Brake Assist System Description and Operation
System Component Description
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| Full Brake Assist | - Normal hydraulic brake assist. - Brake pedal travel and force (pressure measured - Pedal feel indicates the relation of the pedal travel to the pedal force. - Brake system applies brake pressure to the wheels to achieve decelerat that makes driver effort comforta | - Pedal ) feel: . Normal (force to travel of brake pedal). - Brake pedal effort to decel: Normal. - Pedal Travel restricted to 80 mm due to pedal simulator. ion ble. | No | No | None | None | ||
| Full Brake Assist with warni | - Normal hydraulic brake ng assist. - Driver warned with DIC | - Pedal feel: Normal. - Brake pedal effort to deceleration Normal. - Pedal | No : | No | Service Brake Assist | None | ||
| message | © 202T3r aGveenleral M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| only of detected failure. - There may be a small brake assist or pedal feel degradati dependin on if/where the air is in the system or what compone is overheat | restricted to 80 mm due to pedal simulator. on g nt ed. | |||||||
| Reduc Brake Assist | ed - Normal hydraulic brake assist available - Driver warned with DIC message but due to nature of failure, engineeri determin more warning needed. - Brake assist gain reduced in a noticeabl fashion at low | - Pedal feel: Normal - Brake Pedal effort to decel: More effort required for low decel values (noticeable) Full braking capability ng for ed increased effort. - Pedal Travel restricted to 80 mm due to pedal simulator. e | No . | No | Service Brake Assist | None | ||
| © 2023 General M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| pedal travel (not alarming) - Full braking available as pedal is depresse further. | . d | |||||||
| Reduc Brake Assist | - Normal hydraulic brake assist on 2 wheels. - Performe ed when brake system detects and isolates a leak in one of the two brake circuits. | - Pedal feel: Normal. - Brake pedal effort to deceleration Same deceleration requires double the effort. Can only d achieve 50% deceleration - Vehicle will pull slightly to the side with the Front Brake active. - Pedal Travel restricted to 80 mm due to pedal simulator. | : .Yes | Yes | Brake System Failure XXX kph/mph Top Speed Low Brake Fluid (Potentially) | ABS, ESC, and Engine Telltales Service Traction and ESC DIC Vehicle Speed Limited display from ECM | ||
| Two Whee Brake Assist | - l Normal hydraulic brake assist | - Pedal feel: Normal. - Brake pedal | Yes | Yes | Brake System Failure XXX kph/mph Top Speed | ABS, ESC, and Engine Telltales Service Traction and ESC | ||
| © 202e3f fGoertn teoral M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| on 2 wheels. - Performe when brake system detects and isolates a leak in one of the two brake circuits. | deceleration Same deceleration d requires double the effort. Can only achieve 50% deceleration - Vehicle will pull slightly to the side with the Front Brake active. - Pedal Travel restricted to 80 mm due to pedal simulator. | : . | Low Brake Fluid (Potentially) | DIC Vehicle Speed Limited display from ECM | ||||
| No Brake Assist with Electr Park Brake Assist | - Hydraulic brake assist ic not available. - Brake System uses Electric Park Brake to assist driver braking. | - Pedal feel: Slightly stiffer than normal. - Brake pedal effort to deceleration Onset of braking is similar but more force required to achieve same deceleration compared with Full Brake Assist. - Minimal non linearities in | Yes : | Yes | Brake System Failure XXX kph/mph Top Speed | ABS, ESC, and Engine Telltales Service Traction and ESC DIC Vehicle Speed Limited display from ECM | ||
| © 2023 General M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| deceleration due to use of Electric Park Brake. - Pedal travel’s almost to the floor with high effort. | ||||||||
| No Brake Assist (Push Thru) | - No hydraulic or Electric Park brake assist available. - Driver pedal force distribute equal pressure to all 4 wheels | - Pedal feel: Slightly softer than normal. - Brake pedal effort to deceleration Onset of braking requires more travel AND more force required to achieve same deceleration s compared with No Brake Assist with Electric Park Brake Assist. - Pedal Travel’s almost to the floor with high effort. | : Yes | Yes | Brake System Failure XXX kph/mph Top Speed (Not displayed for full power loss or critical micro failures) | ABS, ESC, and Engine Telltales Service Traction and ESC DIC Vehicle Speed Limited display from ECM | ||
| Two Whee No Brake Assist | - l Hydraulic brake assist | - Pedal feel: Significantly softer than | Yes | Yes | Brake System Failure XXX | ABS, ESC, and Engine Telltales Service Traction | ||
| © 202n3o Grmenael.ral M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| (2 Whee Push Thru) | not l available. - Brake system applies and releases Electric Park Brake proportio to driver pedal force to assist driver braking. | - Brake Pedal effort to deceleration Onset of braking requires more travel AND more force nal required to achieve same deceleration compared with No Brake Assist. - Vehicle will pull slightly to the side with the Front Brake active. - Pedal Travel’s almost to the floor with high effort. | : | kph/mph Top Speed | and ESC DIC Vehicle Speed Limited display from ECM | |||
| Brake Fade Detec Level 1 | - Normal ted hydraulic brake assist available. - Brakes system estimates brake temps of 500 - 600 deg C. - Driver warned with | - Pedal feel: Normal - Brake Pedal effort to deceleration Not significantly changed - Pedal Travel restricted to 80 mm due to pedal simulator. | No : | No | Reduce Braking to Avoid Overheating | None | ||
| © 2023 General M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays | ||
|---|---|---|---|---|---|---|---|---|
| DIC display. - Brake assist gain reduced in a noticeabl fashion at low pedal travel (not alarming) - If brake assist gain was not changed, the brake over- temp would not be as noticeabl as on vacuum brake system. | e . e | |||||||
| Brake Fade Detec Level 2 | - Same as Level ted 1 but brake temperat 700 - 900 deg C. - Degradat in brake lining output may become noticeabl - Degradat | - Pedal feel: Normal. - Brake ure Pedal effort to deceleration Increase in effort ion required based on temperature of brake which decreases e. brake pad output. ion | Yes : | Yes | Brakes Overheated Service Now | None | ||
| © 2023 General M | otors. All rig | hts reserved. |
| Brak Assis Oper Mode | e t Description ating | Vehicle Braking Behavior | Vehicle Speed limited to XXX kph/mph | Red Brake Telltale | DIC | Other Displays |
|---|---|---|---|---|---|---|
| in response time may become noticeabl - Far better performa than a vacuum system. | - Pedal Travel restricted to 80 mm due to e. pedal simulator. nce |