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The Subaru B5-TPH was a
The concept behind the B5-TPH was to design a car "for long-weekend etawaysfor couples." Contemporary news articles were generally supportive of the new design direction, which anonymous sources claimed would be used in a forthcoming Impreza. Subaru stated the next Impreza would not be based on the B5-TPH's styling, and that they would launch a hybrid vehicle based on the B5-TPH powertrain in Japan by 2007.
The TPH drivetrain featured an electric motor-generator sandwiched between the gasoline motor, which used the Miller cycle, and the automatic transmission. The electric motor was intended to reduce turbo lag and boost fuel economy, with an estimated consumption of on the EPA combined city/highway cycle. The B5-TPH used manganese lithium-ion batteries.
The gasoline engine had an output of at 6,000 RPM and of torque at 2,400 RPM. The electric motor had outputs of and of torque.
The TPH system was developed with the intent of mass production. Subaru's prior concept hybrid, the B9 Scrambler, featured a Sequential Series Hybrid Electric Vehicle (SSHEV) powertrain. In the SSHEV design, the electric motor was used as the sole source of propulsion up to , switching over to the gasoline engine above those speeds. The newer TPH system was more cost-effective because it used a more compact electric motor and battery.
The batteries were developed by NEC Lamilion Energy, Ltd., which had been co-founded in 2002 by
concept
A concept is an abstract idea that serves as a foundation for more concrete principles, thoughts, and beliefs.
Concepts play an important role in all aspects of cognition. As such, concepts are studied within such disciplines as linguistics, ...
shooting-brake
Shooting-brake (alternatively spelled shooting break) is a car body style which originated in the 1890s from horse-drawn carriage origins. The first automotive shooting brakes were manufactured in the early 1900s in the United Kingdom. The vehi ...
coupe with a Turbo Parallel Hybrid (TPH) powertrain made by Fuji Heavy Industries
, formerly , is a Japanese multinational corporation and conglomerate primarily involved in both terrestrial and aerospace transportation manufacturing. It is best known for its line of Subaru automobiles. Founded in 1953, the company was named ...
(FHI), introduced at the 2005 Tokyo Motor Show
The , called (TMS) until 2023, is a biennial auto show held in October–November at the Tokyo Big Sight, Tokyo, Japan for cars, motorcycles and commercial vehicles. Hosted by the Japan Automobile Manufacturers Association (JAMA), it is a recog ...
.
Design
The concept behind the B5-TPH was to design a car "for long-weekend etawaysfor couples." Contemporary news articles were generally supportive of the new design direction, which anonymous sources claimed would be used in a forthcoming Impreza. Subaru stated the next Impreza would not be based on the B5-TPH's styling, and that they would launch a hybrid vehicle based on the B5-TPH powertrain in Japan by 2007.
Technical
The TPH drivetrain featured an electric motor-generator sandwiched between the gasoline motor, which used the Miller cycle, and the automatic transmission. The electric motor was intended to reduce turbo lag and boost fuel economy, with an estimated consumption of on the EPA combined city/highway cycle. The B5-TPH used manganese lithium-ion batteries.
The gasoline engine had an output of at 6,000 RPM and of torque at 2,400 RPM. The electric motor had outputs of and of torque.
The TPH system was developed with the intent of mass production. Subaru's prior concept hybrid, the B9 Scrambler, featured a Sequential Series Hybrid Electric Vehicle (SSHEV) powertrain. In the SSHEV design, the electric motor was used as the sole source of propulsion up to , switching over to the gasoline engine above those speeds. The newer TPH system was more cost-effective because it used a more compact electric motor and battery.
The batteries were developed by NEC Lamilion Energy, Ltd., which had been co-founded in 2002 by NEC
is a Japanese multinational information technology and electronics corporation, headquartered at the NEC Supertower in Minato, Tokyo, Japan. It provides IT and network solutions, including cloud computing, artificial intelligence (AI), Inte ...
and FHI to develop a lithium-ion capacitor which promised better energy density
In physics, energy density is the quotient between the amount of energy stored in a given system or contained in a given region of space and the volume of the system or region considered. Often only the ''useful'' or extractable energy is measure ...
and durability compared to normal storage batteries
A rechargeable battery, storage battery, or secondary cell (formally a type of Accumulator (energy), energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a ...
. NEC Lamilion was later absorbed into Automotive Energy Supply Corporation, who would go on to supply the lithium-ion battery pack for the Nissan Leaf
The is a battery-electric car manufactured by Nissan, produced since 2010. It was offered exclusively as a 5-door hatchback until 2025, which since then has become a crossover SUV model. The term "LEAF" serves as a backronym to ''leading envir ...
electric vehicle.
References
External links
* * B5-TPH Cars introduced in 2005 Coupés {{Modern-auto-stub