Device and method for controlling vehicle

Abstract

An ECU performs a step (S100) of detecting the amount of an aqueous urea solution, a step (S104) of setting a predetermined operation line (1) if the solution amount is not less than 15% (YES in S102), a step (S108) of setting a predetermined operation line (2) if the solution amount is not less than 10% (YES in S106), a step (S110) of setting a predetermined operation line (3) if the solution amount is not not less than 10% (NO in S106), a step (S112) of controlling an engine based on a set operation line, a step (S114) of controlling a motor generator, a step (S118) of calculating the degree of deterioration in fuel consumption, and a step (S120) of performing display control.

Description

[0001] technology area [0002] The present invention relates to a control device for a vehicle equipped with an internal combustion engine, and relates to a technique for changing an operating line of the internal combustion engine in accordance with the accumulated amount of reducing agent supplied to an exhaust passage. Background technique [0003] Conventionally, an SCR (Selective Catalytic Reduction: Selective Catalytic Reduction) device is known as a device for purifying nitrogen oxides (hereinafter referred to as NOx) in exhaust gas discharged from an engine. [0004] The SCR device is a device that injects a reducing agent (for example, ammonia, etc.) into an exhaust passage of an engine, causes NOx in the exhaust gas to react with the reducing agent through a catalyst, reduces NOx, and performs purification. [0005] As control of an engine equipped with such an SCR device, for example, (Japanese) Unexamined Patent Application Publication No. 2005-147118 (Patent Docu...

AI Technical Summary

Problems solved by technology

However, if so, it sometimes creates a situation where the vehicle cannot be moved until the reductant is recharged

[0009] In the engine exhaust purification device disclosed in the above publication, when an abnormality occurs in the reducing agent adding device such as the accumulation of the reducing agent is exhausted, the engine operation is restricted or the fuel injection amount corresponding to the accelerator operation is reduced.

[0010] However, if the output of the engine is suddenly limited when the storage of the reducing agent is exhausted, there is a problem that the driver feels that the behavior of the vehicle suddenly becomes abnormal.

In addition, since the engine output is limited, there is a problem that the driver cannot exhibit the desired vehicle performance.

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