CONSTRUCTION AND OPERATION


The cruise control system control section in the PHEV-ECU calculates the target torque, based on the signals sent from switches and sensors. Based on that calculation, the cruise control system control section sends the target torque to the PHEV control section, and the cruise control ON/FF signal to the combination meter, respectively.
The PHEV control section controls the motor and the engine according to the target torque signal received from the cruise control system control section and the switch input signals to controls the vehicle speed.
The combination meter displays a cruise control indicator on the screen while the cruise control system is activated. "SET" is also displayed during constant speed driving.

SPEED LIMITER INFORMATION ON THE MULTI-INFORMATION DISPLAY



The Speed Limiter information is displayed on the multi-information display area in the combination meter.

A: CONTROL STATE


There are three control states as below.

  • LIMIT OFF
    When the speed limiter is in standby, the vehicle speed can exceed the set speed.
  • LIMIT
    When the speed limiter is in operation. The vehicle is controlled in order not to exceed the set speed.
  • OVER LIMIT
    When the vehicle speed is exceeding the set speed by more than about 3 km/h.

B: SPEED LIMITER ON INDICATION


When the speed limiter is started up, the speed limiter’s symbol is appeared.

C: SET SPEED


Set speed is appeared if it is stored.

BLOCK DIAGRAM


SYSTEM FUNCTIONS



SET FUNCTION


1.While the cruise control system is activated, press the "SET -" switch during driving at approx. 40 km/h or more. While the speed limiter system is activated, press the "SET -" switch during driving at approx. 30 km/h or more.
2.The cruise control system stores the vehicle speed when the SET - switch is released, and then performs a constant speed driving at the stored vehicle speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.When the SET - switch is operated while driving at the vehicle speed of low speed limit (approximately 40 km/h) or slower, the constant speed driving is not performed.

DECELERATION FUNCTION


1.During the constant speed driving, when the "SET -" switch is pressed and held for 0.5 seconds or longer, the vehicle is decelerated with the specified rate while the switch is pressed.
2.After that the SET - switch is released, the vehicle speed of that time is newly stored, and then the constant speed driving is performed at that speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.In addition, when the SET - switch is pressed for less than approximately 0.5 second, the vehicle speed is decreased by approximately 1.6 km/h from the constant speed driving speed. The decelerated speed is newly stored, and then the constant speed driving is performed at that speed. Every time the SET-switch is pressed briefly (within approx. 0.5 seconds), the speed limiter will store a lower vehicle speed by 1 km/h. The speed limiter will regulate the vehicle speed within that last stored speed.
4.When the SET - switch is pressed and held, and the vehicle speed is decelerated to low speed limit (approximately 40 km/h) , the low speed limit will be maintained.

RESUME FUNCTION


1.During the constant speed driving, press the CANCEL switch, or depress the brake pedal to cancel the constant speed driving. The speed limiter will be deactivated by pressing the CANCEL switch.
2.Afterward, when the RES + switch is pressed while driving at a vehicle speed of low speed limit (approximately 40 km/h) or more, a constant speed driving is performed at the vehicle speed stored when the constant speed driving was cancelled.

ACCELERATION FUNCTION


1.During the constant speed driving, when the RES + switch is pressed and held for approximately 0.5 seconds or longer, the vehicle is accelerated with the specified acceleration while the switch is pressed.
2.After that the RES + switch is released, the vehicle speed of that time is newly stored, and then the constant speed driving is performed at that speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.In addition when the RES + switch is pressed for less than approximately 0.5 second, the vehicle speed is increased by approximately 1.6 km/h from the constant speed driving speed. The accelerated vehicle speed is newly stored, and then the constant speed driving is performed at that speed. Every time the RES + switch is pressed briefly (within approx. 0.5 seconds), the speed limiter will store a higher vehicle speed by 1 km/h. The speed limiter will regulate the vehicle speed within that last stored speed.

CANCEL FUNCTION


When any of the following conditions are satisfied, the constant speed driving will be cancelled. The speed limiter will be deactivated by pressing the CANCEL switch.


EMERGENCY CANCEL FUNCTION


When the accelerator pedal is depressed fully to drive at higher speed than the stored speed, the speed limiter will be deactivated temporarily.

FAIL-SAFE FUNCTION


When one of the following conditions is met, the cruise control system function will be suspended until the system returns to normal condition. Also, when one of the following conditions is met, a constant speed driving is cancelled immediately. The speed limiter will be also deactivated.

When any of the following conditions is met, unless the vehicle is stopped and the electric motor switch power supply mode is turned off, the cruise control system function will be cancelled even when the system returns to normal. Also, if any of the following conditions is met, a constant speed driving is cancelled immediately.