| 摘要 |
An automotive emission control system in which the engine timing is advanced an amount that is supplemental to the normal part throttle advance, in response to exhaust gas recirculation (EGR) flow, to compensate for the slower burning rate due to EGR dilution of the engine intake charge, the EGR flow being accomplished by an engine driven air pump pressure controlled by an air pump pressure modified by manifold vacuum so as to be speed and load responsive, the triggering pressure also being applied to the ignition timing distributor servo. |
