Apparatus for controlling boost pressure in turbocharged internal combustion engines
This patent describes an apparatus for controlling ignition timing and boost pressure in an internal combustion engine equipped with a turbocharger for applying a boost pressure into a combustion chamber of the engine, comprising: a first means for detecting an angular position of an engine crankshaft to generate an output signal indicative of engine speed; a second means for detecting a state of engine load to generate an output signal in response thereto; a third means for detecting a knock condition of the engine to generate an output signal in response thereto; ignition control means for receiving the output signals of the first, second and third means to determine a basic ignition timing of the engine based upon the detected engine speed and when the knock condition is detected, adjusting the basic ignition timing in a retard direction; ignition means for receiving an output signal of the ignition control means to ignite an air/fuel mixture in the combustion chamber of the engine; boost pressure reduction control means for receiving the output signal of the ignition control means to compare the determined ignition timing with a reference ignition timing and when the determined ignition timing is found to exceed the reference ignition timing in the retard direction, generating an output signal to reduce the boost pressure applied to the engine through the turbocharger.
- Assignee:
- Honda Giken Kogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4788822
- OSTI ID:
- 6484352
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMBUSTION CHAMBERS
COMPRESSORS
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
ENGINES
EXHAUST SYSTEMS
HEAT ENGINES
IGNITION
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
METERING
OPERATION
PRESSURE CONTROL
SUPERCHARGERS
TIMING PROPERTIES
TURBOCHARGERS