In order to use CNG as a fuel, the intake manifold for the "bivalent" version is equipped with injectors for gas operation, in addition to the injectors for petrol operation.
Due to the installation of the CNG injectors (5) on the underside of the intake manifold, the coolant must be conducted through a separate coolant pipe (7) from the EGR-cooling system to the cylinder head.
| 1 | Connection for petrol feed line | 5 | CNG injectors |
|---|---|---|---|
| 2 | Petrol distributor pipe | 6 | Connection for CNG low-pressure line (8 bar) |
| 3 | Petrol injectors | 7 | Coolant pipe from EGR valve to cylinder head |
| 4 | CNG distributor pipe |
Illustration L0008271 shows a side view of the intake manifold.
| 1 | Petrol distributor pipe | 5 | CNG distributor pipe |
|---|---|---|---|
| 2 | Electric connection for petrol injectors | 6 | Electric connection for CNG injectors |
| 3 | Petrol injectors | 7 | Coolant pipe from EGR valve to cylinder head |
| 4 | CNG injectors | 8 | Intake manifold |