Engine control equipment

Abstract

An engine control equipment capable of activating a catalyst and preventing exhaust gas from deteriorating in order to early perform combustion by compressive self-ignition. The engine control equipment is an engine control equipment including a catalyst for burning a mixed gas in a combustion chamber by compressive self-ignition and purifying exhaust-gas components in the combustion chamber and means for controlling the catalyst, in which the means for controlling the catalyst is provided with means for determining the activation of the catalyst and means for activating the catalyst in accordance with a determination result by the means for determining the activation of the catalyst.

What is claimed is:  
     
         1 . An engine control equipment having a catalyst for burning a mixed gas in a combustion chamber by compressing self-ignition and purifying exhaust gas components in the combustion chamber, wherein the control equipment is provided with means for controlling the catalyst and the means for controlling the catalyst is provided with means for determining the activated state of the catalyst and means for activating the catalyst in accordance with the determination result by the means for determining the activated state of the catalyst.  
     
     
         2 . The engine control equipment according to  claim 1 , wherein the means for determining the activated state of the catalyst is provided with means for detecting or estimating the temperature of the catalyst and means for determining the activation of the catalyst.  
     
     
         3 . The engine control equipment according to  claim 1  or  2 , wherein the means for activating the catalyst controls the state of an engine when the detected or estimated temperature of the catalyst is equal to or lower than a predetermined value.  
     
     
         4 . The engine control equipment according to any one of  claims 1  to  3 , wherein the means for activating the catalyst inhibits the combustion by the compressive self-ignition and performs the combustion by spark ignition when the detected or estimated temperature of the catalyst is equal to or lower than a predetermined value.  
     
     
         5 . The engine control equipment according to any one of  claims 1  to  3 , wherein the means for activating the catalyst drives a heater for the catalyst when the detected or estimated temperature of the catalyst is equal to or lower than a predetermined value.  
     
     
         6 . The engine control equipment according to any one of  claims 1  to  3 , wherein the means for activating the catalyst injects a fuel at the timing other than normal fuel injection when the detected or estimated temperature of the catalyst is equal to or lower than a predetermined value.  
     
     
         7 . The engine control equipment according to  claim 6 , wherein the means for activating the catalyst injects the fuel in the explosion or exhaust stroke of the engine in accordance with the temperature of the catalyst.  
     
     
         8 . The engine control equipment according to any one of  claims 1  to  7 , wherein the control equipment is controlled so as to early start combustion by the compressive self-ignition when the temperature detected by a temperature sensor provided to the upstream or downstream side of the catalyst becomes a predetermined value or more.  
     
     
         9 . The engine control equipment according to any one of  claims 1  to  8 , wherein the catalyst the catalyst uses a three-way catalyst or NOx catalyst provided for an exhaust pipe.