| 摘要 |
In the failsafe engine fuel control system a primary control signal, normally a direct function of an engine manifold pressure sensor signal, is utilised by an electronic engine control microprocessor to calculate control signals for engine fuel injectors and engine spark apparatus. Pressure sensor failure detection apparatus is provided which, in the event of the engine manifold pressure sensor signal being non-representive of actual engine manifold pressure, results in making the primary control signal utilised by the microprocessor a direct function of at least an analog sensor signal representative of engine throttle position rather than engine manifold pressure. Preferably, in the event of a presusre sensor failure the primary control signal is calculated as a function of both a throttle position signal and an engine speed signal. |
