Infinitely-variable transmission for vehicle
A transmission and transmission technology, applied in transmissions, vehicle gearboxes, multi-gear ratio transmissions, etc., can solve the problems of torque converters that cannot be locked, high fuel consumption, power loss, etc., to reduce fuel consumption and save energy. The effect of manufacturing cost and operating cost reduction
Active Publication Date: 2015-08-05
ALLISON TRANSMISSION INC
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Problems solved by technology
However, at low speeds (where such a transmission will operate most of the time), this type of transmission has a significant disadvantage: the torque converter cannot be locked and will therefore cause a significant loss of power, and as a result equipped Vehicles with this transmission have high fuel consumption
Method used
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Embodiment Construction
[0036] refer to Figure 1 to Figure 3 , the transmission system comprises an input shaft 10 connected for an output shaft of an engine of the vehicle. The front output shaft 12 is connected for the final drive unit at the front of the vehicle and the rear output shaft 14 is connected for the final drive unit at the front of the vehicle. Auxiliary output shaft 16 is driven directly from input shaft 10 . Auxiliary output shaft 16 is used to drive accessory components of the vehicle, such as hydraulic pumps. The first spur gear 18 is carried on the input shaft 10 .
[0037] The transmission system includes a full toroidal variator 20 . This is a known construction and therefore only its main components will be briefly described here. The variator comprises two input discs 22 and two output discs 24 , each disc having a part annular recess whereby an annular cavity is formed between each input disc 22 and each output disc 24 . All discs have a common axis of rotation which in...
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An infinitely-variable transmission system is disclosed. The system comprises an input shaft (10) and an output shaft (14). The transmission is operative to transmit rotational drive between the input shaft (10) and the output shaft (14). The transmission includes a variator (20) that can transmit drive at a continuously variable ratio between a minimum variator ratio and a maximum variator ratio. The transmission can operate a low-speed regime and in a high-speed regime. The transmission is operative in the low-speed regime, at a neutral low regime variator ratio, the transmission is in geared neutral, in which, the output of the transmission is stationary irrespective of the speed of the input of the transmission and at a maximum low regime variator ratio, the output of the transmission is driven from the input of the transmission at a maximum low-regime transmission ratio, In the high-speed regime, at a minimum high regime variator ratio, the output of the transmission is driven from the input of the transmission at a minimum high-regime ratio and at a maximum high regime variator ratio, the output of the transmission is driven from the input of the transmission at a maximum high-regime transmission ratio.
Description
technical field [0001] The present invention relates to an infinitely variable transmission (IVT) for a vehicle. It applies particularly, but not exclusively, to vehicles that must frequently reverse their drive direction and have efficient launch characteristics in both forward and reverse directions / reversal, as well as features of loaded vehicles, such as backhoes back-hoe loader, wheel loader or forklift / fork-lift. Background technique [0002] Backhoe loaders require transmissions with rather unusual drive characteristics. During loading operations, the direction of drive changes frequently, and high torque must be delivered to the drive wheels in either direction when the vehicle is stationary or near stationary. Loading operations usually take place at low speeds. However, the transmission must also provide high speed drive (which needs to be in only one direction) to allow the vehicle to move from one location to another, such as on a highway. [0003] Transmissi...
Claims
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IPC IPC(8): F16H37/08
CPCF16H2037/0886F16H2200/2005F16H2037/0893F16H37/086
Inventor P.温特C.格伦伍德
Owner ALLISON TRANSMISSION INC