Gasoline engine particle catcher speed-reduction oil cut-off regeneration hierarchical control method and system

Abstract

The invention discloses a gasoline engine particle catcher speed-reduction oil cut-off regeneration hierarchical control method and system. Accumulated carbon in a gasoline engine particle catcher isremoved through the engine speed-reduction oil cut-off process, a vehicle-mounted ECU judges whether fuel oil supplying cut-off of an engine is allowed or not according to the current accumulated carbon carrying capacity, and when the fuel oil supply of the engine is cut off, the vehicle-mounted ECU calculates the fuel oil supply cut-off duration of the engine through the current accumulated carbon carrying amount. According to the gasoline engine particle catcher speed-reduction oil cut-off regeneration hierarchical control method and system, on the premise that unnecessary hardware is not additionally arranged, accumulated carbon in a GPF is removed through the engine speed-reduction oil cut-off process and the control method in a matched mode, carbon can be effectively removed when thecarbon carrying amount of the engine is high, meanwhile, the GPF can be protected from being damaged by the too-high regeneration temperature, and accordingly, the service life of the GPF is ensured.

Description

technical field [0001] The invention belongs to the technical field of automobile control and aims at realizing the control and protection of a gasoline particle filter (Gasoline Particle Filter) of a gasoline engine. Background technique [0002] With the increasingly stringent emission and fuel consumption regulations, it has become difficult for gasoline engines, especially supercharged direct injection gasoline engines, to achieve the regulatory goals. GPF is an effective and direct external purification device. Under low temperature and low speed conditions, particulate matter will quickly accumulate and block the GPF, which will seriously affect the engine power and damage the engine. [0003] In order to avoid the blockage of GPF, carbon cleaning measures must be considered. The deceleration process when the engine looses the throttle can effectively remove particulate matter, but there is a risk of burning the catalytic converter when the carbon load is high. However...

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Problems solved by technology

[0002] With the increasingly stringent emission and fuel consumption regulations, it has become difficult for gasoline engines, especially supercharged direct injection gasoline engines, to achieve the regulatory goals. GPF is an effective and direct external purification device. Under low temperature and low speed conditions, particulate matter will quickly accumulate and block the GPF, which will affect the power of the engine and even damage the engine if it is serious

[0003] In order to avoid the blockage of GPF, carbon cleaning measures must be considered. The deceleration process when the engine looses the throttle can effectively remove particulate matter, but there is a risk of burning the catalytic converter when the carbon load is high. However, if the fuel cutoff control is completely turned off, it will It will increase fuel consumption, and it is not conducive to the removal of carbon, which will accelerate the accumulation of carbon and cause the blockage of GPF

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