Electronic Stability Program (ESP) option) - function description

Electronic Stability Program (ESP) (option) - function description Functions:

Electronic Stability Program (ESP) function description

Initialisation phase

Handling in the event of understeering

Handling in the event of oversteering Operation

Electronic Stability Program (ESP) (option) - function description

Electronic Stability Program (ESP) function description

M54.00-1838-71 If ESP detects a critical driving situation, automatic control interventions stabilise the bus by: – reducing engine power output – selectively braking individual wheels – applying the brakes at all wheels

Note:

Indicator lamp (1) flashes while the Electronic Stability Program (ESP) is intervening.

Note:

Dynamic handling control (FDR) is active only at speeds of over 5 mph (10 km/h). Dynamic handling control (FDR) is deactivated whenever reverse gear is selected.

Note:

The Electronic Stability Program (ESP) is deactivated automatically in the event of an ESP malfunction or a technically related malfunction in the Electronic Brake System.

Operation

Electronic Stability Program (ESP) (option) - function description

Initialisation phase

M54.00-1838-71 Whenever the ignition starter switch is switched to ON, the Electronic Stability Program (ESP) undergoes an initialisation process that lasts until the first few metres have been driven and the sensors are checked for correct function. Dynamic handling control (FDR) is not yet functional during the initialisation phase, although acceleration skid control (ASR) is operational. If the system determines that correct operation is guaranteed, initialisation is completed and the system is ready for operation. Indicator lamp (1) lights up for the duration of the initialisation phase.

Handling in the event of understeering

M42_25_0003_01 The front axle of the bus deviates from steered course (1) towards the offside of the road (2). Selective braking of the rear wheel on the nearside (3) restabilises the bus.

Note:

The illustration shows a 2-axle bus as an example. In the case of 3-axle buses equipped with RAS, the 3rd axle is regulated separately as necessary.

Handling in the event of oversteering

M42_25_0002_01 The bus breaks out at the rear axle. The bus deviates from steered course (4) and turns towards the near side of the road (5). Selective braking of the front wheel on the offside (6) restabilises the bus.