Many of the customers on the market who are ready to choose a hybrid car are vulnerable to misleading the ecvts on the list of model parameters。
The first time you saw a name, you thought it was just an electric version of the normal cvt gearbox。
Many of the introduction vehicles are sold in a simple sentence that carries the ecvt ungraded gearbox, with little willingness to explain the internal structure in depth。
After a large number of car owners took up cars, it remained unclear for several years: why the oil consumption in the city of toyota was also mixed and could be significantly lower than that of many of the same-grade fuel vehicles。
A key conclusion can be drawn by engaging in many years of auto content creation and reaching out to a large number of toyota motorists and auto mechanics:
The ecvt, by its nature, is not part of the traditional gearbox and is precisely called the power distribution agency. Toyota's ability to achieve low oil consumption is precisely the core hardware base of the ecvt system made up of planetary gear + double power。
I. Introduction of pain points: the name is a huge misunderstanding, and two sets of moving structures are nothing like one
It's a common area of perception and error。
The normal cvt on board the fuel truck, which relies on the mass cone and the belt friction power. Ungraded speed is achieved by changing the belt to adjust the drive ratio in diameter。
The maximum slab of the structure is the energy loss of friction and transfer, the long run of heavy loads, and the risk of wear and skimming of steel belts。
Although toyota ecvt has a cvt name, there are no steel bands, cones, and pieces of a clutch。
Only a group of planetary gears, mg1 generators and mg2 motors are available for the core parts。
The two are simply similar to the effect of being able to achieve an insulated rate of change, and the bottom transfer logic and energy transfer paths are completely different and cannot be compared at the same dimension。
Many of our fellow drivers wonder: how can a simple set of gears with electric power sets effectively reduce fuel consumption
The largest waste of fuel in conventional fuel trucks is due to the inflexibility of engine conditions。
When vehicles are in a low-speed jam and creeping position, engines are forced to remain in low-rotation, low-heat-efficiency zones, fuel combustion is inadequate and large amounts of energy are wasted。
The ecvt was designed to break the rigid tie between the engine and the wheel speed, to keep the engine as stable as possible in an efficient operating zone, to use excess power for power generation, and to use electric power-driven vehicles directly at low speed。
Ii. Corrected errors, taking into account the four most widely spread misconceptions about ecvt
Zone one: ecvt is an electric cvt, routine maintenance, driving requirements and normal cvt
This is the most widespread area of error。
Ordinary cvts are the most afraid of violent driving and long climbs to prevent the steel belt from overheating。
The ecvt relies on rigid rods of gear, there is no wear or tear of steel belts and there is greater mechanical tolerance. However, integrated systems for high voltage generators need to focus on electric cooling circuits, with a completely different focus on maintenance。
Erect 2: ecvt structure is simple, no malfunctions, long-term neglect of maintenance
The planetary gear group is indeed durable, operating 4. 5 million kilometres of dual-cars on the market and the gear remains intact。
However, the entire system contains electrical appliances, reversers and electrical control units. The transformer tank oils also bear the function of gear lubrication and electric heat dispersion。
Long-term non-replacement of fluids, fluid deterioration and impurities accumulation can affect dissipation and increase the probability of electrical failure。
Mistake three: accelerator engine continues high turn speeds
There were a number of feedbacks from the owners, and when the floor oils were overboard, the engine was pushed up directly and kept up for a long time, and the speed of the vehicle was flat and it sounded loud。
This phenomenon is not a lack of motivation and is inherent in this body of power allocation。
The system gives priority to ensuring that engines are in an efficient zone, relying on electric aids to supplement the twister, without the logic of the traditional gearbox detachment, and with a clear difference between the sense of hearing and the at, dct model。
Mistake 4: as long as it's a hybrid car, it's the same as toyota's ecvt structure
At present, the mixing route is organized into clusters of programmes。
Toyota ths relies on planetary gears for power diversion, which is part of a hybrid structure; many autonomous brand increments are in a serial mode and do not have a mechanical direct path。
Different structures have advantages and disadvantages, and there is no absolute good or bad, except that technical thinking is different and cannot be generalized。
General analysis of how ecvt can save oil and devolve power distribution logic
First, the division of core parts is described in popular language:
The planetary frame connects engines; the solar wheel connects the mg1 generator; the tooth ring connects the mg2 motor and the wheel。
The complete set is equivalent to an energy transit station, powered by engine output, capable of breaking down two lines in real time。
Work 1: start, low-speed congestion in the city
The vehicles are moving at low speed and the engines are operating inefficiently。
The system can choose to shut down the engine, power the battery to the mg2 generator and drive the wheel alone。
This phase of the vehicle is equivalent to a pure electric vehicle, an engine that does not consume fuel, and a perfect response to early and late peaks of parking and parking, which is also the most prominent scenario in urban areas。
Work 2: short- and medium-speed travel
Engines are activated and power is diverted into planetary gear groups。
A part of the power is transmitted directly to the wheel, mechanically driven vehicles, through the gears
Another element of power drives the mg1 generators to generate electricity, which is stored in batteries or directly supplied to the power drive。
The entire computer is continuously dynamically adjusted to keep the engine as steady as possible and avoid increased fuel consumption due to frequent up and down。
Project 3: high-speed stabilization cruise
Following an increase in speed, the wheel speeds increased and the planetary gears entered a near-directed state。
The engine power is driven more directly by mechanical paths, reducing conversion losses resulting from “mechanical energy conversion to mechanical conversion” and balancing high-speed fuel consumption。
Work 4: pine doors, brakes slowing down
Wheel-driven reverse rotation of the mg2 power machine, which is converted to a generator, converts the kinetic energy recovery of vehicles into electrical storage batteries。
The energy of conventional fuel tankers is reduced to heat by brakes, mixed with energy recovery to recover part of the energy and gradually widens the fuel gap。
The whole workflow can be summarized as follows:
Use electricity as low as possible, flat speed to stabilize engine efficiency, slow to recover excess kinetic energy。
It is the ecvt planet's gear power distribution structure that allows flexibility in completing this energy schedule。
Iv. Practical training training programme, guidelines for the car and maintenance of the panel holdard
1. Daily driving methods
There is no need to be careful about driving, normal commuting and high-speed speeding。
There is no need to climb the slopes like a regular cvt and accelerate it in a short time
It is not recommended, however, that long periods of heavy floor oil be sustained, that the temperature of the electric machine rises in high loads and that the system triggers power limits。
Fuel replacement standards for transformer tanks
In compliance with the requirements of the vehicle maintenance manual, the vast majority of toyota twin peaks recommend the replacement of ecvt fuel with 80,000 to 100,000 kilometres。
Cvt transformer oil cannot be replaced with normal cvt oil, and the different specifications of the oil can affect the dissipation of electric heat and gear lubrication. Priority is given to the original plant specifications。
Focus on cooling systems
The ecvt is equipped with a stand-alone cooling circuit, which, during its daily maintenance, allows the repairer to inspect the liquid level of the cooling fluid and whether the pipes are leaking。
The dissipation of electrical heat is the more common cause of failure in the mix system。
4. Cars for winter temperatures
The reduced activity of cold environment batteries will allow the system to increase the frequency of engine start-up as appropriate。
The start-up phase of the cold car does not require the pursuit of extreme savings, and normal and smooth driving is sufficient, pending a gradual increase in the temperature of the vehicle as a whole。
V. Focus on pit avoidance as a reminder that the selection and use of vehicles requires a rational view of strengths and weaknesses
First, an objective view of oil-saving advantages should not be exaggerated indefinitely。
The ecvt structure is able to optimize the consumption of road congestion in urban areas; if the high-speed and long-distance patterns prevail over the years, the oil consumption gap will be significantly reduced by mixing the best fuel vehicles。
Ultimately, fuel consumption is also affected by road conditions, loads, driving habits and the use of air conditioning, and there is no absolute fuel-efficient vehicle type。
Second, there is a distinction between the durability of mechanical structures and maintenance costs。
The mechanical parts of planetary gears have a low failure rate, but maintenance costs are high in the event of failure of electrical power and reversers。
At the same time, there are special features to mixing high-pressure systems, and it is recommended that priority be given to inspecting the official brand service centres and not to selecting small repair plants with no experience of mixing maintenance。
Thirdly, cars should not be purchased with a single superstition, combining their own scenarios。
If the vast majority of the daily journeys are short-distance and peri-urban fast roads, there is little congestion in the car environment, and there is no need to choose a hybrid version simply for the sake of saving the city's oil。
Fourth, when comparing models on the internet, the difference between ecvt and regular cvt is distinguished。
A number of drivers have promoted the concept of obfuscation, packaging common fuel cvt into hybrid equivalent technology, carefully checking the overall power parameters when selecting vehicles and avoiding being misled by propaganda。
Vi. Summary of the upgrading
In short, toyota's commingling is able to maintain a market foothold over the long term, and the ecvt planet's gear power distribution agency is the core base。
It exits the conventional gearbox to change speed, and instead moves its energy through electrics, gears and co-mobilization to address low-speed oil stress points in fuel trucks。
At the same time, the long-term reliability of the gear-carrying structure, which has been validated for decades by a large number of vehicles, has been reaping good long-term reliability。
There are trade-offs in any technology option, and ecvts tend to be economically smooth and lack a sense of manipulative quality in heavy driving。
We know the logic of technology, not by bragging blindly or simply denying it, but by choosing the car rationally, taking into account our own commuting conditions and budgetary needs。
The bottom logic of vehicle hardware can be understood in order to avoid the commercial propaganda trap and to select a vehicle that is truly suitable for itself。
