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Outline

Engine control when steering wheel operation starts:

― The engine control when the steering wheel operation starts is an engine control technology that enhances driving stability by optimizing the ground contact load on the tires according to the driving scenario. Smooth cornering and ride comfort are achieved by controlling the optimum longitudinal acceleration by the engine relative to the lateral acceleration based on the steering wheel operation.

Yaw momentum control when steering wheel operation returns:

― The yaw momentum control when the steering wheel operation returns is a brake control technology that enhances driving stability by suppressing the vehicle oversteer behavior by the application of extremely small braking force to the turning, outer front wheel. Improvement of handling stability such as when making lane changes or during emergency maneuvering at high speeds and when driving on slippery roads such as rain or snow-covered roads, achieving a high sense of driving safety.

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System Diagram

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Function/control

Engine control when steering wheel operation starts:

• The engine control (when the steering wheel operation starts) performs comprehensive control of the longitudinal and lateral accelerations (G) by immediately changing the drive torque of the engine in conjunction with the steering wheel operation, to optimize the load at the ground on the 4 wheels.

― When steering wheel operation starts:

• Reverse acceleration (G) is applied to the vehicle by reducing the engine drive torque, and the load moves to the front wheels, enhancing vehicle response.

Engine control when steering wheel operation starts:

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• When all of the following conditions are met, the PCM controls the engine drive torque.

― While driving

― During steering operation

Engine control when steering wheel operation starts:

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Yaw momentum control when steering wheel operation returns:

• The yaw momentum control when the steering wheel operation returns enhances vehicle driving stability by applying the optimum brake force to the turning, outer front wheel in conjunction with the steering wheel operation.

― When steering wheel operation returns:

• Yaw momentum is produced by applying the brake force to the turning, outer front wheel, and the vehicle approaches the target travel line, Vehicle stability enhancing.

Yaw momentum control when steering wheel operation returns:

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• Tire slipping, caused by a sudden steering wheel operation during emergency maneuvering can be prevented, enhancing vehicle stability.

• Because the vehicle inclination amount after emergency maneuvering is small and the operation for returning the steering wheel is small, the driver can drive with a sense of safety and leeway.

Yaw momentum control when steering wheel operation returns:

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