Document ID: chunk:federal_register_of_legislation:F2017L01229:body:0:p12
Version: federal_register_of_legislation:F2017L01229
Segment Type: other
Provision Reference: 
Character Range: 31769–34636

of function other than the manufacturer's original default mode even if the vehicle would meet paragraphs 7., 7.1., 7.2. and 7.3. of this section at that level of ESC function.
7.7. ESC system technical documentation
 The documentation package shall, as confirmation that the vehicle is equipped with an ESC system that meets the definition of an "ESC System" as in paragraph 2.7. to this Regulation, include the vehicle manufacturer's documentation as specified in paragraphs 7.7.1. to 7.7.4. below.
7.7.1. System diagram identifying all ESC system hardware. The diagram shall identify those components that are used to generate brake torques at each wheel, determine vehicle yaw rate, estimated side-slip or the side-slip derivative and driver steering inputs.
7.7.2. A brief written explanation sufficient to describe the ESC system's basic operational characteristics. This explanation shall include the outline description of the system's capability to apply braking torques at each wheel and how the system modifies propulsion torque during ESC system activation, and show that the vehicle yaw rate is directly determined even under the conditions where no wheel speed information is available. The explanation shall also specify the vehicle speed range and the driving phases (acceleration, deceleration, coasting, during activation of the ABS or traction control) under which the ESC system can activate.
7.7.3. Logic diagram. This diagram supports the explanation provided under paragraph 7.7.2.
7.7.4. Understeer information. An outline description of the pertinent inputs to the computer that control ESC system hardware and how they are used to limit vehicle understeer.
 8.  Test conditions
8.1. Ambient conditions
8.1.1. The ambient temperature is between 0 °C and 45 °C.
8.1.2. The maximum wind speed is no greater than 10 m/s for vehicles with SSF > 1.25, and 5 m/s for vehicles with SSF ≤ 1.25.
8.2. Road test surface
8.2.1. Tests are conducted on a dry, uniform, solid-paved surface. Surfaces with irregularities and undulations, such as dips and large cracks, are unsuitable.
8.2.2. The road test surface has a nominal[6] peak braking coefficient (PBC) of 0.9, unless otherwise specified, when measured using either:
8.2.2.1. The American Society for Testing and Materials (ASTM) E1136 standard reference test tyre, in accordance with ASTM Method E1337‑90, at a speed of 40 mph; or
8.2.2.2. The k-test method specified in Appendix 2 to Annex 6 of Regulation No. 13-H.
8.2.3. The test surface has a consistent slope between level and 1 per cent.
8.3. Vehicle conditions
8.3.1. The ESC system is enabled for all testing.
8.3.2. Vehicle mass. The vehicle is loaded with the fuel tank filled to at least 90 per cent of capacity, and a total interior load of 168 kg comprised of the test driver, approximately 59 kg of test equipment (automated steering