drive shaft device, it not only increases the weight of the vehicle, but also reduces the transmission efficiency of the power train, which affects the fuel economy; 2.The arrangement of longitudinal engine, transmission and transmission shaft reduces the cab space and affects the ride comfort; At the same time, the reduction of floor height is also limited; 3. When accelerating on snow or slippery roads, the rear wheels push the body, and the tail swing phenomenon is easy to occur. The passenger car with the front and rear drive mode is easy to be modified by the truck, and there are many common parts with the truck.

In addition to the advantages and disadvantages similar to those of front-wheel drive trucks, there are also the following drawbacks: 4Because the hood protrudes above the floor, the area utilization rate in the compartment is reduced, and the noise in the car is large, and the heat insulation and vibration isolation are relatively difficult, which affects the ride comfort; 5.

The front axle is prone to overload, and the axle load distribution is not ideal, which affects the handling stability; 6.Because the front overhang is restricted, the rear overhang is too long, and it is easy to scrape the ground when going uphill. In recent years, with the further development of city buses in the direction of quasi-low floor and ultra-low floor, the drive type of buses has shown a trend of replacing front-wheel drive with rear-mounted rear-wheel drive.