| Samples | true |
| UP28 Vacuum Pumps | |
| Operating temperature |
-40°C-+100°C (< 20 min. at up to +120°C) |
| Maximum vacuum level | 86%(under ambient pressure) |
|
Pressure build-up time (with 13V and 4 I test volume) |
50% of ambient pressure: ts 6.2 s 70% of ambient pressure: ≤11.7s |
The UP28 vacuum pump is activated on demand to support the evacuation of the brake booster. The UP28 can provide the necessary vacuum for the brake booster in a wide range of situations when the internal combustion engine is unable to do so, e.g. during the cold start/warm-up phase, at high altitudes or when using the air-conditioning system. The UP28 is installed parallel to the main combustion engine and evacuates filtered air via the brake booster and flexible pneumatic hoses.
