摘要:
An internal combustion engine (23) includes: a crankcase (24) that supports a crankshaft (33) rotatably about a rotational axis (28); a cylinder block (25) connected with the crankcase (24) and including at least one pair of cylinders (42a) that sandwich a valve chamber (45) therebetween in an axial direction of the crankshaft (33), the valve chamber (45) housing therein a valve actuating mechanism (48) that connects a camshaft (49) to the crankshaft (33); a detected member (78) disposed between crank pins (38) corresponding to the pair of cylinders (42a), the detected member (78) rotating integrally with the crankshaft (33); and a detection sensor (83) disposed to face a trajectory of the detected member (78) and generating a pulse signal in accordance with movement of the detected member (78). Accordingly, the internal combustion engine (23) can avoid displacement of a nearby part and enlargement of the crankcase (24) as much as possible, while allowing the detected member (78) to be increased in size.
摘要:
When the operating characteristics of an intake valve are changed by an intake valve stop mechanism (8), an ECU (26) outputs a command signal (control on) to a solenoid (68). At this time, a timing, at which the command signal is output to the solenoid (68), is determined on the basis of a rotational position of a crankshaft, calculated from a signal of a crank position sensor (28). However, the output timing is corrected on the basis of a rotational phase difference of a camshaft (4) with respect to the crankshaft.
摘要:
An internal combustion engine comprising a variable valve lift system (4) whereby the engine can operate selectively in either of at least two valve lift modes, and a variable valve timing system (8), as well as a method for controlling valve timing in such an engine are presented. The method comprises providing, in connection to a valve lift mode shift, a control pulse (14) for the VVT actuator (8a).
摘要:
A cam phase control system for an internal combustion engine, which is capable of suppressing deviation of the cam phase which is caused by a sudden change in the engine speed due to the structure of a variable cam phase mechanism, thereby securing excellent controllability and high control accuracy. The cam phase control system of the engine comprise an ECU and an electromagnetic variable cam phase mechanism. The ECU calculates an SLD control input for causing the cam phase to converge to a target cam phase by equations (1) to (6), calculates a gain-adjusted value by modulating the SLD control input by equations (20) to (25), calculates a correction value according to the engine speed NE, and calculates a control input for controlling the variable cam phase mechanism by correcting the gain-adjusted value by the correction value.
摘要:
Disclosed is a vehicle control apparatus which can execute a start-up control for improving acceleration performance at the time of starting an internal combustion engine during the running of a hybrid vehicle. When a hybrid ECU determines that a predetermined time (T1) has not yet elapsed after termination of the start-up control of the engine (NO in Step (S12)), and that the hybrid vehicle is in a high speed, high load condition, but not in a warming-up state (YES in Step (S13)), the hybrid ECU sets a value Nupest2 larger than a value Nupest1, that is usually set as a maximum value Krmx of a rise rate of an engine rotational speed (Step (S 15)).
摘要:
When a catalytic converter is to be warmed up, a required efficiency (ηtag) for internal combustion engine control is set to a value within a range of less than 1, 1 representing a value when the conversion catalyst is not to be warmed up. The value is increased with an increase in delay of an open-close timing (VT) of an intake valve (steps S130 to S160). A delayed amount of a target ignition timing (IT*) is decreased with an increase in required efficiency (ηtag closer to the value 1; steps S170 and S180).