1. Introduction
cruise
cruise control, i.e., cruise control (CRUISECONTROLSYSTEM) of CCS for short, also known as fixed means cruising speed, the speed control system, the automatic car is driving, its role is: once the car is set to the cruise state, the fuel supply amount of the engine will be controlled by the computer, the computer will continually adjusted according to road conditions and vehicle running resistance oil supply, driving in the car and always maintain the set speed without the need to manipulate the throttle. Using this arrangement, when driving on the highway for a long time, the driver controls the accelerator pedal would not go to reduce fatigue, while reducing unnecessary speed changes, the fuel can be saved.
cruise control systems have become standard equipment on high-class cars. In the US, the installation rate has reached more than 60%. On the flat road, the vehicle can maintain constant speed cruise control using the form, to reduce fuel consumption; during long-distance driving, the cruise control can be freed from the driver’s foot on the accelerator pedal up, thereby reducing the degree of fatigue; limited road speed sign, the driver can use the cruise control speed, no longer look at the speedometer, to focus on the road, which can promote safety. Generally, when the driver presses the brake pedal cruise control is automatically released.
2, the first to use
GM is the originator of the cable-car’s cruise control system, they will be the first allows the driver to drive a constant speed cruise control system of guyed a 1959 Cadillac series.
3, the basic function
cruise controlSystem function
(1) setting a vehicle speed: adjusting the vehicle speed when the set switch is pressed, when the traveling speed can be stored, and to maintain this speeds;
[123 ] (2) elimination: when brake pedal is depressed, the above-described function can be released immediately, but stores the set speed adjustment;
(3) recovery: recovery switch when pressed, can restore the original vehicle;
(4) a slight decrease of the vehicle speed; l speed.
fail-safe function
(1) low-speed automatic cancellation. When the vehicle speed is less than 40km / h, the vehicle speed stored disappeared and no longer restore the speed.
(2) cancellation of the brake pedal. Containing both the brake pedal switch, a signal for canceling ECU; the other is the direct cause the actuator to stop work.
(3) elimination of the various switches. In addition to utilizing the brake pedal cancellation, there is a parking brake, the clutch (M / T), the speed control lever (A / T) cancellation of the operation switch and the like.
4, Category
1, a mechanical cable-Dingsuxunhang (vehicle applied to the mechanical throttle cable)
[ 123] 2, electronic throttle Dingsuxunhang formula (for a vehicle electronic throttle)
3, multifunctional cruise control (for a vehicle electronic throttle)
[ 123] 5, features
cruise control
cruise
main a vehicle speed sensor is read by the cruise control assembly sent speed pulse signal is setComparison, issuing an instruction by the electronic calculation precision, to ensure the most accurate fuel supply amount of the vehicle at a set speed.
Electronic saving function
intelligent optimization mainly through controlling the throttle opening angle and the opening time, since the accelerator sensor effectively shield electronic bumpy road and bad driving habits formed clutter signal, calculates the injection quantity precisely, so that the fullest fuel combustion, fuel economy is achieved.
throttle acceleration function
The main sensitivity is achieved, when the system has found the driver wishes to accelerate, drives the throttle is opened as quickly as possible by improving the throttle response , so that the sensitivity of throttle response is improved. When the accelerator pedal is depressed, the controller calculates the rate of change of the accelerator depression signal according to the magnitude, the time, the faster the change, the more intense the requirements described acceleration, throttle response and ultimately faster, sense the vehicle’s power significantly increased that allows the driver to feel the vehicle power greatly enhanced.
speed setting function
by the controller in accordance with a defined speed value, setting the maximum output signal of the throttle when the throttle setting is over, but the output signal maximum speed limit to achieve the purpose.
Brake fault alarm
, when the safety brake or brake circuit failure, will prompt the driver to take the signal by the brake circuit by way of an alarm.
6, using the conditions of
1. Cruise control to be used on the highway or road closed in principle. Because non-closed road, complex road conditions not conducive to traffic safety. In the national highway, a number of tractor power shortage, often in small intersection rushed pavement, on State Road car is a serious threat, in the case of cruise control, easily caught by surprise. Repeatedly brake can not maintain a stable state of the cruise control, the constant speed meaningless;.
2 caution rain, snow and ice days disabled;
3. Excessive mountain drive or detours, to be used with caution. Because we are in the case of a normal curve, to properly refuel provide greater steering force. Automatic vehicle cruise state is maintained at a constant vehicle speed, the throttle is controlled by a trip computer, often a danger to traffic detours. If in this condition, the speed should be appropriately controlled;.
4 many vehicles on the road, it is not suitable for use cruise control.
7, related events
incident scene
November 19, 2012, a car bound for Shanghai, Zhejiang constant speed cruise locked, bolted to 125 yards an hour and a half.
driver driving a value of $ 200,000 Toyota imported cars ready when the high-speed, suddenly found his car brake failure, the car can not be stopped. When the driver is using the cruise control, the vehicle speed of about 125 yards, the deceleration preparation, all systems are all found the car paralyzed. On the highway under the driver was forced to reluctantly go on and on, without brakes, without any protection case, at a rate of 125 yards it has been open from 17:00 to 19:00. Finally, the car hit the front of a large truck came to a halt, the owner did not cause illness.