Dynamic Laser Cruise Control System
System OutlineThe dynamic laser cruise control system allows the vehicle to travel at a constant speed. Also according to the signals from the laser sensor and steering sensor, the system controls the vehicle to travel maintaining a certain following distance in proportion to the speed of the vehicle ahead.
1. Setting
During driving under the ON-OFF SW ON condition (The cruise indicator is lit), when the - SET SW is operated at the vehicle speed higher than the lower limit vehicle speed for setting, the vehicle speed at the time the SW is turned OFF is set as a set speed and the control starts. However, when the SW is operated at the speed higher than the higher limit vehicle speed for setting, the higher limit vehicle speed is set as a set speed and the control starts.
During driving under the ON-OFF SW ON condition (The cruise indicator is lit), when the - SET SW is operated at a vehicle speed between the lower limit vehicle speed for setting and the high speed limit, the vehicle speed at the time the SW is turned OFF is set as a set speed and the control starts.
2. Changing Method of the Set Speed
1. How to lower the set speed
- During driving under cruise control, when the - SET SW is momentarily operated (For approximately 0.6 seconds), the set speed decreases in increments of 5 km/h per SW operation.
When the - SET SW is kept ON, the set speed decreases continuously in increments of 5 km/h until the SW is turned off.
However, if the set speed reaches the lower limit vehicle speed for setting, the set speed cannot be decreased any further.
When the set speed is changed, the vehicle decelerates to that speed (In some cases, the vehicle may accelerate).
- If the - SET SW is turned from ON to OFF when the vehicle speed exceeds the higher limit vehicle speed for setting while the vehicle runs down a slope, the higher limit vehicle speed is stored in the memory as the set speed to control.
2. How to raise the set speed
- During driving under cruse control, when the + RES SW is momentarily operated (Approximately for 0.6 seconds), the set speed increases in increments of 5 km/h per SW operation.
When the SW is kept ON, the set speed increases continuously in increments of 5 km/h until the SW is turned off.
However, if the set speed reaches the higher limit vehicle speed for setting, the set speed cannot be increased any further.
When the set speed is changed, the vehicle accelerates to that speed (In some cases, the vehicle may decelerate).
NOTE: The vehicle speed at the time the - SET SW was turned OFF is not reset if the - SET SW is turned ON when the vehicle is accelerated by depressing the accelerator pedal. In such cases, the set speed decreases by 5 km/h as described above.
1. Deceleration
- During driving under cruise control, turning ON the - SET SW decelerates the vehicle while the SW is ON. The vehicle speed is controlled using the vehicle speed at the time the SW is turned OFF as a set speed.
If the - SET SW is turned from ON to OFF when the vehicle speed exceeds the high speed limit while the vehicle runs down a slope, the vehicle is controlled with the high speed limit as a set speed.
- When the - SET SW is momentarily operated (For approximately 0.6 seconds), the set speed decreases in increments of 1.6 km/h per SW operation. However, if the SW is operated when the set speed differs from the actual vehicle speed by 5 km/h or more, the vehicle is controlled using the vehicle speed at the time the SW is turned OFF as a set speed.
2. Acceleration
- During driving under cruise control, turning ON the + RES SW accelerates the vehicle while the SW is ON. The vehicle speed is controlled using the vehicle speed at the time the SW is turned OFF as a set speed.
When the vehicle speed exceeds the high speed limit during the + RES SW operation, the vehicle is controlled with the high speed limit until the SW operation is finished. After the SW operation, the vehicle is controlled with the high speed limit as a set speed.
- When the + RES SW is momentarily operated (For approximately 0.6 seconds), the set speed increases in increments of 1.6 km/h per SW operation. However, if the SW is operated when the set speed differs from the actual vehicle speed by 5 km/h or more, the set speed is not changed.
- The vehicle speed at the time the - SET SW was turned OFF is reset when the vehicle is accelerated by depressing the accelerator pedal and the - SET SW is turned ON. However, when the SW is operated at the speed higher than the high limit speed, the SW operation is not effective.
3. The Lower Limit Vehicle Speed for Setting
- It means the lower limit speed in the set table range and is set at approximately 45 km/h. It is discriminated from the low limit speed.
- A set speed is not stored in the memory when the vehicle runs at the lower limit vehicle speed for setting or slower.
4. The Low Speed Limit
It means the lower limit speed in the controllable range and is set at 40 km/h. When the vehicle speed decreases below 40 km/h while the vehicle runs under cruise control, cruise control is automatically canceled.
Vehicle-to-vehicle distance control mode and constant speed control mode store the set speed in the memory at this time.
5. The Higher Limit Vehicle Speed for Laser Cruise Control Setting
It means the higher limit speed in the radar cruise control set table range and is set at approximately 135 km/h.
6. The High Speed Limit (Only in Constant Speed Control Mode)
It means the higher limit speed in constant speed control mode under cruise control and is set at approximately 200 km/h.
7. Resume
- If cruise control is canceled at the vehicle speed higher than the low speed limit, turning ON the + RES SW accelerates the vehicle to the set speed at the time cruise control is canceled.
- Under the follow-up control, when the driver or vehicle ahead changes lanes and the road ahead is clear, the vehicle accelerates automatically and gradually to a set speed. When the + RES SW is turned ON at this time, the vehicle speed can increase promptly (Only in vehicle-to-vehicle distance control mode).
8. Shift-Down Control
When the vehicle climbs a hill while running under cruise control, the gear may be shifted down by the A/T control. When the hill climb is judged to have finished, based on the throttle opening information, the gear is shifted up after a set time.
9. Cancel
Cruise control is canceled if the following signals are input under cruise control (Set speed is not erased).
1. Stop lamp SW ON (Brake pedal depressed)
2. D position circuit in park/neutral position SW from ON to OFF
- Gear is shifted from D or 4 position to other positions than D or 4.
3. CANCEL SW of CONTROL SW ON
4. ON-OFF SW OFF (Set speed erased)
5. During VSC operation