Intake system for engine
An intake system for an internal combustion engine is described comprising an intake passage provided with a throttle valve, a bypass passage for feeding auxiliary air to the engine bypassing the throttle valve, a control valve provided in the bypass passage to control airflow through the bypass passage, an operating condition detecting means for detecting the engine operating condition, an auxiliary air requirement calculating means which receives the output of the operating condition detecting means and determines an auxiliary air requirement according to the engine operating condition. A target idling speed determining means receives the output of the operating condition detecting means and determines a target idling speed, an engine speed detecting means, a feedback correction amount determining means which compares the target idling speed with the actual engine speed detected by the engine speed detecting means and determines a feedback correction amount of auxiliary air according to the difference therebetween. A flow rate determining means determines the flow rate of auxiliary air on the basis of the sum of the auxiliary air requirement and the feedback correction amount of auxiliary air, a converting means for converting the flow rate into a control amount of the control valve based on the output characteristics of the control valve, and a driving means for controlling the control valve on the basis of the control amount.
- Assignee:
- Mazda Motor Corp.
- Patent Number(s):
- US 4716871
- OSTI ID:
- 5330675
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
AIR FLOW
CONTROL EQUIPMENT
CORRECTIONS
DESIGN
ENGINES
EQUIPMENT
FEEDBACK
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
MECHANICAL STRUCTURES
METERING
METERS
OPERATION
VALVES