Abstract: Systems and methods are provided for determining a temperature of a thermal system that includes fluid conduits. A sensor monitors a current state of the temperature. A controller receives a signal from the sensor that is representative of the current state; determines a flow in the fluid conduits; determines a noise covariance of the thermal system; processes a thermal model of the thermal system; predicts a next-step state of the parameter at a time after the current state; and corrects the next-step state based, at least in-part, on the noise covariance resulting in a corrected next-step state.

Abstract: A method for monitoring leakage of an exhaust gas recirculation system for an engine of a vehicle includes: determining, by a controller, whether the engine is in an idle state in which the exhaust gas recirculation system is not operated; determining, by the controller, whether small flow leakage of the exhaust gas recirculation system occurs based on a predicted pressure of gas sucked into an intake manifold connected to the engine and a measured pressure of gas sucked into the intake manifold when the engine is in the idle state; and determining, by the controller, that leakage of the exhaust gas recirculation system occurs when the measured pressure is greater than the predicted pressure.

Abstract: The disclosure includes a system that includes a real-time engine model module and an adaptive control module. The real-time engine model module is configured to determine an engine parameter estimate signal based on at least one feedback signal indicative of an operating parameter of an engine. The adaptive control module is configured to receive a power request signal and receive, from the real real-time engine model module, the engine parameter estimate signal. The adaptive control module is further configured to determine a power demand signal based on the power request signal and the engine parameter estimate signal, wherein the adaptive control module is configured to determine the power demand signal based on the power request signal using a set of control laws. The adaptive control module is further configured to output the power demand signal to control at least one component of the engine.

Abstract: A system according to the principles of the present invention includes a firing fraction module, an offset generation module, and a firing fraction module. The firing fraction module determines a firing fraction based on a driver torque request. The offset generation module randomly generates an offset. The firing control module adds the firing fraction to a running total each time that a crankshaft of an engine rotates through a predetermined angle, adds the offset to the running total, and executes a firing event in a cylinder of the engine when the running total is greater than or equal to a predetermined value.

Abstract: Methods and systems for controlling combustion performance of an engine are provided. A desired fuel quantity for a first combustion cycle is determined. One or more engine actuator settings are identified that would be required during a subsequent combustion cycle to cause the engine to approach a target combustion phasing. If the identified actuator settings are within a defined acceptable operating range, the desired fuel quantity is injected during the first combustion cycle. If not, an attenuated fuel quantity is determined and the attenuated fuel quantity is injected during the first combustion cycle.

Abstract: A linear actuator (10) includes a plastic housing (12) having an integral flange (14) for mounting the actuator. A stator assembly (16), having windings (18), is disposed in the plastic housing. A rotor assembly (20), having a permanent magnet (22), is mounted for rotation with respect to the stator assembly such that when the windings are energized, a magnetic field is generated to cause rotation of the rotor assembly. A shaft (32) is restricted from rotation and is associated with the rotor assembly such that rotation of the rotor assembly causes linear movement of the shaft. Connector structure (46) houses leads for powering the windings. The plastic housing has an annular end (48) that captures an annular surface (50) of the connector structure to couple the plastic housing to the connector structure.

Abstract: An air intake device of an engine includes a throttle body provided in an intake passage of an engine, a bypass passage arranged to connect an upstream side and a downstream side of a throttle valve disposed in the throttle body, an idle number-of-revolutions control device that is disposed in the bypass passage and that controls the quantity of air passing through the bypass passage and flowing into the downstream side of the throttle valve according to the state of the engine, and a water collection portion that is disposed on the upstream side of the idle number-of-revolutions control device in the bypass passage and that is constructed so as to include a space portion connecting with the bypass passage. This structure enables smooth operation of the idle number-of-revolutions control device and prevents damage thereto caused by water in a bypass passage.

Abstract: To accurately supply idle air without influence of pulsative pressure generated within an intake passage, a lower end surface (21a2) of a bottom portion (21a) of an air control valve (21) is arranged in a contact manner via a closing member (1) toward a locking piece portion (2) fixed to an end portion of a shaft portion (20b) of a slider (20), an annular gap (S2) formed by an inner periphery (21a1) of the bottom portion (21a) and an outer periphery (20d) of the shaft portion (20b) is closed by the closing member (1) arranged in a contact manner on the lower end surface (21a2), and cuts off communication between a space portion (25), which is formed between a tube portion (21b) of the air control valve (21) and the shaft portion (20b), and a lower chamber (12g) of a valve body guide hole facing to the bottom portion (21a).

Abstract: A fast idle air amount control system in a side stand-equipped two-wheeled motor vehicle is provided in which a bypass control valve (10) is arranged so that an axis (Y) of the bypass control valve (10) is substantially horizontal along the lateral direction of a two-wheeled motor vehicle (M) when the two-wheeled motor vehicle (M) is in an upright state and slopes downward toward a side stand (41) side when the two-wheeled motor vehicle (M) is put in an inclined parked state by standing it on the side stand (41), and an actuator (25), which is electrically operated, is coupled to an end part of the bypass control valve (10) on a side opposite to the side stand (41).

Abstract: An idle air control valve assembly including a strain relief feature for a plurality of wire terminals that couple the control valve to a remote source. The strain relief feature prevents damage to solder joints attaching the wire leads to the valve assembly. Additional improvements in the idle air control valve assembly include a plurality of axially and radially extending protrusions on a peripheral surface of a valve body that assist in the alignment and retention of the valve body in a throttle body manifold of an internal combustion engine. The protrusions are operable in combination with a plurality of bolt flange tabs to ensure proper radial positioning of the valve body when inserted into the throttle body manifold.

Abstract: An idle air control valve for a vehicle includes a housing (21), a motor (32) disposed in the housing, a shaft (29) associated with the motor, and a bellows assembly (30) including a bellows structure (10) having a first end defining a base (14), a second, opened end (16), and a bellows (18) between the first and second ends. An annular rim member (28) is associated with the second opened end. A pintle (24) has surfaces defining an annular groove (26) therein. The annular rim member (28) is received, in press-fit engagement, in the annular groove (26). The base (14) is in press-fit engagement with a recess (22) in the housing and the pintle (24) is coupled with an end of the shaft, such that the bellows structure together with the pintle surround the shaft and provide a barrier substantially preventing contaminants from entering the motor.

Abstract: An intake structure is provided for a V-type internal combustion engine having cylinders banked in a V pattern. A throttle body includes a throttle valve interposed in an intake passage extending to the inner side of the V banks and bent to be parallel to a crankshaft. The throttle body is provided with a bypass passage bypassing the throttle valve. An idle control valve for opening and closing the bypass passage by being moved in a direction orthogonal to the intake passage parallel to the crankshaft is added to the throttle body. A drive shaft for moving the idle control valve is projected from an electric actuator in the state of being directed in the moving direction of the idle control valve. The resulting configuration makes it possible to reduce the size of a throttle body and to suppress the overall width of the engine.

Abstract: To improve an air bypass device in bypass air flow and designing freedom, a locking stepped part 3, a bush inserting hole 4, and a valve body drive mechanism inserting hole 5 are provided above an upper end 2a of a valve body guiding hole 2 of an air control valve main body 1, an air flow-in hole 6 is provided below a lower end 2b of the valve body guiding hole 2, and an inner peripheral wall 2c of the valve body guiding hole 2 includes a plurality of air control grooves 7a . . . extending downwardly from the locking stepped part 3 and being closed by an annular bush 11 on the locking stepped part 3 to form independent air distribution chambers 12a . . . , which are connected to intake passages 8b1 . . . at the downstream side from the respective throttle valves of multiple throttle bodies T1 . . . through bypass air passages 15a . . . .

Abstract: A fuel delivery system having an electronically controlled throttle valve operatively disposed in an intake manifold. An idle speed control valve is operatively disposed within a bypass gas flow passageway. A control system controls the actuation of both the throttle valve and idle speed control valve to control the delivery of a combustible charge to the internal combustion engine to maximize engine efficiency and minimize noxious emissions.

Abstract: A fuel delivery system for an internal combustion engine of the type having an intake manifold selectively fluidly connected to a combustion chamber and a bypass gas flow passageway having an inlet open to the intake manifold and an outlet open to the intake manifold downstream for the inlet is disclosed. The system includes an electronically controlled throttle valve operatively disposed in the intake manifold and movable between an open and a closed position to control air flow through the intake manifold. An idle speed control valve is operatively disposed within the bypass gas flow passageway, and the idle speed control valve is also movable between an open and a closed position to control air flow through the bypass gas flow passageway. A control system controls the actuation of both the throttle valve and idle speed control valve to control the delivery of a combustible charge to the internal combustion engine to maximize engine efficiency and minimize noxious emissions.

Abstract: The throttle valve control device of the present invention comprises a structural body 24 in which a throttle valve 21, a throttle shaft 22 and a throttle lever 23 are integrally connected, a return spring 26, one end of which is latched to the structural body 24, and which urges the throttle valve so as to rotate in the closing direction, a free lever 25 which is engaged with the other end of the return spring, and which can contact and move away from the structural body, and an actuator 30 which drives the free lever. The driving of the free lever by the actuator causes the structural body to pivot, so that the throttle valve is opened and closed in a specified range, thus controlling the idle speed. As a result, a throttle valve control device which has a simple structure and which can be made compact is provided.

Abstract: The present invention provides an idle speed controller comprising a guide plate having a spigot portion fixedly attached to a cylindrical projected portion of a solenoid coil assembly for guiding a shaft to and away from a plunger wherein a symmetrical central axis is maintained between the shaft and the plunger during the guiding of the shaft.

Abstract: The throttle valve control device of the present invention comprises a structural body 24 in which a throttle valve 21, a throttle shaft 22 and a throttle lever 23 are integrally connected, a return spring 26, one end of which is latched to the structural body 24, and which urges the throttle valve so as to rotate in the closing direction, a free lever 25 which is engaged with the other end of the return spring, and which can contact and move away from the structural body, and an actuator 30 which drives the free lever. The driving of the free lever by the actuator causes the structural body to pivot, so that the throttle valve is opened and closed in a specified range, thus controlling the idle speed. As a result, a throttle valve control device which has a simple structure and which can be made compact is provided.

Abstract: The present invention provides an idle speed controller comprising a guide plate having a spigot portion fixedly attached to a cylindrical projected portion of a solenoid coil assembly for guiding a shaft to and away from a plunger wherein a symmetrical central axis is maintained between the shaft and the plunger during the guiding of the shaft.