Honda CB-X Sequential Honda CB-X Sequential TransmissionTransmission

Glenda TagleGlenda TagleDavid K DempseyDavid K DempseyJessica S FremedJessica S FremedRanjith MathewRanjith MathewJustin F PreterJustin F Preter

Joseph T SalvinoJoseph T Salvino

::::O B J E C T I V EO B J E C T I V E::::To successfully model a 1979 Honda To successfully model a 1979 Honda

CB-X Sequential TransmissionCB-X Sequential Transmission

ChallengesChallenges Difficult AssemblyDifficult Assembly Requires multiple moving partsRequires multiple moving parts Accurate manual Accurate manual

measurementsmeasurements

Clutch&

Basket

Shift Forks

Gears& Shafts

Shift Drum

ModelModel

TransmissiTransmissionon

Also includes casing, bearings & rods

A Sequential TransmissionA Sequential Transmission

Manual transmissions Manual transmissions often feature a driver-often feature a driver-operated clutch and a operated clutch and a movable gear selector. movable gear selector. Most automobile manual Most automobile manual transmissions allow the transmissions allow the driver to select any gear driver to select any gear at any time.at any time.

A.k.a. A.k.a. Serial TransmissionSerial Transmission

Formal Definition…Formal Definition…The The sequential transmissionsequential transmission of the signal elements of a group representing a of the signal elements of a group representing a character or other entity of data. character or other entity of data. Note:Note: The characters are transmitted in a The characters are transmitted in a sequence over a single line, rather than simultaneously over two or more lines, as sequence over a single line, rather than simultaneously over two or more lines, as in parallel transmission. The sequential elements may be transmitted with or in parallel transmission. The sequential elements may be transmitted with or without interruption.without interruption.

Sequential manual Sequential manual transmissionstransmissions only only allow the driver to allow the driver to select the next-highest select the next-highest or next-lowest or next-lowest gear gear ratioratio. .

Gear AssemblyGear Assembly

Countershaft

Gears

Main Shaft

Casing

There are 2 sets of five gears that each sit on the main shaft (input) and the countershaft (output).

Connections:

• Cylinder

• Slider (counter)

E X P L O D E ! ! !

1st 4th

3rd 5th

2nd

11stst G E G E A RA R

22ndnd G E G E A RA R

33rdrd G E G E A RA R

Clutch & Clutch BasketClutch & Clutch Basket• Clutch provides a means of connecting the engine to the transmission

• A clutch is, essentially, a subcomponent designed to allow engagement or disengagement of the engine to the gearbox.

• Connection provided by clutch works on the principle of friction.

Shift ForksShift Forks

The Shift Forks move The Shift Forks move the slider-the slider-connected gears connected gears from gear to gear.from gear to gear.

The set of gear selector forks move to engage gears. Their significance lies mostly in their connection with the shifting drum.

Shift DrumShift Drum

Grooves

a.k.a. Ratcheting Drum

When shifting gears, you are essentially rotating a ratcheting drum. It is because of the drum that you shift in sequence. It achieves this by directly moving the gear selector forks via grooves cut into the drum, which in turn engage the gears.

Shift Forks + Shift Forks + DrumDrum

General Transmission AssemblyGeneral Transmission Assembly

Shifting Shifting GearsGears

END