Hondamatic: Difference between revisions
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{{short description|Automatic transmission}} |
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{{Unreferenced|date=December 2009}} |
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{{More citations needed|date=March 2019}} |
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{{Infobox |
{{Infobox automobile |
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|name=H2 |
|name=H2 |
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|manufacturer=[[Honda]] |
|manufacturer=[[Honda]] |
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|production= |
|production=1973–1988 |
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|successor=[[Honda H3 transmission|H3]] |
|successor=[[Honda H3 transmission|H3]] |
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|class=2-speed [[transverse engine|transverse]] [[automatic transmission]] |
|class=2/3-speed [[transverse engine|transverse]] [[semi-automatic transmission]] |
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}} |
}} |
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{{Transmission types}} |
{{Transmission types}} |
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:''See also [[list of Honda transmissions]] for other Hondamatics'' |
:''See also [[list of Honda transmissions]] for other Hondamatics'' |
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The '''Hondamatic''' (also called the '''H2''') was [[Honda]]'s first [[automatic transmission]]. |
The '''Hondamatic''' (also called the '''H2''') was [[Honda]]'s first [[semi-automatic transmission]]. It was produced from 1973 through 1988. The ''Hondamatic'' name continued to be used on [[automatic transmission|fully-automatic]] transmissions from Honda.<ref>{{Cite web|url=https://global.honda/heritage/episodes/1968hondamatic.html|title = Honda Global | the Hondamatic Transmission / 1968}}</ref> |
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==Design and Application== |
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The original Hondamatic, like all following Honda automatics, featured sliding gears on parallel axes rather than [[planetary gear]]s like most other automatic transmissions. The design is noteworthy because it preserves engine braking by eliminating a sprag between first and second gears{{Citation needed|date=May 2008}}. It also featured a unique shifting action controlled by stator torque rather than traditional hydraulics. The Honda [[torque converter]] had a [[Lockup_torque_converter#Lock-up_torque_converters|lockup]], leading the company to sell the original Hondamatic (which had just two forward gear ratios) as a 3-speed. The true 3-speed [[Honda H3 transmission|H3]] was launched in 1979. |
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The original Hondamatic, like all following Honda automatics, featured gears on parallel axes rather than [[planetary gear]]s like most other automatic transmissions. The two gears for each ratio - one driving and the other driven - are in constant mesh and each ratio is engaged by a dedicated clutch connected to one of the ratio's two gears. The clutches are hydraulically controlled, applying oil pressure to the desired "gear". Shifting between forward gears was done by simply sliding the gear selector (actually a hydraulic valve) from 1 to 2. It did not automatically shift, but because of the torque converter, could be driven entirely in second gear. The Honda automobile [[torque converter]] had a [[Lockup torque converter#Lock-up torque converters|lockup]], leading the company to sell the original Hondamatic (which had just two forward gear ratios) as a three-speed. The true three-speed [[Honda H3 transmission|H3]] was launched in 1979. In 1982 Honda introduced a four-speed fully-automatic (called ''Hondamatic Full-Auto''), followed by a fully-automatic three-speed in 1983. The semi-automatic version continued to be available in Honda's smaller cars, where it was gradually replaced by conventional automatics. With the 1988 remake of the [[Honda Acty|Honda Acty/Street]], the last Hondamatic was discontinued. |
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Applications: |
Applications: |
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* 1973– |
* 1973–1983 [[Honda Civic]] |
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* 1976– |
* 1976–1983 [[Honda Accord]] |
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* 1979 [[Honda Prelude]] |
* 1979–1982 [[Honda Prelude]] |
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* 1982–1986 [[Honda City AA]] |
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* 1982–1988 [[Honda Acty|Honda Acty/Street]] |
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==History== |
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Honda could not make a conventional planetary gearset automatic transmission without infringing on any patents. Honda eventually asked Borg-Warner to design a prototype transmission for their upcoming vehicles. However, Borg-Warner declined. This was due to Borg-Warner not having transmission specifications that were efficient enough for such a small engine like the 500cc Honda S500 and one that was able to be reliable at a maximum engine speed of 8000rpm. This led Honda to design its own transmission. They purchased a transmission from Borg-Warner for the purpose of developing an original transmission design. They tested their newly developed automatic transmission on the L700. When testing and refinements had been made, Honda sold their first automatic transmission in the N360.<ref>{{cite web|url=https://global.honda/|title=Honda Global - Honda Motor Co., Ltd.|website=Global.honda|accessdate=10 March 2019}}</ref> |
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==Motorcycle== |
==Motorcycle== |
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The Hondamatic was later used in Honda's 400, 450 and 750 cc [[motorcycle]]s |
The Hondamatic was later used in Honda's 400, 450 and 750 cc [[motorcycle]]s.<ref>[https://www.motorcycleclassics.com/classic-japanese-motorcycles/honda-cb750a-hondamatic Motorcycle Classics Nov/Dec 2011: ''The Honda CB750A Hondamatic'' ]</ref><ref>{{cite web|url=https://books.google.com/books?id=uPgDAAAAMBAJ&q=hondamatic&pg=PA31|title=American Motorcyclist|first=American Motorcyclist|last=Assoc|date=1 September 1977|publisher=American Motorcyclist Assoc|accessdate=10 March 2019|via=Google Books}}</ref> In this application, it was not a true automatic transmission, as the driver had to manually select one of the two gears. The transmission of the 750 Hondamatics incorporated two hydraulically controlled clutches (one for each gear), with the foot-operated gear selector operating the hydraulic valve. The 400/450 Hondamatics, however, have no clutches at all. The foot-operated gear selector physically moves a gear with "dogs" to change gear engagement, the same as on a non-Hondamatic motorcycle transmission. |
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Applications: |
Applications: |
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* |
*[[Honda CB750A|CB750A]] (1976–1978) |
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* |
*[[Honda CB400T#CB400A Hawk Hondamatic|CB400A Hawk Hondamatic]] (1978) |
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* |
*[[Honda CM400|CM400A Hondamatic]] (1979–1981) |
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* |
*[[Honda CM450A|CM450A Hondamatic]] (1982–1983) |
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==Scooter, ATV, and power equipment== |
==Scooter, ATV, and power equipment== |
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Honda also applies the Hondamatic name to a [[hydraulic]] piston-based [[continuously variable transmission]] used in [[motorscooter]]s, [[all-terrain vehicle]]s, and other types of [[power equipment]]. |
Honda also applies the ''Hondamatic'' name to a [[hydraulic]] piston-based [[continuously variable transmission]] used in [[motorscooter]]s, [[all-terrain vehicle]]s, and other types of [[power equipment]]. |
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Applications |
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* TRX500FA (2001–2011) |
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* TRX400FA (2004–2007) |
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==See also== |
==See also== |
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* [[List of Honda transmissions]] |
* [[List of Honda transmissions]] |
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==References== |
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<references /> |
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[[Category:Honda transmissions|H2]] |
[[Category:Honda transmissions|H2]] |
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[[Category:Automatic transmission tradenames]] |
[[Category:Automatic transmission tradenames]] |
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[[Category:Motorcycle transmissions]] |
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[[ja:ホンダマチック]] |
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Latest revision as of 15:44, 24 December 2024
 | This article needs additional citations for verification. (March 2019) |
| H2 | |
|---|---|
| Overview | |
| Manufacturer | Honda |
| Production | 1973–1988 |
| Body and chassis | |
| Class | 2/3-speed transverse semi-automatic transmission |
| Chronology | |
| Successor | H3 |
| Automotive transmissions |
|---|
| Manual |
| Automatic / Semi-automatic |
- See also list of Honda transmissions for other Hondamatics
The Hondamatic (also called the H2) was Honda's first semi-automatic transmission. It was produced from 1973 through 1988. The Hondamatic name continued to be used on fully-automatic transmissions from Honda.[1]
Design and Application
[edit]The original Hondamatic, like all following Honda automatics, featured gears on parallel axes rather than planetary gears like most other automatic transmissions. The two gears for each ratio - one driving and the other driven - are in constant mesh and each ratio is engaged by a dedicated clutch connected to one of the ratio's two gears. The clutches are hydraulically controlled, applying oil pressure to the desired "gear". Shifting between forward gears was done by simply sliding the gear selector (actually a hydraulic valve) from 1 to 2. It did not automatically shift, but because of the torque converter, could be driven entirely in second gear. The Honda automobile torque converter had a lockup, leading the company to sell the original Hondamatic (which had just two forward gear ratios) as a three-speed. The true three-speed H3 was launched in 1979. In 1982 Honda introduced a four-speed fully-automatic (called Hondamatic Full-Auto), followed by a fully-automatic three-speed in 1983. The semi-automatic version continued to be available in Honda's smaller cars, where it was gradually replaced by conventional automatics. With the 1988 remake of the Honda Acty/Street, the last Hondamatic was discontinued.
Applications:
- 1973–1983 Honda Civic
- 1976–1983 Honda Accord
- 1979–1982 Honda Prelude
- 1982–1986 Honda City AA
- 1982–1988 Honda Acty/Street
History
[edit]Honda could not make a conventional planetary gearset automatic transmission without infringing on any patents. Honda eventually asked Borg-Warner to design a prototype transmission for their upcoming vehicles. However, Borg-Warner declined. This was due to Borg-Warner not having transmission specifications that were efficient enough for such a small engine like the 500cc Honda S500 and one that was able to be reliable at a maximum engine speed of 8000rpm. This led Honda to design its own transmission. They purchased a transmission from Borg-Warner for the purpose of developing an original transmission design. They tested their newly developed automatic transmission on the L700. When testing and refinements had been made, Honda sold their first automatic transmission in the N360.[2]
Motorcycle
[edit]The Hondamatic was later used in Honda's 400, 450 and 750 cc motorcycles.[3][4] In this application, it was not a true automatic transmission, as the driver had to manually select one of the two gears. The transmission of the 750 Hondamatics incorporated two hydraulically controlled clutches (one for each gear), with the foot-operated gear selector operating the hydraulic valve. The 400/450 Hondamatics, however, have no clutches at all. The foot-operated gear selector physically moves a gear with "dogs" to change gear engagement, the same as on a non-Hondamatic motorcycle transmission.
Applications:
- CB750A (1976–1978)
- CB400A Hawk Hondamatic (1978)
- CM400A Hondamatic (1979–1981)
- CM450A Hondamatic (1982–1983)
Scooter, ATV, and power equipment
[edit]Honda also applies the Hondamatic name to a hydraulic piston-based continuously variable transmission used in motorscooters, all-terrain vehicles, and other types of power equipment.
Applications
- TRX500FA (2001–2011)
- TRX400FA (2004–2007)
See also
[edit]References
[edit]- ^ "Honda Global | the Hondamatic Transmission / 1968".
- ^ "Honda Global - Honda Motor Co., Ltd". Global.honda. Retrieved 10 March 2019.
- ^ Motorcycle Classics Nov/Dec 2011: The Honda CB750A Hondamatic
- ^ Assoc, American Motorcyclist (1 September 1977). "American Motorcyclist". American Motorcyclist Assoc. Retrieved 10 March 2019 – via Google Books.