Within the early Nineteen Nineties, Toyota noticed that environmental consciousness and tighter emissions laws would form the way forward for the automotive business. The corporate aimed to create an eco-friendly, environment friendly automobile that might meet future requirements.
In 1997 Toyota launched the Prius to the Japanese market. The automobile was the world’s first mass-produced hybrid automobile that mixed gasoline and electrical energy to cut back gas consumption and emissions. Its worldwide debut got here in 2000.
Creating the Prius posed vital technical and market challenges that included designing an environment friendly hybrid energy prepare, managing battery expertise, and overcoming client skepticism about combining an electrical drivetrain system with the usual gasoline-fueled energy prepare. Toyota persevered, nevertheless, and its instincts proved prescient and transformative.
“The Prius will not be solely the world’s first mass-produced hybrid automobile, however its technical and industrial success additionally spurred different automakers to speed up hybrid automobile growth,” says IEEE Member Nobuo Kawaguchi, a professor within the computational science and engineering division at Nagoya College’s Graduate College of Engineering, in Japan. He’s additionally secretary of the IEEE Nagoya Part. “The Prius helped form the position of hybrid automobiles in right this moment’s automotive market.”
The Prius was honored with an IEEE Milestone on 30 October throughout a ceremony held at firm headquarters in Toyota Metropolis, Japan.
The G21 venture
The event of the Prius started in 1993 with the G21 venture, which targeted on gas effectivity, low emissions, and affordability. In accordance with a Toyota article detailing the venture’s historical past, by 1997, Toyota engineers—together with Takeshi Uchiyamada, who has since turn out to be referred to as the “father of the Prius”—had been glad they’d met the problem of attaining all three targets.
The primary-generation Prius featured a compact design with aerodynamic effectivity. Its groundbreaking hybrid system enabled clean transitions between an electrical motor powered by a nickel–metallic hydride battery and an inside combustion engine fueled by gasoline.
The automobile’s design integrated regenerative braking within the power-train association to boost the automobile’s vitality effectivity. Regenerative braking captures the kinetic vitality usually misplaced as warmth when standard brake pads cease the wheels with friction. As an alternative, the electrical motor switches over to generator mode in order that the wheels drive the motor in reverse slightly than the motor driving the wheels. Utilizing the motor as a generator slows the automobile and converts the kinetic vitality into {an electrical} cost routed to the battery to recharge it.
“The Prius will not be solely the world’s first mass-produced hybrid automobile, however its technical and industrial success additionally spurred different automakers to speed up hybrid automobile growth.” —Nobuo Kawaguchi, IEEE Nagoya Part secretary
In accordance with the corporate’s “Harnessing Effectivity: A Deep Dive Into Toyota’s Hybrid Know-how” article, a breakthrough was the Hybrid Synergy Drive, a system that enables the Prius to function in numerous modes—electrical solely, gasoline solely, or a mix—relying on driving situations.
A key part Toyota engineers developed from scratch was the ability break up machine, a planetary gear system that enables clean transitions between electrical and gasoline energy, allowing the engine and the motor to propel the automobile of their respective optimum efficiency ranges. The association helps optimize gas economic system and simplifies the drivetrain by making a conventional transmission pointless.
Setting fuel-efficiency information
Practically 30 years after its industrial debut, the Prius stays an icon of environmental duty mixed with technical innovation. It’s nonetheless setting information for gas effectivity. When in July 2023 the newly launched 2024 Prius LE was pushed from Los Angeles to New York Metropolis, it consumed a miserly 2.52 liters of gasoline per 100 kilometers in the course of the 5,150-km cross-country journey. The report was set by a so-called hypermiler, a driver who practices superior driving methods aimed toward optimizing gas effectivity. Hypermilers speed up easily and keep away from laborious braking. They let off the accelerator early so the automobile can coast to a gradual cease with out making use of the brakes, they usually drive as usually as attainable at speeds between 72 and 105 km per hour, the velocities at which a automobile is usually most effective.
A driver not using such methods nonetheless can count on gas economic system as excessive as 4.06 L per 100 km from the most recent era of Prius fashions.
Toyota has superior the Prius’s hybrid expertise with every era, solidifying the automobile’s position as a pacesetter in gas effectivity and sustainability.
Milestone occasion attracts luminaries
Uchiyamada gave a short discuss on the IEEE Milestone occasion in regards to the Prius’s growth course of and the challenges he confronted as chief G21 engineer. Different notable attendees had been Takeshi Uehara, president of Toyota’s power-train firm; Toshio Fukuda, 2020 IEEE president; Isao Shirakawa, IEEE Japan Council historical past committee chair; and Jun Sato, IEEE Nagoya Part chair.
A plaque recognizing the expertise is displayed on the entrance of the Toyota Technical Heart, which is inside strolling distance of the corporate’s headquarters. It reads:
“In 1997 Toyota Motor Company developed the world’s first mass-produced hybrid automobile, the Toyota Prius, which used each an inside combustion engine and two electrical motors. This automobile achieved revolutionary gas effectivity by recovering and reusing vitality beforehand misplaced whereas driving. Its success helped popularize hybrid automobiles internationally, superior the expertise important for electrical energy trains, contributed to the discount of CO2 emissions, and influenced the design of subsequent electrified automobiles.”
Administered by the IEEE Historical past Heart and supported by donors, the Milestone program acknowledges excellent technical developments worldwide. The IEEE Nagoya Part sponsored the nomination.
