摘要:
Systems and methods for determining the presence or absence of deposits that may accumulate within a compressor recirculation valve positioned in parallel with a turbocharger compressor are presented. The systems and methods adjust actuators to maintain engine operation such that it may be more difficult for a driver to become aware that a compressor recirculation valve diagnostic is being executed.
摘要:
The disclosure relates to a method for operating a positioning actuator system with an electronically commutated actuator drive for driving an actuator element, having the following steps: non-volatile storage of a position information item of the actuator element or of a rotor of the actuator drive which was detected last as a reference position before the positioning actuator system is switched off; in the case of switching on of the positioning actuator system retrieval of the reference position and actuation of the actuator drive by energizing the actuator drive in accordance with a space phasor which is dependent on the reference position. The object is to make available an improved method for releasing blockage of an actuator element or actuation after activation of a motor system with a maximum actuating torque. For positioning actuators with commutated motors such as, for example, synchronous motors.
摘要:
Systems and methods for determining the presence or absence of deposits that may accumulate within a compressor recirculation valve positioned in parallel with a turbocharger compressor are presented. The systems and methods adjust actuators to maintain engine operation such that it may be more difficult for a driver to become aware that a compressor recirculation valve diagnostic is being executed.
摘要:
Methods are provided for determining ice formation during cruising under cold weather conditions at the intake manifold or throttle body of an engine system and for enabling engine misfire diagnostics upon detection of dissipation of the formed ice.
摘要:
Methods are provided for determining ice formation during cruising under cold weather conditions at the intake manifold or throttle body of an engine system and for enabling engine misfire diagnostics upon detection of dissipation of the formed ice.
摘要:
An intake system is provided with an intake flow control valve (300) provided in an intake port (50) upstream of an intake valve (70). The intake flow control valve (300) may be switched between at least a first position (300A) and a second position (300B), in accordance with the operating state of an engine, by rotating a rotary shaft (360), which is supported by a rotary shaft support part (350). In the first position, the clearance between the valve element and the inner wall of the intake port is small. In the second position, the clearance between the valve element and the inner wall of the intake port is large.
摘要:
A snowmobile includes an engine, a handle, an operation portion, an operation input detector, an operation amount detector, and a control portion. The handle includes a grip grasped by the rider. The operation portion is provided near the grip to control driving of the engine. The operation input detector is provided near the grip to detect whether operation of the operation portion has been carried out by the rider. The operation amount detector electrically detects the operation amount of the operation portion. The control portion controls driving of the engine based on the operation amount detected by the operation amount detector when operation of the operation portion by the rider is detected at the operation input detector.
摘要:
Provided is a throttle valve device for an internal combustion engine which is favorably protected from icing, and enables a favorable control of the intake flow rate by avoiding an abrupt increase in the flow rate particularly in a small opening angle range. An upstream recess (21) and a downstream recess (22) are formed in a lower part of the throttle bore (11) of the throttle valve device. Moisture that may deposit on the inner wall of the throttle bore is allowed to be drained to the recesses. A cross sectional area of one of the recesses over which the lower edge of the throttle valve member sweeps as the throttle valve member (30) opens from the fully closed position is smaller than that of the other recess so that an abrupt change in the intake flow rate can be avoided in a small opening angle region.
摘要:
A circuit arrangement for controlling electromagnetic valves, has a control unit that issues control signals for controlling the angular position of an electromagnetic valve and receives a reply signal regarding the value. The circuit arrangement receives the control signals of the control unit and issues the reply signal to it. A bridge circuit receives control signals from the circuit arrangement for the triggering of a valve servomotor and issues a reply signal, which indicates the angular position of the valve to the circuit arrangement. The circuit arrangement has an angular sensor that transmits a value, which indicates the angular position of the valve to the circuit arrangement. When a rise of the current of the servomotor above a predetermined threshold is detected, the bridge circuit sets a status flag. The circuit arrangement then transmits a predetermined level to the control unit, and the control unit detects the predetermined level. When a level is determined to be impermissible, the control unit requests the value, which indicates the angular position of the valve, from the circuit arrangement and processes this value.
摘要:
A control system for an internal combustion engine is disclosed. The engine has an exhaust gas recirculation device which includes an exhaust gas recirculation passage for recirculating exhaust gases from the engine to an intake system of the engine, and an exhaust gas recirculation control valve provided in the exhaust gas recirculation passage, for controlling a flow rate of the exhaust gases. An air-fuel ratio control amount is calculated based on an output of the air-fuel ratio sensor provided in the exhaust system of the engine. The air-fuel ratio of the air-fuel mixture supplied to the engine is controlled with the air-fuel ratio control amount. A failure of the exhaust gas recirculation device is determined based on a changing component of the air-fuel ratio control amount when changing an opening of the exhaust gas recirculation control valve in a predetermined cycle.