The compact all-wheel drive SUV Toyota Rav 4 has been produced since 1994. During the model's existence, the manufacturer carried out several vehicle upgrades. The greatest interest among motorists is the all-wheel drive of the car. The Toyota RAV4 model is interesting with its intelligent Dynamic Torque Vectoring AWD. More recently, the Japanese company began producing a vehicle with fifth-generation AWD. What kind of system is this? How does it work and what are its features?
Toyota RAV4 Nothing extra) › Logbook › How all-wheel drive works on the 3rd generation RAV4.
Here are the experts’ words:
The new Integrated Active Drive system coordinates the operation of the stabilization system, all-wheel drive and electric power steering. For its sake, Toyota even abandoned permanent all-wheel drive in favor of a rear axle connected by an electromagnetic clutch (a similar solution has already been used on the Nissan X-Trail or Ford Maverick crossovers. But at the same time, the Integrated Active Drive system ensures a consistency in the operation of the listed systems that is still unattainable for competitors. For example, To get the car out of a skid, not only does the fuel supply change and the wheels are individually braked, but the share of torque supplied to the front wheels is also regulated - from 55 percent to 100. At the same time, the force on the steering wheel changes so as to tell you which way you need to turn the steering wheel
Here are other words from experts -
We were able to evaluate the handling both on dry asphalt and on slippery roads, where much depends on the settings of the all-wheel drive transmission. The undisputed leader is the Toyota RAV4. On asphalt, a well-tuned chassis allows you to confidently control the trajectory even at high speeds, and the Toyota takes sharp turns easily and without frightening rolls. And if the tire grip limit is exceeded, the non-switchable VSC stabilization system will delicately intervene in the control process. But the main surprise awaited us on the snow-covered roads of the training ground. Where it was necessary to mobilize all the “extreme” skills in order to steer the car into a turn, the Toyota driver only had to turn the steering wheel - and the car willingly, playfully went into the turn! And what is no less important, he left it just as willingly, according to the desired trajectory. Delight! In addition to the consistency of the kinematics of the suspension and steering, the Integrated Active Drive system has become a huge help. The bottom line is that it supplies the front or rear wheels with exactly the portion of torque that is needed to corner as quickly as possible. Moreover, depending on the situation, the electric power steering can “weaken” the returning force, helping the driver to correctly adjust the steering angle. Moreover, the system works very naturally - you don’t feel any “synthetics”, no irritation from unceremonious interference in such a delicate process as driving a car in a slippery turn. And the fact that the driver has exceeded the tire grip limit is indicated by a flashing light on the instrument cluster and a buzzer. It may not be gambling, but it is extremely safe behavior! Or maybe... Maybe it’s the other way around - dangerous? After all, if a driver who is accustomed to the “Rafik” gets behind the wheel of another car, then, no matter the hour, he will fly off the road at the very first slippery turn! But if we approach it from such a position, then we will not see progress in the field of active safety.
And other words from other experts about the same -
The chassis is tuned perfectly: Toyota follows the steering wheel exactly, only swaying slightly on the waves. The sensitivity of the steering, its information content - everything is perfect! And if in a sharp turn the driver overdoes the traction, the Integrated Active Drive stability control system will deliver to the wheels only that part of the torque that is necessary to confidently perform the maneuver - without drifting or skidding. The IAD complex controls the non-switchable stabilization system, all-wheel drive (the degree of “compression” of the clutch changes) and electric power steering. Even in a turn with an uneven surface (snow-ice-asphalt), Toyota does not shy away from the sides, but goes where it needs to go. The height of reliability and convenience! And - a well-deserved victory in the “Dynamics” category.
Modifications and prices
And the fact that the driver has exceeded the tire grip limit is indicated by a flashing light on the instrument cluster and a buzzer. It may not be gambling, but it is extremely safe behavior! Or maybe... Maybe it’s the other way around - dangerous?
But if we approach it from such a position, then we will not see progress in the field of active safety. At the same time, the force on the steering wheel changes so as to tell you which way you need to turn the steering wheel taken here - http: The undisputed leader is the Toyota RAV4.
On asphalt, a well-tuned chassis allows you to confidently control the trajectory even at high speeds, and the Toyota takes sharp turns easily and without frightening rolls. And if the tire grip limit is exceeded, the non-switchable VSC stabilization system will delicately intervene in the control process.
But the main surprise awaited us on the snow-covered roads of the training ground. The power of the unit is horsepower.
It is known that this engine was transferred to the Toyota Rav 4 almost unchanged from the Toyota Camry sedan. Rav 4 fuel consumption depends on the type of drive.
For example, the consumption of Rav 4 for the front-wheel drive version of the crossover is 9. The all-wheel drive Toyota Rav 4 has higher consumption.
FakeHeader
It is known that the gasoline consumption of the Rav 4 in the city is Toyota Rav 4 - diesel. If in our car market the most popular fuel for most modifications of the Toyota Rav 4 is gasoline, then in Western European countries the bet is on the diesel Rav 4. Toyota Rav 4, which consumes diesel only six and a half liters of fuel per km, it is not inferior in dynamics to gasoline versions, and some of them even surpass.
Who will buy the new hybrid Toyota RAV 4? First of all, those who want to have a car with the most modern technologies.
The price for the hybrid Toyota RAV 4 is approximately the same as for the diesel version, a little more expensive, but not significantly. Therefore, now it makes no sense to buy a diesel engine to save fuel.
Review of Toyota Rav 4 2008 Toyota Rav 4
It is better to choose the Toyota RAV4 Hybrid, in which case you will benefit not only from fuel economy, but also from a car equipped with the most modern technologies.
All-wheel drive Rav 4 1st generation
The Rav 4 10 uses permanent all-wheel drive STD I , which is a follower of the traditional Toyota FullTime 4WD . The distribution of moments is made in equal proportions between the two rows of wheels. This is achieved through a symmetrical, tapered center differential. The locking design is a multi-disc hydromechanical clutch.
At the same time, RAV4 10 was equipped with two types of gearboxes:
- A241H – with hydraulic control system;
- A540H - with full electronic control, while on models released after 1994 there is no control button.
To adjust the load distribution between the axles, there is a button C.DIFF AUTO , which is located on the center console. It is only missing on Toyota RAV4 equipped with A540H type gearboxes manufactured after 1994.
When the button is disabled, 4WD works with a free center differential. By turning on the button, the distribution between the drive wheels can be adjusted automatically. In this case, the range of changes in the maximum blocking coefficient is limited by two selector positions - L and R.
For normal 4WD operation, it is recommended to constantly use the automated load distribution between the axles. It is displayed only when the vehicle is towed or when driving with a spare tire.
The Toyota RAV4 4WD STD I operating principle provides the best reliability and efficiency.
Second generation 4WD Rav 4 design
For the second generation Toyota Rav 4, a new type of 4WD was used. The all-wheel drive design is made according to the STD II . It involves blocking the center differential using a viscous coupling.
This design was previously used on Toyota cars, where mechanics were installed as a transmission. Despite the significant simplification of the design compared to the first generation models, reliability remained at the same level. At the same time, there is a significant decrease in characteristics.
The design provides for the combination of the center and front differential between the wheels. At the same time, five satellites are mounted in the latter. In normal operation, the Torsen rear limited-slip differential is not loaded, but can be forced into gear.
All-wheel drive Rav 4 3rd, 4th and 5th generations
Toyota RAV4 3rd, 4th and 5th generations use an automatic all-wheel drive system. It consists of a multi-plate clutch that is controlled electronically. The electronics signal transmits torque to the rear wheels. Clutch blocking is affected by front wheel slip and the stabilization system. This improves vehicle control on slippery surfaces.
The Rav 4 3 has a function for forced locking of the clutch when driving in off-road conditions at a speed of no more than forty kilometers per hour. For this purpose, there is a Lock button located on the center console.
To coordinate the operation of 4WD, electric power steering and stabilization system on the Toyota RAV4, the Integrated Active Drive . If you get into a skid, the system adjusts the fuel supply, brakes the wheels individually and distributes torque to the front axle in the range from 55 to 100%. The force on the steering wheel is also reduced for the direction in which you need to turn to get out of a skid. Especially for Integrated Active Drive, Japanese designers installed a plug-in electromagnetic rear axle clutch on the Rav 4.
The Toyota RAV4 all-wheel drive transmission has the following operating principle. The cardan shaft is connected via a coupling to the input shaft of the rear axle gearbox. In normal mode, only the front axle is engaged, but if necessary, torque is redistributed to the second axle.
Depending on the specific configuration of the Toyota RAV4, the following all-wheel drive control options can be used:
Using the AUTO button, which allows you to use two modes - 2WD and AWD. In the first, only the front axle will work, with the button disabled. And when it is turned on, 4WD goes into automatic mode, accordingly, the additional axle will be put into operation as needed.
By means of the LOCK button, which ensures operation in automated mode or with the maximum degree of clutch blocking. The second mode is activated after pressing.
Some models are equipped exclusively with an AWD complex, which functions constantly.
4WD hybrid Toyota Rav 4
Japanese developers also use hybrid all-wheel drive for the Toyota Rav 4. Its operation is ensured by a gearbox and an electric motor. The following variations are used:
- classic three-shaft;
- compact two-shaft with a low-power electric motor.
Their operating principle is identical. The front axle operates in constant mode. In this case, there is no direct mechanical connection between the axes. Connection to the rear operation is carried out through a separate electric motor -generator and a two-stage gearbox.
One of the types of all-wheel drive transmission Rav 4 5th generation
The new generation Toyota Rav 4 all-wheel drive is called Dynamic Torque Vectoring AWD . The work is based on torque vectoring, which allows you separately distribute the load on the rear wheels depending on road conditions. Also, the 4WD design allows the wheels to be completely disconnected from the incoming torque. This is possible thanks to the ratchet type coupling.
The features of the fifth-generation Toyota RAV4 all-wheel drive can theoretically improve cross-country ability and increase vehicle stabilization. Fuel consumption is also reduced due to the even distribution of torque across the wheels. When there is no load, the rear axle is automatically disabled.
Forced shutdown of VSC TRC, Method description, practice (RAV4-3) | Thread Posted by: Ferris
Once the procedure is started, you have thirty seconds to complete the process.
With practice, the procedure can be completed in about fifteen seconds, but unfortunately must be repeated every time the car is turned on.
1. Make sure the car is in Parking and the parking brake is released before you start. 2. Turn on the ignition (Start the engine). 3. Set the handbrake. 4. Depress the brake pedal fully and then release. 5. Depress the brake pedal fully and then release. 6. Release the handbrake. 7. Fully press and hold the brake pedal. 8. Apply and release the handbrake (the brake pedal is depressed). 9. Apply and release the handbrake (the brake pedal is depressed). 10. Release the brake pedal. 11. Set the handbrake. 12. Depress the brake pedal fully and then release. 13. Depress the brake pedal fully and then release"
How does four-wheel drive work?
All-wheel drive is an option, thanks to which all 4 wheels of the car are driven in permanent/temporary mode. As a result, the car is provided with excellent traction even with imperfect grip and does not suffer from skidding.
| View | Principle of operation | Engine position | Car type |
| Classic | Torque is supplied through the driveshaft to the transfer unit, then to the front and rear axles | Longitudinal, in a single unit with gearbox and clutch | Trucks, buses, SUVs |
| Based on front wheel drive | Using a power take-off gearbox, torque is transmitted via the propeller shaft to the rear axle | Longitudinal, transverse | Cars |
| Rear engine | Rear-axle drive is combined with reverse gear, permanently engaged on the front axle, can be switched off | In the back of the car | Vans, vans, minibuses |
All-wheel drive wheels rotate at different speeds, and if one loses momentum, the speed of the other increases, while at the same time the torque decreases.
With a single motor, torque power is delivered to the axles in several ways. The choice depends on the chassis typology, design priorities, and rotation method. Today there are 4 methods:
- Connectable.
- Constant.
- Multi-mode.
- Permanent on demand.
The differential lock system is used for difficult-to-pass surfaces. In this case, the revolutions of all 4 wheels are equal, and the torque depends on the degree of adhesion to the road surface.
The difference between permanent and all-wheel drive
Permanent all-wheel drive is reliable and allows the vehicle to be used on any type of surface. Its disadvantages are structural complexity, difficult control settings, increased weight and high fuel consumption.
All-wheel drive is more reliable from a mechanical point of view, easy to operate, and provides high cross-country ability to the vehicle. But the car cannot be driven on asphalt.
If you choose a drive type for Toyota RAV 4 - full permanent or plug-in - you need to check and evaluate the operating conditions. If there is no need to frequently move on soil with such changing properties as icy asphalt, snow ruts, hard surfaces with mud areas, then a plug-in drive is suitable. Otherwise, you will have to either frequently switch the system manually or overload the transmission, which does not always suit the owner of a RAV 4wd.
see also
Comments 91
Tell me how to turn on all-wheel drive on the latest generation RAV4, we’re sitting with a friend, dumbfounded
As far as I remember, it is full up to 40 km/h, it seems that at higher speeds it turns off, becoming forward. This is in simple words)))
I think the problems will start after 40 km/h
Hi all! I agree with those who are sure that everyone should understand why their car was made. Some special tests have nothing to do with real life, since there are much more other factors (except for the type of drive) that would influence the car’s performance in real life than in a test. RAV4 3rd generation - all-wheel drive is really made to reduce the cost of the model. But let's not forget that car manufacturers are trying to make them more economical in gasoline equivalent. I think no one will argue that driving on one axle is more economical than driving on two. And let's ask ourselves the question: What is best for me? Drive 50,000 km on permanent all-wheel drive, spending X thousand rubles on gasoline and actually using all-wheel drive 3-4 times, or on plug-in all-wheel drive but spending a third of X thousand rubles on gasoline LESS! ?
All-wheel drive Toyota RAV4
RAF4 with the latest generation 4wd all-wheel drive system, which has received expanded capabilities for movement on different types of roads, behaves more stable at high speeds.
What is the difference between the drive on Toyota RAV 4 versions 3 and 4:
- On a Toyota RAV 4 generation 3 in all-wheel drive, the multi-disc clutch is constantly running in auto mode. System locking depends on slippage and stabilizer. Off-road at speeds up to 40 km/h, the clutch is locked with the Lock button.
- All-wheel drive on the 4th generation Toyota RAV 4 works as follows: a vectorizer has appeared that distributes torque to the rear wheels separately. The ratchet type clutch is located on the rear and front axles. In this regard, there was no need for a stabilization system.
Now the rear wheels of the RAV 4wd receive up to 30% more torque, saving fuel consumption. But this is not the limit of optimization for modern cars: there is a tendency to replace permanent drives with on-demand drives.
The basic assembly of the RAV 4wd is equipped with the Dynamic TorqueControl AWD system: the new DynamicTorque VectoringAWD option will be offered as a possible configuration.
Review of Toyota RAV4 2.0 4WD (2016)
The first 5000 km.
The first 5,000 km have been completed. What's on your mind? What suits you and what doesn’t? In general, little information has been collected. I'll probably start with where they usually end. From the conclusion. Am I happy with the car? I’ll be honest: “I’m satisfied!” And now a little more specifically)
General impression.
After the Camry, it is of course inferior in terms of comfort. This is not the case when a crossover = a sedan in terms of comfort inside the car. And it seems that not everything is so critical. And there is enough space in the cabin both front and rear. And the review is at a good level. But there is no that feeling of freedom when you sit in the driver’s seat, and even more so on the back sofa, which was present in the Camry. To everything else, we add a more elastic (and in some cases even stiffer) suspension, and we get it. what we get). Of course, I understood that these were absolutely 2 (two) different cars. And I have no complaints about the RAV4. I received exactly what I bought. It’s just that the memories from Camry are still fresh, so I’m comparing and sharing.
