Hydraulic kers. Kinetic energy recovery system 2018-12-22

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Kinetic Energy Recovery Systems

hydraulic kers

The recovered hydraulic energy can also be used for other engine functions. Teams began testing systems in 2008: energy can either be stored as mechanical energy as in a flywheel or as electrical energy as in a battery or. Rugged technology with very short payback period Hydraulic axial piston pumps are driven by a turbocharger gearbox which enables kinetic energy to be harvested from the exhaust gas volume flow and converted into hydraulic energy. On the scale of a compact car, where hydraulic lines are thinner and pumps are smaller, passive radiation of this heat may in fact suffice allowing the system to be much simpler. The system developed by McLaren in conjunction with Mercedes for the 2009 season is an electrical based hybrid system.

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Kinetic Energy Recovery System (KERS)

hydraulic kers

However, the accumulators take up a considerable amount of space, and future production plans are focused more on using the technology in larger vehicles, like vans. In 2012 it was announced that the would use Williams Hybrid Power. The difference between the actual weight and minimum weight is leveled out by positioning ballast around the car to optimum effect. They aren't quite ready for production models just yet. Where else can ecology and economy be combined so easily? Archived from on December 28, 2008. It did take them a while to wake up to the fact that having teams spending so much time in wind tunnels meant that the winning teams had to own one or two of their own, a factor that had become increasing irrelevant to any kind of road car application.

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What is KERS and how it is used in Formula One?

hydraulic kers

The system is claimed to be much more affordable than competing electric and flywheel systems and was expected on road cars by 2016 but was abandoned in 2015. Solution 1 — the flywheel The flywheel is made from carbon filament wrapped round a steel hub and weighs 5kg. In the paper the proposed solution is presented, showing the simulation models and preliminary validation results including experimental devices assembled to perform the tests. Managing the battery is critical as the efficiency of a pack of Li-ion cells will drop if one cell starts to fail. Electrical solutions were a possibility but the power loses in energy transfer would be too great. Lap time benefits range from approximately 0. In this work it is proposed an innovative solution based on the adoption of a system aimed to recover braking energy in order to feed an efficient on board hydraulic actuation system.

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Design of a hydraulic servo

hydraulic kers

Once the company started developing the technology, it quickly became clear to Hilton and Cross that while F1 will make some money, the real growth will be in road cars. The hydraulic system is fully sealed so in F1 applications it is possible to use the normal car hydraulic system. However, in most designs the pressure tanks of accumulators are made of that make the pressure tanks somewhat expensive, but the price of carbon fiber has been forecasted to drop as economies of scale and manufacturing energy efficiency is reduced by 60% according to can lower the cost of manufacturing the tanks. Opting to develop the flywheel solution they sat down and roughed out the basics of a design. The transfer of the flywheel kinetic energy to the vehicle kinetic energy reduces the speed of the flywheel and increases the speed of the vehicle.

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KERS of the hybrid car: Flywheels and ultracapacitors give you a 10

hydraulic kers

Volvo says it will start testing a flywheel-based recovery system later this year. The motor is attached to the front of the 2. Formula One cars must weigh at least 640kg including the driver , but traditionally teams build the car to be considerably lighter and then use up 70kg of ballast to bring it up to weight. The vehicle remained in use so equipped until 2010. As luck would have it, sitting in the stands listening to his comments was Jon Hilton, who now runs just the type of small, high-technology company Mosley hoped would develop the systems for Formula 1. By shifting the gear, 20% of the kinetic energy can be stored in the flywheel, ready to give an acceleration boost by reshifting the gear.

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Hydraulic Regenerative Braking

hydraulic kers

When working a bit with hydraulics, I believe such properties can be achieved in diffent ways with modern components. Heavier drivers are at a particular disadvantage, an issue addressed by the raising of the minimum car weight for the 2011 season. Hybrid versions based on this concept are also being explored by other auto manufacturers, and indeed big rigs effectively control the airflow in their cylinders using brake retarders for additional, albeit lossy, stopping power. Maybe our Moderator; Ciro could facilitate this added discussion by combining the treads. These were a flywheel construction that would remain intact at these speeds, containment that retains everything in a crash or a failure, a vacuum seal and a bearing solution. However, the whole mechanism including the flywheel sits entirely in the vehicle's hub looking like a. Stuff like that - yeah, engineering analysis.

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Design of a hydraulic servo

hydraulic kers

For trucks and buses, this can also be less expensive than electric systems, due to the price of required for the latter. Usually an accumulator has an air bladder filled with nitrogen that is compressed by the hydraulic fluid within a giant piston. To reduce friction from a spinning shift and seals, Ricardo has a system of magnets along the edge of the flywheel and another set outside the housing, working as an electric generator. Volvo is the latest automaker to announce interest in flywheel power while Porsche has been using flywheels successfully in auto racing. Many of these systems are currently used in Formula 1 race cars because they enable these cars to achieve higher acceleration and longer times between pit stops.

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Formula One KERS explained

hydraulic kers

Flybrid has generated a set of generic design tools and been able to consider everything from long, slim cylinders to large, thin pancakes. These slides use concepts from my Jeff Funk course entitled analyzing hi-tech opportunities to analyze how the economic feasibility of kinetic energy recovery systems is slowly becoming better through improvements in batteries, hydraulic pumps, and flywheels. That in turn creates windage losses that sap power and produce enormous amounts of heat. Currently designs favour taking the drive from downstream of the transmission, although there are advantages to applying the drive direct to the engine. For the present time however, the compact form of hydraulic power conversion is already a mature technology. I point out that there's a lot on the forum already , it's worth reading old threads, then the guys you hang with on the forum, can take it to the next level.

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KERS of the hybrid car: Flywheels and ultracapacitors give you a 10

hydraulic kers

Many conventional truck and working machines are equipped with additional hydraulic tooling or manipulation systems which are usually fed through a mechanical connection with the internal combustion engine, involving a poor efficiency. This means that the 80bhp is available for anything up to 6. A chasing driver can use his boost button to help him pass the car in front, while the leading driver can use his boost button to escape. To achieve this they upped the speed of the flywheel massively to 64,500rpm, which allows a smaller, lighter flywheel but also means it has to be contained in a very robust structure in case of failure. Finally, a clutch separates the drive if the revs move beyond the limits of the system. Technical challenges with hydraulic hybrid vehicles include noise, size, and complexity.

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