What is SH-AWD?

Front and rear axles

1, system components

SH-AWD SH-AWD (free-wheel drive control system) of the sub actuating means mounted directly to the front portion of the drive bridge, it is assigned to the front axle of the torsion part, the other part is transmitted to the rear drive shaft unit through a carbon fiber. The rear of the drive unit is SH-AWD core component, which includes the three planetary gear sets and the clutch.

First, the torque transmitted from the drive shaft to the acceleration means located at the rear of the drive unit, which can travel in a straight line 1: 1 gear ratio of the torque transmitted to the rear axle. However, during cornering, the clutch operation by a hydraulic actuator assembly coupled to the planet carrier and the housing, an output shaft of accelerator can turn faster than the input shaft, the maximum increase of 5%.

axis accelerometer output means with one hypoid gear set is connected to the rotational drive torque of left and right rear axle 90, the rear SH-AWD driving unit more than the average two electromagnetic clutches directly after the bridge, by controlling the clutches, the former may be changed, the torque distribution. Depending on the circumstances, the rear wheels can obtain a 30% to 70% of the total output of the engine, directly to the left and right sides of the electromagnetic clutch can be controlled separately, the limit torque may be assigned all of the wheels of the rear axle to a top.

development of automotive technology today, has been difficult to achieve integrated control of the vehicle by a simple mechanical structure, by a plurality of sensors required to accurately determine the state of the vehicle and the driver’s intention before making a correct response. ECU SH-AWD ECU and the engine ECU and a vehicle stability assist (VSA) brought together, it is obtained from the ECU the engine speed, intake manifold pressure and the gearbox transmission ratio signal, obtained from the VSA ECU’s lateral acceleration, wheel speed and the steering angle data, a comprehensive analysis of these data, SH-AWD is engaged ECU calculate the most reasonable distribution ratio, and the front and rear torque is achieved by controlling the acceleration device and the left and right electromagnetic clutches directly distribution. In cornering acceleration, ECU can steering angle based on the lateral acceleration andDetermining the driver’s intention, and apply greater torque in the outside rear wheel, thereby actively assist steering torque providing appropriate.

2, a similar system

SH-AWD having a four-wheel drive system as well as a similar function of the assembled S- Evolution 8 the AWC, it is achieved good steering performance by active ACD center differential and super active yaw control system super AYC, although different structures, but they are active on the rear wheels through the torque difference is formed to assist steering, in order to achieve the most excellent handling characteristics.

on the MDX, RDX and RL Currently, this system has been fitted in the Honda of the Acura.

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