Design features for the principle of automatic gearboxing
The manual transformer box transfers the engine power to the moving axis by means of a mechanical relay of the friction plate of the clutch, and provides a different speed ratio through a slide gear that binds the different transmission ratios, thus driving the vehicle and achieving the required speed of operation。
The structure of the automatic gearbox is slightly more complex than that of the manual gearbox, but its functionality is significantly improved. The automatic gearbox, which is designed with efficient and reliable liquid transformers/planetary gears, has been tested by heavy loads around the world over the past decades and is still improving。
Rationale
The power of the engine is first transmitted to the liquid twister (torque converter), where the power (torture) is used as the medium by oil, from the pump wheel (pump) to the turbine (turbine) and then to the main axis of the gearbox. When there is a turn-off between the turbines and the pumper, the fluid, through the guidance of the internal structure of the transformer, transfers more energy from the pumper to the turbine, which increases the twister, which is the boost of the liquid transformer. Pumping wheel and turbine twister increase, and that's what the hydraulic twister does. The greater the difference between the speed of the pump and the turbine, the more significant this effect is. As a result, when vehicles start or when vehicle loads are increased, the allison automatic transmission box provides additional twister functions。
In some models of the allison auto-reform box, the liquid transformer can have a lock ligator (lock clutch), i. E., when the turn-off between the pump and the turbine is close to zero, the lock entanglement combines to become a direct mechanical connection to maximize the speed of transmission。
Motivated from the transformer to the planetary gear assembly gearing unit through the main axis, where multiple sets of planetary gears work together, producing different speed ratios to meet the different load and speed requirements of vehicles. Unlike the slide gear structure of the manual transformer, the planetary gearing gears are in a state of permutation. Each set of planetary gears consists of solar wheels (sun gear), planetary wheels (planet gear) and outer rings (ring gear), and if one of them is fixed and the other is rotated, the third can be rotated at different speeds, or at different turns, with different combinations of planetary gears, with multiple different moving ratios and shifts。
There are a series of multiple pieces of centrifuges in the planetary gear gear transformer that separate or combine different planetary gears, creating multiple forward and reverse barriers to d and r。
The control function of the automatic transformer box is a hydraulic control valve that continuously senses changes in engine and vehicle speed, payload, road conditions and uses the corresponding clutches through the hydraulic system. The transformer model and gear block are automatic and instantaneous, and any operational change block is faster than manual driver。
Toque converter
Save maintenance and reconciliation of mechanical clutches
A buffer absorbs engine twists and reduces the impact of the transmission system
Increased twists the performance of the 3-5 block automatic transformer exceeding the 6-10 block manual transformer
You can use different transformers to match different engines and uses
Multiple pieces of clutch
Automatic wear and tear compensation without reconciliation
Close the clutch
Improved engine power for fuel economy and high position
Planetary gear speed facility
Quick do not cut the power switch, no shock, fault and empty fuel consumption
Maintain a large number of constant rodents and equal distribution of the twisting force
Provide uninterrupted power to the driver
Hydraulic control valves
Accurate and timely sensor calculations and block shifts
Prevention of mishandling of drivers
Avoid engine overload or speeding
Electronic control
Electronic control systems for the t, md, hd series can be very sophisticated in controlling the work of speed transformers, electronic sensors of electronic control systems can react to the working state of vehicles or engines in a timely and accurate manner, and control valves of transformers are instructed to conduct appropriate shifts or changes in the working form of liquid transformers to enable vehicles to operate in optimal condition. The electronic control system of the allison auto-tracker has many important advantages:
The change is more precise
An electronic control system can have up to +/- 1 per cent of the output speed, while hydraulic control is only +/- 5 per cent - 10 per cent. This made the gearbox more sensitive to the state of operation of the vehicle, smoother and more rational, and significantly improved its performance。
More flexible application
The electronic control system control unit can install different chips, which are stored with all the transformer logic of the gearbox, so that you can set the chip on the basis of factors such as your vehicle performance, use, etc., and also replace the chip when the vehicle performance or use needs to change, thereby making the gearbox more flexible and wide-ranging。
Improving fuel economy
The electronic control system makes the gearbox more precise and rational, and the flexibility of the control unit makes the gearbox more precise for different applications. Thus, engines can be kept at low levels of the oil curve and fuel economy。
Improving vehicle performance
The gearbox shift area can be programmed in the best condition of the vehicle. For example, vehicle performance could be enhanced by increasing speed by setting the shift area at the high end of the engine curve。
Increasing productivity
The power and efficiency of the electronic control system engine is maximized, with a shift of precise, low-speed locks allowing the engine to be kept out of drag and torque, which can save much recycling and increase transmission efficiency. This resulted in an 8-10 per cent increase in vehicle efficiency。
Lower maintenance costs
The electronic control system has 31 monitoring self-inspection features that enable early warning of operational problems and avoid serious malfunctions and costly maintenance. The results of the self-inspection can be stored, and some troubleshooting can be left to routine warranty. In the event of a major malfunction at work, the system provides emergency response to ensure that the malfunctioning vehicle can return to the maintenance site. In addition, a number of mechanical components requiring regular maintenance were removed from the electrical control system. The electronic control system is more advanced and fully functional in the newest generation of allison world automation box t, md, hd series。
Microcomputer smart control system
A self-learning function that automatically regulates the most appropriate block-replacement pattern, depending on the driver's different driving habits, road conditions, payloads, etc. To make vehicles, engines, and motors more smooth and economical。
Vehicle and engine status sensor module
A vehicle or engine can be provided with a specific operating condition, such as door sensors for buses, operating or operating vehicles with operating equipment, speed sensors, motor turns and oil doors, to improve the use of the vehicle as a whole。
Block logical control
It is possible to prevent gearboxes from flying into the upper or the lower of the barrier when the wheel is sliding or when the card suddenly dies。
Abs compatibility
Connecting the gearbox's locking clutch with the abs brakes to further improve brake performance。
Liquid speed deviators
Allison's hydraulic brakes are powerful。
Allison's hydraulic brakes are in two forms: input and output. Enter the brake between the transformer and the planetary gear, and output the brake in the back of the planet's gear. Both liquid brakes can generate large brake power, almost twice as much as other auxiliary brakes. Liquid brakes can work well in the high and steep slopes of start-up parking。
Output decelerator
The power of the output decelerator works directly on the vehicle's drive axis, independently of the engine's turn or the gearbox's stop. It can be linked to the brakes by hand or by pedals, or it can function automatically upon the closure of the oil door, as required by its use. Allison can also provide a secondary output-reducing device, the first being a hydraulic rotor stationary-reducing device and the second being an oil-cooled friction-reducing device. When the vehicle is at high speed, the hydraulic repulsion device works, and when the vehicle is at low speed, the off-coort repulsion device works。
The advantage of liquid speed retrieval
Reduction of brake wear and maintenance
Avoid overheating brakes
Increased brake lifetime
Increased vehicle control at downhill
Slow down, smoother, safer
Work noise is smaller than other types of brakes
Subdynamic output (pto)
Allison's automatic gearbox provides two sub-powered modes of output, transformer and engine. (providing power-output interfaces only, which are fitted by vehicle production plants
Transformer drive
This form is selected for each model of the allison auto-reformer, whose insulated transformation ratio allows control of the oil door alone to manipulate the sub-dynamic output unit to move, inch or maintain in a smooth motion. The larger the load and the greater the twisting ratio when the split device works in a vacuum, so that when the engine is loaded, it changes very little and automatically adjusts as the load increases. The changes in the load and the shock are absorbed by the transformer's fluid buffer, and the engine can maintain a more stable turn-off to ensure that the fans work properly。
Engine driven
In the ht series, the engine-driven split output is optional, and the split device is directly driven by the engine and works in the stationary or walking state of the vehicle. This means that the split unit is required to work at a low engine or at a constant rate。
