The "New Advanced Vehicle with Intelligence 5-speed" (NAVi5, also sometimes written "NAVI5" or "NAVI-5") was an automated manual transmission developed by Isuzu Motors Ltd. of Japan, and introduced in August 1984. It was initially developed for use in trucks, but was first made available in Isuzu's Askasedan and subsequently the Gemini and their other Japanese domestic market vehicles.[1] It preceded the likes of Alfa Romeo’s Selespeed and Opel’s Easytronic by more than a decade. It was superseded by the Smoother transmission in newer trucks.
Early NAVi5 shift lever (Isuzu Aska) 1: The first gear only. 2: The second gear only. D3 (Also labeled “Power"): The first three gears available. D5: All five gears available. R: Reverse.
The early version of the NAVi5 only had an automatic mode with an ability to lock out certain gears, thus operating in a manner similar to a traditional automatic. The later version added a manual mode, enabling the driver to select specific gears. The NAVi5 also came with autocruise and Hill-Start Aid as standard features.
A Japanese television commercial for the Aska heralded NAVi5 as “Not a manual, not a torque converter.” [5]
Receptionedit
The customer reactions toward the NAVi5 were mixed. Some liked the more “direct” feel and better fuel economy it offered compared to those of typical automatic gearboxes. Others, however, were turned off by what they felt as awkward shifting program and the acceleration gap during shifting. The NAVi5 also required gentle throttle operations when accelerating from standstill since it didn't offer creep function.
It was outsold by the conventional manual and automatic gearboxes in both the Aska and Gemini and subsequently dropped in the next generation Gemini. (Isuzu stopped manufacturing the Aska in-house after the first generation.)
Referencesedit
^ＧＰ企画センター編 [GP Planning Center] (September 2006), 日本自動車史年表 [Japan Automobile History Chronology] (in Japanese), Tokyo: グランプリ出版 [Grand Prix], ISBN4-87687-286-4
^別冊CG: 自動車アーカイヴ 80年代の日本 [Car Graphic: Car Archives Vol. 11, '80s Japanese Cars] (in Japanese). Tokyo: Nigensha. 2007. p. 242. ISBN978-4-544-91018-6.
^1985 ISUZU ASKA (NAVI5 transmission) Ad on YouTube
January 01, 1970
navi5, advanced, vehicle, with, intelligence, speed, also, sometimes, written, navi5, navi, automated, manual, transmission, developed, isuzu, motors, japan, introduced, august, 1984, initially, developed, trucks, first, made, available, isuzu, aska, sedan, su. The New Advanced Vehicle with Intelligence 5 speed NAVi5 also sometimes written NAVI5 or NAVI 5 was an automated manual transmission developed by Isuzu Motors Ltd of Japan and introduced in August 1984 It was initially developed for use in trucks but was first made available in Isuzu s Aska sedan and subsequently the Gemini and their other Japanese domestic market vehicles 1 It preceded the likes of Alfa Romeo s Selespeed and Opel s Easytronic by more than a decade It was superseded by the Smoother transmission in newer trucks Contents 1 Models 2 Features 3 Reception 4 ReferencesModels editThe NAVi5 was used in the following Isuzu vehicles Model Years Aska 2 August 1984 1989 Gemini 2nd generation 3 April 1986 Elf Light duty truck 1986 Cubic Bus 1989 Isuzu added the NAVi6 a six speed version to the following trucks Model Years Forward Medium duty truck 810 Heavy duty truck September 1986 Features edit nbsp Early NAVi5 shift lever Isuzu Aska 1 The first gear only 2 The second gear only D3 Also labeled Power The first three gears available D5 All five gears available R Reverse Unlike traditional automatic gearboxes with a torque converter and planetary gears the mechanical aspects of the NAVi5 are identical to those of a conventional five speed manual transmission with a dry clutch 4 The shifting and clutch operations though are done automatically by two hydraulic actuators connected to an electronic computer an 8 bit unit with 8 KB ROM and 192 KB RAM The early version of the NAVi5 only had an automatic mode with an ability to lock out certain gears thus operating in a manner similar to a traditional automatic The later version added a manual mode enabling the driver to select specific gears The NAVi5 also came with autocruise and Hill Start Aid as standard features A Japanese television commercial for the Aska heralded NAVi5 as Not a manual not a torque converter 5 Reception editThe customer reactions toward the NAVi5 were mixed Some liked the more direct feel and better fuel economy it offered compared to those of typical automatic gearboxes Others however were turned off by what they felt as awkward shifting program and the acceleration gap during shifting The NAVi5 also required gentle throttle operations when accelerating from standstill since it didn t offer creep function It was outsold by the conventional manual and automatic gearboxes in both the Aska and Gemini and subsequently dropped in the next generation Gemini Isuzu stopped manufacturing the Aska in house after the first generation References edit ＧＰ企画センター編 GP Planning Center September 2006 日本自動車史年表 Japan Automobile History Chronology in Japanese Tokyo グランプリ出版 Grand Prix ISBN 4 87687 286 4 別冊CG 自動車アーカイヴ 80年代の日本 Car Graphic Car Archives Vol 11 80s Japanese Cars in Japanese Tokyo Nigensha 2007 p 242 ISBN 978 4 544 91018 6 Car Graphic Car Archives Vol 11 80s Japanese Cars p 240 240 Landmarks of Japanese Automotive Technology 1985 ISUZU ASKA NAVI5 transmission Ad on YouTube Retrieved from https en wikipedia org w index php title NAVi5 amp oldid 1214899692, wikipedia, wiki, book, books, library,
