摘要:
An air intake system for a supercharged automobile engine comprises a supercharger disposed on an air intake passage, a primary throttle valve disposed in a primary passage downstream of the supercharger and operatively coupled to an accelerator pedal, a secondary throttle valve disposed in a secondary passage and adapted to be controlled in association with the primary throttle valve, an auxiliary throttle valve in the secondary passage upstream of the secondary throttle valve, and an actuator operable to maintain the secondary throttle valve in a full open position when and so long as the load on the engine is equal to or larger than a predetermined medium load and to gradually open the secondary throttle valve with increase of the suction pressure when and so long as the load on the engine is smaller than the predetermined medium load.
摘要:
Disclosed is an engine-control apparatus in which an exhaust passageway of the engine is provided with plural sound deadening passages. A portion of the plural sound deadening passages is designed to be opened or closed by a shift valve on the basis of a predetermined switching characteristic, and the pressure of the exhaust gases is changed upon the switching of the shift valve. In order to prevent torque shock to the driven wheels which may occur attendant upon operation of the shift valve to open or close or in order to reduce probability that torque shock would occur, there is provided a torque regulating apparatus which permits an adjustment of torque generator by the engine, of a transmission efficiency of power to the driven wheel, or of a switching speed at which the shift valve is switched to open or close, or a change in the switching characteristic.
摘要:
A fuel intake system for a supercharged automotive engine having at least one engine cylinder with first and second fuel intake ports and exhaust port comprises first fuel intake passage communicated at one end to the first fuel intake port and at the other end to the supercharger through a first throttle valve, and a second fuel intake passage communicated at one end to the second fuel intake port and at the other end to the supercharger through a second throttle valve. These intake and exhaust ports are adapted such that the first fuel intake port opens at a timing preceding the closure of the exhaust port and the second fuel intake port opens after the opening of the first fuel intake port.
摘要:
An engine having a turbo-supercharger comprised of a blower in the intake passage and an exhaust gas turbine in the exhaust passage. A charging pressure limiting device includes a pressure relief passage in the intake system or a turbine bypass passage in the exhaust system which is provided with a control valve. A control circuit is provided for limiting the peak charging pressure. The control circuit includes a limit signal generating circuit for providing a limit signal which decreases in response to an increase in the engine speed under a high speed range, a comparator for comparing the limit signal with the actual charging pressure signal and producing a control signal when the charging pressure signal reaches or exceeds the limit signal so that the charging pressure does not exceed the limit value which decreases in response to an increase in the engine speed under a high speed range.
摘要:
An air supply control system for an internal combustion engine comprises a supercharging device operative to perform selectively a first supercharging operation by which supercharging efficiently under a first condition wherein the engine operates with relatively small intake air flow is improved and a second supercharging operation by which supercharging efficiency under a second condition wherein the engine operates with relatively large intake air flow is improved, an operation detector for detecting engine operations, a traveling condition detector for detecting traveling conditions to a vehicle equipped with the engine, a supercharging operation controller operative to cause the supercharging device to perform the first supercharging operation when a first engine operation attended with relatively small intake air flow is detected by the operation detector and to perform the second supercharging operation when a second engine operation attended with relatively large intake air flow is detected by the operation detector, and an operating area changer operative to vary, in accordance with traveling conditions detected by the traveling condition detector, a boundary between first and second operating areas provided on an operating characteristic chart of the engine for defining the first and second engine operations, respectively.
摘要:
A supercharging apparatus for an internal combustion engine wherein a supercharger is disposed in the intake passage of the engine. A stepwise variable transmission drives the supercharger. The transmission has a plurality of gear stages so that the rotational characteristics of supercharger can be changed. The stepwise variable transmission has a one-way clutch that interrupts the driving relation between a lower gear stage and the engine output shaft during shift-up operation. Therefore, rapid shift-up operation and shockless shift-down operation are obtained.
摘要:
An engine control system having an engine vibration sensor which detects engine vibrations. A control circuit is provided for discriminating engine roughness wherein the engine vibration level is above a predetermined level and for decreasing the fuel supply continuously when engine roughness is not detected, in order to make the mixture leaner, but increasing the fuel supply when engine roughness is detected to make the mixture richer. A detector is provided for detecting a specific engine condition wherein the mixture is enriched for specific purposes. The control circuit is responsive to the output of the engine condition detector and discontinues the roughness control when the specific engine condition is detected.
摘要:
A turbo-supercharger for an engine includes a turbine casing having a turbine scroll divided into a first and second inlet passages. The inlet passages are opened to the engine exhaust passage through first and second inlet ports formed in a mating surface where the turbine casing is attached to the exhaust passage. A shut-off valve is provided in the exhaust passage and has a valve member which is adapted to be seated on the mating surface to close the second inlet port to thereby allow the exhaust gas to flow only through the first inlet passage. The shut-off valve is opened under high speed, heavy load operation so that the exhaust gas is passed through both the first and second inlet passages. A bypass passage is provided in the turbine casing to open at one end to the first inlet passage. A waste gate valve is provided to open the bypass passage when the supercharging pressure exceeds a predetermined value.
摘要:
A rotary piston engine including a casing comprised of a rotor housing and a pair of side housings attached to the opposite sides of the rotor housing to define a rotor cavity. A substantially triangular rotor is disposed in the rotor cavity. The intake system includes a light load intake port formed in one of the side housings so as to open to the rotor cavity, a medium load and heavy load intake ports formed in the other side housing. The light load and medium load intake ports are formed so that they are opened to a working chamber before the chamber is disconnected from the exhaust port. The heavy load intake port is associated with a control valve which is closed under light and medium load operations. The medium load intake port has an effective area smaller than that of the light load intake port and is closed earlier than the light load intake port.
摘要:
An air supply control system for an internal combustion engine includes a plurality of superchargers including a turbosupercharger, an exhaust cutoff valve operative selectively to open and close an exhaust passage in which a turbine of the turbosupercharger is disposed, and an intake air cutoff valve operative selectively to open and close an intake passage in which a blower of the turbosupercharger is disposed, wherein both the exhaust cutoff valve and the intake air cutoff valve are closed when intake air mass flow fed to the engine is to be relatively small and are open when the intake air mass flow is to be relatively large, the intake air cutoff valve is delayed to be open compared with the exhaust cutoff valve when the operating condition of the engine is changed into the situation in which the intake air mass flow is to be relatively large from the situation in which the intake air mass flow is to be relatively small, and the intake air cutoff valve is delayed to be closed compared with the exhaust cutoff valve when the operating condition of the engine is changed into the situation in which the intake air mass flow is to be relatively small from the situation in which the intake air mass flow is to be relatively large.