โตโยต้า มอเตอร์สปอร์ต มาเลเซีย 2012

การแข่งขับรอบคัดเลือก Yaris และ Vios Lady Toyota Motorsport Thailand No. 72 Real Race (14 June 2012) # 3

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สนามบางแสน 2012
วีออสวันเมคเรซ 2012 No.29





H Drive Racing Dog Box Transmissions - BANGSAEN STREET CIRCUIT
H.DRIVE RACING Products Website: http://www.hdrive-racing.com Email: info@hdrive-racing.com Dog Box Transmission on Toyota VITZ Super 1500 - BANGSAEN CIRCUIT H.Drive Racing Dog Box Transmissions Dog engagement is normally used in racing applications where fast, precise shifting is needed. Dog gear engagement is facilitated by numerous large teeth (dogs) that mate into matching openings machined into the opposite surface of the drive gear. Unlike the synchro engagement, there is no synchronizing mechanism to assist in equalizing speed. Ideal gear selection—e.g. minimal clashing and wear of the dog rings—is achieved by quick shifts; the motto here is "the quicker the better", so bang away. There is no depressing the clutch in the conventional sense like with the synchromesh transmission. A momentary break in engine load until the shift is achieved by a quick throttle blip or clutch depression. The driver will then experience the dog ring engaging with the next gear and the throttle can be reapplied. With practice this can be done in milliseconds. In fact, a driver can preload the stick shift in the direction of the next shift, and then when he either blips the throttle or clutch the shifter will quickly click in the desired gear. With all else equal, dog-engagement gears are much stronger than synchro-engagement gears because without needing to make space for synchro rings, the gears themselves can be made thicker. The number of dogs (teeth) and the size of the openings determine the window of opportunity that the dogs have to engage during the shift event. Rings with a smaller number of teeth provide a more efficient, smoother shift quality. The downsides to this easier engagement are increased noise and abruptness on the shift.





Toyota Motorsports 2012 Rd 1 Rajamangala Stadium, Bangkok - Qualifying (19 May 2012)
Toyota Motorsports 2012 Rd 1 Qualifying, Rajamangala Stadium, Bangkok (19 May 2012)





โตโยต้า มอเตอร์สปอร์ต สนามที่ 1 2012
สนามที่ 1 2012 ราชมังคลากีฬาสถาน กรุงเทพ Toyota Motorsport Thailand No. 72 Real Race (31 May 2012) # 3




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