Control device for internal combustion engine with supercharger
A control system and internal combustion engine technology, applied in engine control, internal combustion piston engine, electrical control, etc., can solve the problems of exhaust emission deterioration, achieve the effects of suppressing emission deterioration, promoting catalyst early warm-up, and promoting early warm-up
Inactive Publication Date: 2007-12-19
TOYOTA JIDOSHA KK +1
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Problems solved by technology
In particular, after a cold start of the internal combustion engine, it takes time to warm up the catalyst (that is, to raise the temperature of the catalyst to the activation temperature), so exhaust emission deterioration tends to occur
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[0030] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is an explanatory diagram of the overall configuration of an internal combustion engine using a control system for a supercharged internal combustion engine according to an embodiment of the present invention. It should be noted that the illustrated internal combustion engine is a direct-injection (type that injects fuel directly into a combustion chamber) gasoline engine. However, for example, the present invention is also applicable to a port injection type (the type that injects fuel into an intake port) gasoline engine or other internal combustion engines.
[0031]In Figure 1, 1 indicates the engine block, 2 indicates the cylinder block, 3 indicates the cylinder head, 4 indicates the piston, 5 indicates the combustion chamber, 6 indicates the electronically controlled fuel injector, 6b indicates the spark plug, 7 indicates the intake v...
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A control system for a supercharged internal combustion engine provided with a main exhaust passage (20) extending through a turbocharger turbine (21) and further through a catalyst (23, 24) to open to the outside air, an exhaust bypass passage (25) by passing the turbocharger turbine by branching from the main exhaust passage at the upstream side of the turbine and merging with the main exhaust passage before reaching the catalyst at the turbine downstream side, and an exhaust bypass valve (26) provided at the exhaust bypass passage, the control system for a supercharged internal combustion engine controlling the ignition timing in accordance with at least one of the engine warmup state and the catalyst warmup state until warmup of the internal combustion engine and warmup of the catalyst are completed and further controlling the opening degree of the exhaust bypass valve based on the control of the ignition timing, is provided.
Description
technical field [0001] The invention relates to a control system for a supercharged internal combustion engine. Background technique [0002] Generally, in a supercharged internal combustion engine, a turbocharger turbine is arranged upstream of the catalyst in the exhaust passage, so the length of the exhaust passage of the internal combustion engine from the exhaust port to the catalyst becomes longer than that of a naturally aspirated internal combustion engine . In addition, due to the increased length of the exhaust passage and the presence of the turbocharger, the heat capacity of the exhaust system increases, and the heat radiation surface area increases. Therefore, in a supercharged internal combustion engine, the temperature of the exhaust gas from the internal combustion engine decreases until it reaches the catalyst. In particular, after a cold start of the internal combustion engine, it takes time to warm up the catalyst (that is, to raise the temperature of th...
Claims
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IPC IPC(8): F02B37/18F01N3/24
CPCF01N3/101F01N13/02F02P5/1506F02D41/0255Y02T10/144F02D41/0007Y02T10/22Y02T10/26Y02T10/46F01N3/2006F01N2430/08F02B37/18F01N2013/023F01N13/0093F01N13/009Y02T10/12Y02T10/40
Inventor 入泽泰之久保田博文田中敏彦
Owner TOYOTA JIDOSHA KK