Automatic transmission

 

(57) Abstract:

The invention relates to the field of transport and eliminates mechanical manual gear change in the gearbox while maintaining the high efficiency of the transmission. Automatic transmission consists of a double planetary gear set, the carrier of which is connected with the turbine wheel of the torque Converter input element of the planetary gear is connected with the engine, the output element of the planetary gear is connected with the pump wheel of the torque Converter, the reactor of the torque Converter is connected with the spool of the hydraulic system, the valve operates six disc couplings, including one in the work, while five other couplings depending on the torque on the driven shaft of the transmission. 3 Il.

The invention relates to the field of transport, the predominant use of the vehicle, marine and river vessels.

Known transmission [1], consisting of planetary gear, torque Converter, hydraulic node, node gear pairs, adopted for the prototype.

However, the automatic transmission did not find wide application for two main reasons: first, because of the big loss is to gearbox cars, while maintaining the efficiency of gearboxes such as a conventional manual transmissions.

The essence of the invention is that in an automatic transmission comprising a planetary transmission, torque Converter, hydraulic node, node gear pairs according to the invention, with the purpose of automation gear and saving high efficiency, applied double row planetary gear, together with the torque Converter, planetary carrier is connected with the turbine wheel of the torque Converter, the pump wheel of the torque Converter is connected with the second-row planetary gear with a high transmission ratio at the pump wheel of the torque Converter, and the reactor of the torque Converter through the tubular shaft reactor and the gear on the end of the tubular shaft is connected with the spool of the hydraulic node, the feed pressure of the fluid and bleeding the fluid pressure sequentially from disk clutch gear pairs of the transmission. Thus, the input to the transmission power of the engine with a double row planetary gear and the torque Converter is split into two parallel flow. The stream power is th cause of the power loss in the torque Converter are not 25-30% of the power of the engine, and just 0,06 (25-30), or 0.04 (25-30), that is, 1,2-1,8% at a flow of power through the torque Converter 6% of the engine power and 1-1,2% at a flow of power through the torque Converter 4% of the engine power.

In addition, unlike the prototype is that the reactor of the torque Converter has a kinematic feedback with the output shaft of a transmission of the vehicle and using the spool hub and node gear pairs with the disk clutch when changing the torque on the output shaft automatically switches required speed, reducing or increasing the torque output of the transmission with the aim of preserving the calculated torque and speed input to the transmission.

In Fig. 1 shows the kinematic and hydraulic circuit of the automatic transmission of Fig. 2 is a diagram showing changes in the hydraulic efficiency of the fluid coupling and torque of the fluid coupling as a function of speed of the turbine wheel of the fluid coupling to the speed of the pump wheel of the fluid coupling; Fig. 3 - plan of the velocities of the fluid in the fluid coupling when the estimated position sensor-reactor, as well as by increasing or decreasing the load on the driven shaft of the automatic transmission.

In Fig. 1 shows the static is CNY shaft; 5 - double-row planetary gear transmission; 6 - fluid coupling; 7 - reactor; 9 - tooth rake command slide valve; 10 - team spool; 11 - spring sensitivity to the increased speed of the output shaft; 12 - spring sensitivity to reduce the speed of the output shaft; 13 - 14 - tube tension spring; 15 - oil pump; 16 - pressure relief bypass valve; 17 - actuating valve; 18 - cylinder actuating valve; 19 - the piston actuating valve; 20 - cumulative springs sensitivity of the Executive spool; 21 - ball castles Executive spool; 22 - rocker control of disc couplings; 23 - disc clutch; 24 - channel hydraulic control disk clutches.

The operation of the automatic transmission.

When the calculated steady state operation of the automatic transmission torque of the drive shaft is leaking from the shaft 1 to the output shaft of the planetary gear 2 and then from the intermediate shaft 4 through the gear engages the pair of gears in which included any of the seven disc couplings 23 to the follower shaft 3. The reactor 7 is stationary, symmetric flown fluid fluid coupling with the velocity (Va) (see Fig. 3). Utility (Vc) (see Fig. 3) which surrounds the reactor at an angle, creating the force

< / BR>
where Cycthe lift coefficient of the reactor, S is the size of the reactor, the mass density of the fluid, the fluid coupling.

Gear reactor rigidly connected with the reactor rotates, moving the command spool up, combining channels hydraulic high pressure cylinder 18. With an estimated force on the piston actuating valve 19 will move the actuating valve 17, which in turn delivers the fluid pressure in the hydraulic system on downshift, the result is a slip of the fluid coupling, decreases thereby force Pcacting on the reactor 7, and it will be up until the force of the Pcwill be zero, or reaches the calculated values. When reducing the load on the driven shaft, the interaction is similar, but will only occur in the reverse order. In this case, there will be a force of Pb(see Fig. 3).

We offer automatic transmission ensures the full release of the driver, such as a car, with manual shift transmission, fuel economy because the engine will always run on the economy is cnyh manual transmissions. For example, at 100% engine power gear ratio of the planetary gear selected so that the power current through the led, was 90%, then when the calculated efficiency of the fluid coupling (see Fig. 2) 0,9 - 0,95 hydraulic power loss will be only 1% to 0.5% (hydraulic losses ordinary semi-automatic carton LAZ-NAII constitute 15-25%).

Automatic transmission comprising a planetary transmission, torque Converter, hydraulic node, node gear pairs, characterized in that, with the purpose of automation gear and saving high efficiency, applied double row planetary gear, together with the torque Converter, planetary carrier is connected with the turbine wheel of the torque Converter, the pump wheel of the torque Converter is connected with the second-row planetary gear with a high transmission ratio at the pump wheel of the torque Converter, and the reactor of the torque Converter through the tubular shaft reactor and the gear on the end of the tubular shaft is connected with the spool of the hydraulic node, the feed pressure of the fluid and bleeding the fluid pressure sequentially from disk clutch gear pairs of the transmission.

 

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