摘要:
Provided is an engine system including an engine that has a crankshaft, a rotary member that rotates around a rotation axis together with the crankshaft, a plurality of first detection bodies provided on the rotary member, a second detection body also provided on the rotary member, first and second detecting means that detect first and second detection bodies, respectively, and an ignition control means. The plurality of first detection bodies are disposed at even intervals along a rotation direction of the rotary member. The second detection body is disposed at a position different from those of the first detection bodies in a direction along the rotation axis. The first detecting means has a first detection region at a fixed position on a path that the first detection bodies pass through according to rotation of the rotary member. The second detecting means has a second detection region at a fixed position on a path that the second detection body passes through according to rotation of the rotary member, and detects the second detection body in a compression stroke of the engine. The ignition control means starts energization control for energizing the ignition coil in response to detection of the second detection body by the second detecting means.
摘要:
A control apparatus for an internal combustion engine, includes: a fuel-injection unit (22); an ignition unit (16, 17); a crank angle detection unit (27); a fuel pump (41); a booster unit (55); an ignition discharge unit (56); and a control unit (4, 56) that controls the fuel injection unit (22), the ignition unit (16, 17), and the fuel pump (41), that ascertains ignition timings based on crank signals output from the crank angle detection unit (27), and that performs a startup control sequence that is made up of fuel injection processing, voltage boosting processing, ignition processing, and fuel supply processing.
摘要:
An arrangement for a combustion engine with a control system for determining the engine's crankshaft position includes two independent sensors (S1, S2), each of which cooperates with a group of rotational position markings (r). The two sensors (S1, S2) are crankshaft sensors and they are mutually displaced (a/A) in the rotation direction relative to the midpoints of the relating respective rotational position markings so that during crankshaft rotation the direction of rotation can be determined by comparison of the sensor signal sequences from the two sensors.
摘要:
Method, control system and computer-readable medium are respectively provided for determining angular crankshaft position prior to a cranking event of an internal combustion engine. Upon issuance of an engine shutdown command, the method allows determining an initial crankshaft position based on a crankshaft position sensor (12). The method further allows providing a rulebase (24) for relating angular travel of a rotor in an accessory device (e.g., 16) to crankshaft angular travel. Angular travel of the rotor in the accessory device is sensed (e.g., 18) since issuance of the engine shutdown command until the engine reaches a resting position. The rulebase (24) is accessed to relate the value of the angular travel of the rotor in the accessory device to crankshaft angular travel and provide an incremental crankshaft angular travel relative to the initial crankshaft position at engine shutdown. Crankshaft position is calculated (e.g., 26) at the resting position based upon the initial crankshaft position plus the incremental crankshaft angular travel based on the angular travel of the rotor in the accessory device. The calculated crankshaft position corresponding to the resting position is stored (e.g., 28). Upon issuance of an engine re-start command, the stored crankshaft position corresponding to the resting position is retrieved (e.g., 14) to provide quick and accurate engine control regardless of any dead-band in the crankshaft position sensor during low engine speeds.
摘要:
Sensors for motor and a reference position sensor are integrated in a sensor magnet for detection. An annular sensor magnet is formed with a magnetized zone M1 corresponding to sensors 11U, 11V, and 11W for motor and with a magnetized zone M2 corresponding to a reference position sensor 12. The individual magnetized portions of the magnetized zone M2 are shifted as a whole in a leftward direction by a distance D from the magnetized zone M1. However, the direction of shifting has been partly reversed. Specifically, the magnetized portion 23 of the magnetized zone M2 is shifted in the right direction so that the magnetized portions 24 and 25 are narrowed accordingly. In this magnetized structure, the level of an output of the reference position sensor 12 is determined by generating triggers E1 to E6 on the rising edges of the sensor 11W for motor. Since the level is determined to be LOW only at one position, the output of the reference position sensor is fetched based on the determination.