Exhaust particle removing system for an internal combustion engine

Patent · Tue Jul 12 04:00:00 EDT 1988

OSTI ID:6811435

Shinzawa, M

An exhaust particle removing system is described for an engine, comprising: (a) a filter for trapping particles in exhaust from the engine; (b) means for determining whether or not the degree of clogging of the filter is unacceptable; (c) means for detecting an operating condition of the engine; (d) means for when the degree of clogging of the filter is unacceptable, throttling the flow of intake air into the engine and thus varying the pressure of the intake air in accordance with the detected engine operating condition in cases where the detected engine operating condition resides in a first predetermined range within which the temperature of the engine exhaust would be inadequate to burn off the trapped particles if the intake air flow were not throttled, the throttling means comprising a movable throttle valve disposed in an air intake passage, a bypass passage connected to the air intake passage and bypassing the throttle valve, and a movable bypass valve disposed in the bypass passage; and (e) means for, when the degree of clogging of the filter is unacceptable, allowing free flow of the intake air in cases where the detected engine operating condition resides in a second predetermined range within which the temperature of the engine exhaust would be adequate to burn off the trapped particles even if the intake air flow were not throttled.

• Assignee: Nissan Motor Co., Ltd., Kanagawa
• Patent Number(s): US 4756155
• OSTI ID: 6811435
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
BYPASSES
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST SYSTEMS
FILTERS
FLOW REGULATORS
FLUID FLOW
FLUIDS
FOULING
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PARTICLES
PARTICULATES
REMOVAL
VALVES
WASTES