摘要:
An air-pollution preventive system to be used in combination with an automotive internal combustion engine having a carburettor with idle and low-speed circuit, which system comprises a decleration circuit to supply, independently of the idle and low-speed circuit, an air-fuel mixture to the engine in an amount and mixture ratio that are suited for the engine operation during deceleration, the deceleration circuit being closed and opened by valve means which is controlled upon various driving conditions of the motor vehicle particularly upon vehicle speeds, angular positions of the throttle valve (or motions of the accelerator pedal), positions of the clutch pedal, vacuums in the intake manifold of the engine, or combinations of two or more of these variables.
摘要:
A centralized control system for coordinating a plurality of vehicular air-pollution preventive devices in such a manner as to minimize the harmful contents of the automotive exhaust gases. In a preferred embodiment, the system includes six air-pollution preventive devices; an ignition timing retarding device, an exhaust gas after-burning device, a fuel vapor trapping device, an exhaust gas recirculating device, an atmospheric air introducing device and a device for reducing hydrocarbon exhaust during deceleration. The system also includes five sensors; a vehicle speed sensor, an intake manifold vacuum sensor, a throttle opening sensor, an engine temperature sensor and an exhaust temperature sensor, and a controller adapted to determine the individual predetermined conditions of engine operation during which the air-pollution preventive devices are placed in operation, in accordance with electric signals supplied thereto from these sensors. The controller, upon determination of such conditions, operates to keep the devices operative.
摘要:
System for reducing the engine exhaust gas hydrocarbon content during deceleration of an automobile comprising means which is adapted to reduce the proportion of air in the air-fuel mixture to be drawn to the intake manifold of the engine when the carburetor butterfly valve is substantially fully closed with the resultant increase in the intake manifold vacuum and means for introducing atmospheric air into the intake manifold concurrently with the reduction in the proportion of air in the air-fuel mixture thereby to reduce the intake manifold vacuum.
摘要:
A method for throttle progression control to minimize tip-in noise of an internal combustion engine by allowing the engine to receive only the required air for the commanded engine acceleration. The method comprises the steps of a) providing an electronically controlled throttle body and valve, b) providing an electronic control module, c) determining the engine air flow required to satisfy a desired engine acceleration, d) providing an input to the electronic control module corresponding to the engine air flow required, e) programming the electronic control module to limit the inflow of air during engine acceleration to match the engine air flow required for achieving said desired engine acceleration, and f) actuating the throttle body and valve to provide the limited air flow through the throttle body during the desired engine acceleration.
摘要:
Several embodiments of charge forming devices including improved accelerating pumps wherein the discharge of fuel from the accelerating pump is extended in time through the use of an accumulator chamber. In addition, the accelerating pump has an upstream and downstream discharge port. The accumulator chamber is also adapted to discharge fuel into the induction passage during extreme deceleration so as to improve engine running and prevent stalling under these circumstances.
摘要:
An air-pollution preventive system to be used in combination with an automotive internal combustion engine having a carburetor of variable venturi type, which system comprises a deceleration passage to supply an air-fuel mixture to the engine in an amount and mixture ratio that are suited for the engine operation during deceleration, the deceleration passage being closed and opened by valve means which is controlled upon driving conditions of the motor vehicle particularly upon vehicle speeds, positions of the clutch pedal, vacuum in the intake manifold of the engine, or combinations of two or more of these variables.
摘要:
A method for throttle progression control to minimize tip-in noise of an internal combustion engine by allowing the engine to receive only the required air for the commanded engine acceleration. The method comprises the steps of a) providing an electronically controlled throttle body and valve, b) providing an electronic control module, c) determining the engine air flow required to satisfy a desired engine acceleration, d) providing an input to the electronic control module corresponding to the engine air flow required, e) programming the electronic control module to limit the inflow of air during engine acceleration to match the engine air flow required for achieving said desired engine acceleration, and f) actuating the throttle body and valve to provide the limited air flow through the throttle body during the desired engine acceleration.
摘要:
Apparatus for reducing the engine exhaust gas hydrocarbon content during deceleration of an automobile through the enrichment of the air fuel mixture in the slow running mixture supply flow path of a carburetor, the mixture being enriched by increasing the fuel content in response to the rapid increase in the intake manifold vacuum when decelerating.
摘要:
An improved carburetor is provided wherein a bidirectional passage is provided between an air velocity reader and a location downstream of a throttle. Metered fuel flows into the bidirectional passage adjacent the air velocity reader. Flow direction in the bidirectional passage is dependent on the pressure relationship between the ends of the bidirectional passage.