| 摘要 |
A method at compression braking of a vehicle comprising a combustion engine (1) with at least one cylinder (6), and a device (4) adapted for diagnosis and control of compression braking, The method comprising the steps: - during a working cycle of the combustion engine (1) when compression braking occurs, detecting movements of a cylinder head (8) belonging to said cylinder (6) or of parts in the engine (1) adjacent thereto, which movements have been generated by pressure changes or activation and deactivation of compression braking, and - determining, based on said detected pressure changes, or estimating, based on said movements generated by said activation or deactivation, braking torque caused by the compression braking. The calculated or estimated braking torque may in the current and/or in a later working cycle be used to control the compression braking. |
