摘要:
One implementation of a six-speed transmission includes a first gearset including first and second planetary gearsets each having a number of teeth. The transmission also has a second gearset including a third planetary gearset operably associated with the first and second planetary gearsets. The third planetary gearset has an equal number of teeth with respect to one of the first and second planetary gearsets. The transmission also has a first plurality of shift elements operably associated with the first and second planetary gearsets, each of the first plurality of shift elements being movable between a released state and an applied state to selectively engage at least one of the first and second planetary gearsets. The transmission also has a second plurality of shift elements operably associated with the third planetary gearset, each of the second plurality of shift elements being movable between a released state and an applied state to selectively engage the third planetary gearset. The transmission also has a controller operably associated with the first plurality of shift elements and the second plurality of shift elements to selectively engage the first, second and third planetary gearsets.
摘要:
One implementation of a six-speed transmission includes a first gearset including first and second planetary gearsets each having a number of teeth. The transmission also has a second gearset including a third planetary gearset operably associated with the first and second planetary gearsets. The third planetary gearset has an equal number of teeth with respect to one of the first and second planetary gearsets. The transmission also has a first plurality of shift elements operably associated with the first and second planetary gearsets, each of the first plurality of shift elements being movable between a released state and an applied state to selectively engage at least one of the first and second planetary gearsets. The transmission also has a second plurality of shift elements operably associated with the third planetary gearset, each of the second plurality of shift elements being movable between a released state and an applied state to selectively engage the third planetary gearset. The transmission also has a controller operably associated with the first plurality of shift elements and the second plurality of shift elements to selectively engage the first, second and third planetary gearsets.
摘要:
An automatic transmission hydraulic control system is provided with lubrication and cooler circuits fed in parallel. The lubrication circuit is fed by regulated pressure which prevents lubrication starvation concerns under extremes of temperature and speed conditions. As the lubrication demand increases the controlled pressure increases the lube flow to meet the component lubrication requirements.
摘要:
A dual mesh gear system is provided for a motor vehicle transmission having three axes. The transmission includes two input shafts, first and second clutch assemblies, first and second countershafts, and an output shaft. The transmission uses a first dual mesh for gears four and six and a second dual mesh for gears five and seven. Reverse within the transmission is driven by a reverse driver gear fixedly attached to second gear on the second countershaft. The reverse driver gear is continuously meshed with a reverse driven gear on the first countershaft. The reverse gear combination achieves a reverse gear ratio greater than or equal to the gear ratio of first gear.
摘要:
The present invention provides a fluid pump for an automatic transmission which has at least one driven gear which has a hub portion insertable into the housing of the pump. By using this apparatus, the driven gear needs only to be aligned in one portion of the pump housing. This eliminates the need to align bores in both halves of the pump housing and to align the post section of the driven gears with the bores in the pump housing.
摘要:
A check valve which fits within a multi-diametered shouldered cavity formed within a pump valve body of a transmission. The check valve assembly has a movable valve element with a head to seal an annular aperture in a separator plate of the transmission. The valve element further has a stem axially extending into the cavity. The stem has an enlarged annular end. A base retainer has a spline formation in a central opening which allows the enlarged annular end of the stem to be inserted therein. After relative rotation between the base retainer and the stem of the valve element, the valve element is captured to the base retainer. A spring is captured between the stem of the valve element and the base retainer to bias the head of the valve element against the aperture provided in the transmission separator plate.
摘要:
A method for reacting an axial thrust load generated by a planetary gear system of an automatic transmission for an automotive vehicle is provided. The axial thrust load is transmitted along a first thrust load path between a sun gear of the planetary gear system and a clutch hub of an clutch assembly. The axial thrust load is then transmitted along a second thrust load path between the clutch hub and a thrust bulkhead extending from the transmission housing. A first portion of the axial thrust load is reacted by the transmission housing. A second portion of the axial thrust load is transmitted along a third thrust load path between the thrust bulkhead and an oil pump housing.
摘要:
A method of assembly for a north-south transaxle includes the steps of forming a case with a longitudinal passageway and having an opening generally perpendicular to the passageway. The method also includes forming a head portion and a shaft portion extending from the head portion and installing a front bearing about the transfer shaft and in the passageway. The method further includes installing the transfer shaft in the passageway, installing a rear bearing about the transfer shaft and in the passageway, and retaining the front and rear bearings and transfer shaft in the passageway.
摘要:
A north-south transaxle includes a case having a first passageway extending longitudinally and a second passageway spaced from the first passageway and being generally parallel to the first passageway and extending longitudinally. The transaxle also includes a transmission assembly disposed in the first passageway and having a first shaft portion extending through the first passageway at one end thereof and a transfer assembly disposed in the second passageway and having a second shaft portion extending through the second passageway at one end thereof. The transaxle includes first and second sprocket wheels disposed about the first and second shaft portions, respectively, a chain disposed about the first and second sprocket wheels and a snubber located on tension side of the chain for a dampening vibrations or excursions in the chain.
摘要:
A multi-speed automatic transmission includes a housing, a transmission input shaft, and a plurality of clutches. Different combinations of clutches of the plurality of clutches are engaged to generate different gear ratios corresponding to respective forward speeds of the automatic transmission. The plurality of clutches are positioned within the housing and include a first friction clutch coupled the input shaft and having a first hub, and a second friction clutch having a second clutch hub. The second friction clutch is disposed about the input shaft and radially nested within the first clutch hub such that the second friction clutch is positioned radially between the first clutch hub and the input shaft. The first friction clutch is engaged to generate at least two forward speeds of the transmission and the second friction clutch is engaged to generate seven forward speeds of the transmission including the two forward speeds.