[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
Chrysler Group files S-1 for IPO; snapshot of R&D priorities; exploring a light-duty hydraulic hybrid
September 24, 2013
Chrysler Group LLC has filed a registration statement on Form S-1 with the US Securities and Exchange Commission (SEC) relating to a proposed initial public offering of common shares. Details of the offering—i.e., number of shares and price range—are yet to be determined.
However, the document not only provides a detailed look at the finances of the company, it also provides a quick recap of recent technology developments and some insight into the company’s immediate research priorities. Chrysler writes that its has “made the development of more fuel-efficient vehicles a priority to meet retail consumer preferences, comply with future regulations and as part of our commitment to sustainability.”
Citroën to show Cactus concept with Hybrid Air powertrain
September 06, 2013
|Citroën Cactus concept with Airbumps (not related to the Hybrid Air powertrain). Click to enlarge.|
At the upcoming Frankfurt Motor Show, Citroën will showcase its Cactus C-segment concept car, featuring, among other technologies, the Hybrid Air powertrain co-developed by PSA Peugeot Citroën and Bosch. (Earlier post.)
Hybrid Air is a full-hybrid solution combining compressed air and hydraulic power, with no battery required for energy storage. Hybrid Air combines a PureTech gasoline engine, a compressed air energy storage unit, a hydraulic pump/motor unit and an automatic transmission with an epicyclic gear train.
Bosch sees future requiring multiple powertrain technologies; the larger the vehicle, the more the electrification
June 18, 2013
|Powertrain technologies outlook up to 2020. Click to enlarge.|
At the company’s 61st Automotive Press Briefing in Boxberg, Germany, Bosch senior executives outlined the company’s view on the general future of automotive technology—“efficient and increasingly electrical”, and provided a thumbnail of the way they see—and thus are developing products for—sector-specific technology trends.
In general, said Dr. Bernd Bohr, Chairman of the Bosch Automotive Group, the pace of development continues to pick up, in the form of powertrain electrification and the automation of driving. Bosch does not believe there is just one powertrain solution for the future; most of the cars on the world’s roads are still running on diesel and gasoline, and things will stay that way for the rest of the decade, Bohr noted. However, “slowly but surely”, the number of alternatives is growing.
Bosch offers more details on the light-duty hydraulic-hybrid drive developed with PSA
March 05, 2013
|The concept and layout of the hydraulic hybrid system. Click to enlarge.|
Bosch, in collaboration with PSA Peugeot Citroën, is developing a hydraulic full-hybrid powertrain to reduce fuel consumption and CO2 emissions in light-duty vehicles. (Earlier post.) PSA is applying the technology in “Hybrid Air” vehicles from both Citroën and Peugeot (earlier post, earlier post), showcased at the Geneva Motor Show.
The hydraulic hybrid is system is designed to enable a boost effect that would normally be offered only by more complex electric drives. A conventional internal-combustion engine combines with hydraulic units and an accompanying gas (e.g., nitrogen) pressure accumulator and a reservoir to provide a brief boost to acceleration. Like electric hybrids, the hydraulic hybrid system is able to support gasoline and diesel engines in ranges where they do not work at optimum efficiency.
Peugeot to show 2008 HYbrid Air at Geneva show; more detail on operation
February 18, 2013
|Peugeot 2008 HYbrid Air. The energy tank can be seen in the central tunnel, and the low-pressure tank at the rear. Click to enlarge.|
The new hybrid combines a 3-cylinder gasoline engine with a compressed air/hydraulic motor/pump system comprising an energy tank containing pressurized air installed under the body in the central tunnel; a low-pressure tank at the rear suspension cross member acting as an expansion bottle; and a hydraulic unit consisting of a motor and a pump installed under the hood on the transmission.
PSA Peugeot Citroën and Bosch developing hydraulic hybrid powertrain for passenger cars; 30% reduction in fuel consumption in NEDC, up to 45% urban; B-segment application in 2016
January 22, 2013
|Elements of the “Hybrid Air” hydraulic hybrid powertrain under development for B, C, and D vehicles. Click to enlarge.|
Following the introduction of the Bosch electric axle-split hybrid in PSA Peugeot Citroën diesel vehicles (earlier post), the two companies are now planning to develop a hydraulic hybrid powertrain for passenger cars. The hydraulic system, which uses compressed air for energy storage, basically comprises two hydraulic units and their pressure accumulators. PSA says the technology—called “Hybrid Air”—will be fitted on B-segment models starting in 2016.
The hydraulic components (motor and pump) recover and store the energy generated by the internal combustion engine and by braking and deceleration (kinetic energy); kinetic energy from braking that would otherwise be lost as heat is converted into hydraulic energy and stored in a pressure accumulator. This energy can then be used to drive the car.