HAVAL H5 Cruise Control System

has been traveling for a long time on the highway, the

CRUISE CONTROL SYSTEM (CCS), after being activated by the driver, will automatically adjust the output power and torque according to the rolling resistance. In this way, the driver may drive the vehicle at a fixed setting speed without controlling the accelerator pedal.
The application of CCS can relieve the driver’s efforts, alleviate unnecessary speed change, enhance the comfortableness and safety in driving , save fuel and cut down emission.

the middle of 1970s)：in early stage, there are mainly two

kinds of CCS: mechanical CCS and air-actuated mechanical CCS.
For example, since 1965, Toyota Motor Corporation has installed mechanical CCS on its vehicles.

1980s)：there came out the digital signal-based CCS.
In order to realize

cruise speed regulation, the micro processor completes all data processing, produces drive signal output of stepping motor and changes the valve opening according to the instructed speed, actual speed, other input signal and preset procedures.

CCS and the fixed distance-controlled self-adaptive CCS abroad.
The system detects

the vehicle distance to the vehicle ahead by the FMCW radar, figures out relative speed and distance and provides these data to electronic control unit by the processing unit and regulates the speed through throttle, which is controlled by actuators.

realized through the driver’s set system, which takes the set

speed as the targeted speed.
(2) Fine adjusting the target speed: fine adjust the set speed to achieve the expected speed.
(3) Resuming the speed: after relieving cruise control initiatively or passively and before disconnecting master switch, resume the speed set previously by pressing “Reset”.

will cancel the cruise control mode automatically when the speed

changes abruptly in 1 second (for instance, the speed error is over 15km/h).
(5) Manipulating the process of cruise control relief : the driver disengages cruise control by pressing brake pedal and clutch pedal in cruise.

uphill, downhill or on even and straight road, the CCS

guarantees it to travel at uniform speed as long as the engine’s power is in agreeable range.
(2) Enhancing the comfortableness in driving: the application of CCS relieves driver’s fatigue.
(3) Saving the fuel: when the vehicle is traveling at constant speed, the system can realize the optimum match of fuel consumption and output power of the engine.

components of CCS
The CCS is mainly composed of cruise control

switch, brake switch, clutch switch, speed sensor, engine ECU, actuators and indicator lamp.
As the HAVAL H5 CCS is installed with an automatic transmission, the driver hasn’t to use clutch switch. As for the manual transmission model, if the driver presses the clutch in cruise, the system will cancel the cruise control mode automatically.

current earths and provides various voltage signals to engine ECU

after flowing through resistors with different resistance values. Then the engine ECU estimates the driver’s purposes based on these voltage signals received.
The cruise switch is installed on steering wheel.

The engine ECU receives speed signal through CAN and implements

closed loop control to cruise speed.

Speed sensor

the cruise switch. If the difference between the tested actual

speed and the set speed is beyond the allowable range, the engine ECU, after comparing those two signals, will produce and send a control signal to the fuel injector, so as to regulate the output power and torque. Then a constant speed is maintained.
Recently, the cruise control function is only available for luxurious, super-luxurious, elite and scuttle-configured HAVAL H5, which has 4D20 engine with corresponding 5AT automatic transmission.

Cruise switch signal

Speed sensor signal

Actuator (Fuel injector)

Brake switch signal

Cruise indicator

Engine ECU

you press the master switch, the indicator on the instrumentation

lights on, which represents that the cruise is on standby. Besides being on standby, in cruise the indicator lamp is also on.
b. Press the “CRUISE” button in cruise to close the cruise function.

vehicle to the desired speed. Then, press the “SET/-” button

on the steering wheel and release the accelerator simultaneously.

speed
When the user presses and holds the “SET/-” , the

cruise speed will reduce constantly. Release the button at your desired cruise speed.
The cruise speed will lower 3km/h for each pulse of “SET/-” button.

the cruise control is cancelled in cruise (pressing brake pedal

for example) but the system is still on standby, click the button to resume the speed before the cancellation of function as long as the corresponding conditions are satisfied.

you press and hold the “RES/+”button in cruise, the cruise

speed will increase continuously.
The speed will increase 3km/h for each time for each pulse of “RES/+” button.

“CANCEL” button in cruise, the cruise control will be cancelled.

over 60km/h is compulsory.) and click master switch “CRUISE” .

Then, the indicator lamp on instrumentation lights up and will keep on in cruise (please refer the attached diagram for details) .
Then, click the “SET/-” button on steering wheel and release accelerator pedal simultaneously. The vehicle will run at your set speed, which will be screened on the LCD of instrumentation as number.

Cruise control strategies and setting

on instrumentation will light up; the lamp will be always

on both in ready status and in cruise.

accelerated by any one of the following operations:
When you press

and hold the “RES/+” (for more than 0.4s), the cruise speed is increasing continuously; and then relieve the button at your desired speed. That is to say the vehicle can cruise at this speed.
The speed will increase 3km/h for each pulse of the “RES/+”(less than 0.4s).

in cruise, press the accelerator pedal to a certain value.
The

speed increase has no influence on the operation of CCS and the set speed. After you release the accelerator pedal, the set cruise speed will resume.

in any one of the following cases:
When you press and

hold the “SET/-” button (for more than 0.4s but less than 100s), the speed is increasing continuously. Release the button at your desired speed.
The cruise speed will lower 3km/h for each pulse of the “SET/-”(less than 0.4s).
Caution: the cruise control will be cancelled automatically at the speed lower than 60km/h.

the following cases:
Pressing the brake pedal;
Pressing the “CANCLE” button on

steering wheel;
The speed is lower than 60km/h or quicker than 170km/h;
Cancellation resulted from malfunction;
The gear lever in transmission is operated to the Gear N;
Others.
Caution: canceling cruise doesn’t mean closing cruise function.

in cruise but the system is still on standby, click

the “RES/+” button to resume the speed before the cancellation of function as long as the following conditions are satisfied:
The speed is over 60km/h;
The master switch “CRUISE” is never closed.

the following cases：
Press the “CRUISE” button and the indicator lamp

on the instrumentation will go out;
Turn off the ignition switch.
If you want to resume the cruise mode after it was closed, reset the cruise according to “Cruise Setting”. .

lower than 60km/h without the accelerator pedal being pressed. It

is advisable to engage the cruise control on straight and smooth motorway.
It is not advisable to engage the cruise control in urban area, on zigzag, wet and sliding roads or in rainy and snowy days or any other atrocious weather. otherwise heavy traffic accidents may happen.

Review
CCS Overview
CCS Components

and Working Principle
Cruise Control Strategies and Setting