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The system consists of an electronic control unit (ECU), a hydraulic control unit (HCU), an electrically driven hydraulic pump and a set of sensors. These sensors typically are: a steering wheel angle sensor, a wheel speed sensor for each wheel, a yaw rate sensor and a lateral accelaration sensor. These sensors provide information about the driving state of the vehicle. The ESP system then activates the brake on one or more wheels as appropriate to help prevent a skid , and more generally, to improve the feedback to the driver, and make the handling more linear.
In a typical event in which ESP comes into play, the driver decides that the vehicle is slightly too fast and wide in a corner, and so applies more steering lock. The front tyres, which are already heavily loaded laterally, supply a little more lateral force, but not enough for the driver, so he adds more steering lock. The ESP monitors the steering wheel angle and the vehicle's yaw velocity, and when the error between the two exceeds pre-programmed limits, it intervenes, and brakes the inner rear wheel (typically). This tends to cause the rear axle to slide outwards, hence pointing the nose of the car tighter into the corner, which is what the driver wanted to do. The system may also reduce the speed of the vehicle by adjusting the throttle.
In 2005, many manufacturers began making stability control standard on truck-based SUVs that are prone to tipping in emergency maneuvers. Chrysler, Ford Motor Company, and General Motors have all committed to make the system standard on all SUVs within two years.
See also: ABSABS is an acronym for: Antilock braking system Acrylonitrile butadiene styrene, a plastic Australian Bureau of Statistics, Australia's official statistical organisation American Bureau of Shipping American Bible Society Anchor Bible Series Asset Backed Se, ASR, CSVThe abbreviation CSV can have the following meanings. comma-separated values Client SMTP Validation community service volunteer computerized system validation Common Stored Value Tickets TLAs.
Car safetyCar safety is the avoidance of automobile accidents or the minimization of harmful effects of accidents, in particular as pertaining to human life and health. Special safety features have been built into cars for years, some for the safety of car's occupa Automotive technologies