Three common power steering system the novella - electronic hydraulic power

Electro-hydraulic power steering system

So-called electro-hydraulic power Electro-hydraulic power steering EHPS for short, exactly the same the booster principle with mechanical hydraulic power, hydraulic pump driven by the engine via a belt while with mechanical hydraulic power the biggest difference is no longer in use, but replaced by a power-driven electronic pump.

Advantage of the electro-hydraulic power is first reflected in the energy, electronic pump driven by the energy generator and battery output power, the power of the engine itself is no longer consumed, the electronic pump start-up and shut down all controlled by an electronic system without do the steering movements, electronic pump off, that unlike mechanical hydraulic booster pump as always linkage with the engine, to further reduce energy consumption.

Electro-hydraulic power steering system steering control unit from the storage tanks, booster, electric pump, steering gear, power steering sensors, power steering control unit and the electric pump which is a whole structure.

Secondly, the electro-hydraulic power steering system of the electronic control unit, it is possible by the vehicle speed sensor, a lateral acceleration sensor, steering angle sensor, the sensor information processing, by changing electronic pump flow in real time to change the intensity of the size of the power steering, that is, along with speed variable power-assisted function. Of course, not only the electro-hydraulic power can be achieved help with the speed variable.

This hydraulic type EPS in the conventional hydraulic power steering system based on the addition of the solenoid valve for controlling liquid flow, a speed sensor and an electronic control unit, etc., the electronic control unit according to the detected vehicle speed signal, the control solenoid valve, so that the steering power magnification continuously adjustable to meet the high and low speed when the power steering requirements. Simply put, when the low-speed large steering, electronic control unit drives the electronic hydraulic pump to output large power at a high speed, so that the driver fight direction effort; automobile traveling at high speed, the hydraulic control unit drives the electronic hydraulic pump at a lower speed operation need not affect the high-speed hit shift at the same time, saving a portion of the engine power. Is the current use of the more common types of power steering systems in the form.

Compared to the electronic power steering system, it is unique in its more on the structure of a detection of the angular velocity of the steering wheel rotation speed sensor (power steering sensor).

Electro-hydraulic power features: both from the point of view of technology, function, or economic, electro-hydraulic power are more mechanical hydraulic power advantage, however, electro-hydraulic power did not able to replace the mechanical hydraulic power, mainly due to the following aspects:

An electro-hydraulic power costs higher. Relatively mechanical-hydraulic power system, adding the electronic control system replaced the electronic pump, electro-hydraulic power higher manufacturing costs, the technology is also more complex, also will increase the difficulty and cost of maintenance.

Reliability is less than the the mechanical hydraulic power. Electro-hydraulic power will appear to the steering mechanism and the failure of the hydraulic mechanism, but also increase the possibility of failure of the electrical system, and thus less than traditional hydraulic power system reliability.

Boost efforts are limited. Although there are obvious advantages to use the electronic pump, electronic pump, however, need to be driven by the electric energy of the generator is able to provide the maximum current of the power itself of the vehicle generator and the battery are limited, so the power of the electronic pump also restricted, capable of carrying the load is limited. Therefore, using electro-hydraulic power models are mostly small and medium-sized vehicles. Electro-hydraulic power systems on some vehicles need a larger boost efforts beyond the reach of the.

4. Evolution of mechanical hydraulic power system. With the development of the technology, with the speed of the electro-hydraulic power variable function in the evolution of mechanical hydraulic power system has been able to achieve (using electromagnetic valve technology), even in the mechanical-hydraulic power steering system based on the derived can active steering gear ratio, higher reliability and load bearing the mechanical hydraulic power system is still welcomed by the manufacturers. 

Bridgestone published third-generation RFT technology

A few days ago, Bridgestone has finally released their third generation RFT technology.RFT Run Flat Tire is a tire wall reinforced tires and the birth of its first-generation product in 1987, due to the tire wall thickening and strengthened in order to achieve the tire in case of lack of air is still safe to travel for a range requirements,vehicles, the occupants will be harder than the average tire Lang. Since 2005, with the tire wall reinforced rubber improved so that better comfort when driving, creating the second generation of the thickened tire, first-generation RFT can be said with experimental technology is a to the second generation of the RFT, began a large-scale practical propulsion, among the more well-known products include the Potenza RE050A RE070R However, although the second-generation products in the sidewall of the tire hardness decreased, even when used with rubber and tread design of higher technology, is bound in a state of comfort and ultimate grip aspect of something missing. The third generation of Run Flat Tire with a newer technology, to reduce the radial stiffness, with the ride comfort without losing the general tire. The new technology can also be used to develop a variety of high aspect ratio tires, but not confined to the low flat rate of movement of the tire.

Comparison of each generation Comfort

Usually the rigidity of the tire is indicated by 100 and carried generations RFT technology for comparison. The parameter is the less comfort Vietnam

High (tire size 245/40R18 93W. Compared to the third generation with a new reinforced rubber and the Fetus.

Third generation RFT Technical Summary

The design of the third generation RFT's core theme is to "control the heat. The tire wall strengthening type Run Flat Tire, if you want to enhance its comfort, then, the most effective method is to rubber-thinning and softening sidewall when the tire impact buckling movement of the tire wall so that heat generated increases. The durability (lost air pressure after the durability) to maintain and improve driving comfort improvement phase both at the same time, handle heat to become the biggest problem. Resolve this issue, Bridgestone use of three new development concept to be realized: First, the development of a new type of tire wall rubber; thermal characteristics and inhibit the deformation of the novel Taigu; Third, help tire wall cooling Cooling Fin technology. The effect of these three technologies to improve driving comfort, therefore, the most appropriate balance then reality based on the weight of the vehicle, the practical effect of automobile commercialization respective.

(1) relieve the fever of the new rubber sidewall reinforcement

"Nano Pro-Tech" technology can make a new tire wall carbon reinforced rubber molecules to form a more dispersed distribution of the friction between the carbon molecules will be reduced when the tire is giving pressure, inhibit fat calories fundamentally generation. Using this technique, the third generation RFT compared with the second generation, heat will be reduced to half of the original.

 

Wine is wine difference new Camry chassis deconstruction

A new generation Camry shape than the old style has changed considerably, with more extensive product line as well as the increase of displacement, after appearing on the market quickly attracted many consumers eye, while the younger is designed to cater to the public aesthetic standards, while also increasing its audience. What greater displacement, more dynamic appearance design can explain the Camry is completely free of prior consistent moderate image, today we will start from the chassis, to explore after all. Although the new Camry chassis structure and classic Camry is almost the same, but this has been brewing new bottle of wine, do not let the new wine compared to go down.

A new generation Camry in the suspension structure and training with the ordinary version of the Camry has no too big difference, still slants apparently comfort of training, but not because of the body more deliberate hanging adjust the more soft, comfortable with a toughness. The overall feeling of driving stand stable, but also seems to have a want to " wild " impulse, which is a new generation Camry brought driving experience.

Frame front half part, the new Camry with integral closure subframe, can provide good rigidity, so this generation Camry's sense of control has been a qualitative leap.

The subframe is the role of bearing engine, as well as the suspension arm part fixed point, is a frame extension function.
Chassis suspension from the aspects of shape with classic Camry and of no great distinction, but passed on suspension system reset, so that a new generation Camry in the texture of different driving two car, it has always been conservative style of the Toyota, can be said to be a bold move. Perhaps the Toyota knew, from the European rival recapture lost territory, or to directly impact the opponent 's strengths, handling. The adventures of a stroke from the author's point of view is successful, at least you will not criticize the Camry won't give you a solid, stable control.

Buick CDC full time active stability system

As the first past the luxury car is equipped with active chassis stabilization system is introduced into the senior car brand, Buick CDC full time active stability systems under the chassis technology of the new benchmark. With the traditional automobile suspension, the system passed over the chassis of the sensor scans per second pavement over 100 times, according to road conditions, vehicle speed and steering angle and other factors, automatically adjusting the suspension settings. The suspension system in " soft and hard " to switch freely between, either the acceleration, steering, braking or high-speed cornering, can ensure the vehicle stability control and comfort, reach the perfect unity, to obtain accurate steering feel solid.

Buick Regal GS variable damping shock absorber control element.
Comfort of the perfect unity, to obtain accurate steering feel solid.
CDC system to improve driving comfort at the same time, the safe driving of the vehicle has a role can not be ignored. For example, when the vehicle needs emergency avoidance when, the system can respond instantaneously, effective control of body sway, allows the driver greater confidence, enhance driving safety. In addition, CDC system can also be in the vehicle emergency braking, by adjusting the suspension damping strength, not only effectively control body in emergency braking attitude, as far as possible, providing for the comfort of the passengers riding environment, can shorten the braking distance, be safe driving technology security.

Give heat " dog " cool, Garrett GTi cold kit released

The sixth generation GTi advent fully fueled the confidence of the people of German vehicles into the price of less than 250,000 can buy a semi-pure GTi also has considerable value. Why is half pure? GTi sold in the country compared to abroad for various reasons in the output power decreased, DCC adaptive chassis castration, even the wheels are replaced with 17-inch. Though they have all the negative news, but the modification of domestic GTi fans enthusiasm is unabated.
As we all know, domestic original GTi is like a hot potato itself is not cooling general, six-speed DSG gearbox overheating problems abound for gearbox cooling kit are endless, but the cooling device is not to introduce today gearbox, but in the cold.
The original GTi cold unprecedented design between the tank and air-conditioning compressor, this design not only reduce the intake air temperature performance greatly reduced (the lower the intake air temperature, the greater the density of oxygen molecules combustion engine more fully the power along with obvious), but also another facelift in the cold more difficult. Small've heard many stores issued complain dismantle GTi original cold framework fixity instability occurs, so in many cases when the facelift have to re-design pipeline, while the re-design consideration is slight mistake will increase the probability of the occurrence of the Turbo lag.
Garrett is fully taken into account, especially developed for GTi sets in cold package for domestic cars, set corresponds to 400hp demand, another can cope with 600hp. Domestic GTi alone provide support and replacement ECU K04 turbo original engine is also difficult to reach 400hp GTi factory but to improve the cold heat, change the pipeline complex problem has been considered to have the best solution .
All based on the original piping from R & D, but Garrett's cold kit can not be regarded as the overall replacement intercooled Garrett considering the R & D process to dismantle the original cold replaced with a new product may cause performance to play excellent and framework overall change issues, especially in the cold body to set the position following the crash beams, this also means that the store can not be cold in its original removed directly docking the intake line to complete the installation. Body cooled down, so that the greater the windward side, cooling performance better effect than the original product.

Be a tiger with wings added Sabelt racing safety weapons

Since 1972, Italy Sabelt in the automotive and racing is almost synonymous with overall vehicle safety, in the global use of car safety belt in the research, development and production, to monopolize the market running. In addition, it has been recognized by the FIA series of car racing driver products, including clothing, helmets and gloves. Sabelt is the only European dynamic test can have high specifications laboratory company.
2008, company of Brembo of manufacturer of high performance brake system with the safety belt and child safety products manufacturer Sabelt set up a joint venture, the name as " the high performance Brembo ( Brembo Performance ) ". The newly established joint venture business will be in these two Italy enterprises outside of the original factory. Brembo with the share of 70% became part of the newly established joint venture holding enterprises. The deal helped Brembo Corporation business from the active safety products ( such as brake system ) expanded to passive safety products ( safety belt, racing with protective equipment, child safety products ).

Sabelt is a successful run manufacturer Ferrari, Aston Martin took two red Sabelt car safety belt, become the super run OME suppliers. In addition to the safety belt, seat has also made by Sabelt, such as the Ferrari Challenge Racer F458 and F430 cars were equipped with Sabelt seat, seat belts and steering wheel.

New technology of Brembo electronic braking system developed

When we are complaining about the electronic throttle kill us on the throttle to direct manipulation of time, the electric brake system could soon enter mass production and application stage. The world's largest brake system factory Brembo in Beijing have exhibited their investment in research and development, electric calipers with signal strength instead of brake oil flow, a motor to replace brake hydraulic pump, brake pipe wire instead of "Brake By Wire " electronic brake system.
Electronic braking system working principle is very simple. The driver to press the brake pedal, the brake pedal position sensor receives the stroke of brake pedal, brake system electronic processor computation to give the number of the corresponding electrical signal to the caliper, to drive the electric implementing agencies, to provide the corresponding braking force. Brembo is the world's first electronic braking research and development. This set of system testing. To put into application, the problem to be solved is to provide the electric actuator for less traditional hydraulic pump brake power, leading to its volume is huge, caused by steering and suspension system layout difficult difficult.

From the picture, we can see, the electronic brake calipers, volume is larger, the future need to optimize the design, or as a ABS actuator that side edge optimization, application, is a good method.
Electronic brake system has the advantages that the braking process, can be electronic stability system more finely intervention. The hydraulic brake system of ABS system, its working principle is the use of electromagnetic valve "on-off - on-off" way to control braking oil pump piston pushes on, to prevent wheel lock occurred long time, there is a " electric - hydraulic " conversion process. Compared with traditional hydraulic braking system, electronic brake system not only can directly use the electric signal for controlling the braking card clamp power, more and more advanced electronic stability system implement seamless linkage, achieve around four brake circuit independent control signal strength, achieve four wheel braking force independent variable effects, in any emergency situations can be used effectively tire force.

There is no denying the fact electronic programming, as well as by electrically driven execution module, can achieve more than the pure mechanical and human experience more accurate on motor control. For automotive electronic have milepost style sense, is the invention of Bosch electronic fuel injection technology, replaced by vacuum atomization carburetor, since we can see the advantages of electronic control. No doubt electronic brake subvert our understanding of the braking system, but more importantly, its appearance will make the car more secure. But going to ask a question, the electronic brake system, how to refit?