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EP-4119784-B1 - METHOD FOR CONTROLLING ENGINE CONTROL DEVICE AND SADDLE TYPE VEHICLE

EP4119784B1EP 4119784 B1EP4119784 B1EP 4119784B1EP-4119784-B1

Inventors

  • NIWA JUNYA
  • OSAWA TOSHIFUMI

Dates

Publication Date
20260506
Application Date
20200311

Claims (5)

  1. A method for controlling an engine control device applied to an engine control device (100) including a first control device (70) that controls an ACG starter motor (50) directly connected to a crank shaft (C) of an engine (E), and a second control device (80) that controls a fuel injection device (90), wherein the first control device (70) is connected to a crank angle sensor (40) that detects a rotation state of the ACG starter motor (50); and the second control device (80) receives an output signal of the crank angle sensor (40) from the first control device (70) and, the first control device (70) transmits the output signal of the crank angle sensor (40) to the second control device (80) by a pulse signal at the time of normal rotation of the ACG starter motor (50), and converts the output signal of the crank angle sensor (40) into a flat signal without a pulse and transmits the flat signal to the second control device (80) at the time of reverse rotation of the ACG starter motor (50).
  2. The method for controlling the engine control device according to claim 1, wherein the second control device (80) does not execute control of the fuel injection device (90) when the signal transmitted from the first control device (70) is a flat signal without the pulse.
  3. The method for controlling the engine control device according to claim 1 or 2, wherein the first control device (70) generates a single second pulse (S) having a short pulse width and a short period based on U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40); and the second control device (80) receives the second pulse (S) from the first control device (70).
  4. The method for controlling the engine control device according to claim 3, wherein the first control device (70) generates the second pulse (S) by extracting and combining respective rising portions (A) of the U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40).
  5. The method for controlling the engine control device according to claim 1, wherein the first control device (70) generates a single second pulse (S) having a short pulse width and a short period based on U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40); and timing of output of the second pulse (S) is corrected by a pulse output from the crank angle sensor (40).

Description

Technical Field The present invention relates to a method for controlling an engine control device, and more particularly to a method for controlling an engine control device for controlling various devices necessary for driving an engine and a saddle type vehicle. Background Art Conventionally, there is known an engine control device for controlling various devices necessary for driving an engine. JP 2005 -248921 A discloses an engine control device that controls a fuel injection device, an ACG starter motor, and the like based on output signals of sensors such as a vehicle speed sensor, switches such as a starter switch, etc. Summary of Invention Problem to be solved by Invention Here, since the engine control device as disclosed in JP 2005 -248921 A controls both the ACG starter motor and the fuel injection device, the engine control device tends to increase in size. Therefore, it is conceivable to divide into a first control device (ACG-ECU) that mainly controls the ACG starter motor and a second control device (FI-ECU) that mainly controls the fuel injection device. At this time, the rotation state of the ACG starter motor also needs to be transmitted to the second control device, but for example, in a configuration in which a harness that transmits a signal of a crank angle sensor that detects the rotation state of the ACG starter motor is connected to both the first control device and the second control device, a problem that the structure becomes complicated and the production cost increases arises. Further relevant prior art is known from JP 2013 181418 A. This document discloses an engine control device comprising a first and a second control device with the aim of avoiding complexity. An object of the present invention is to solve the problems of the prior art described above and to provide a method for controlling an engine control device and a saddle type vehicle capable of efficiently transmitting a rotation state of an ACG starter motor to an engine control device divided into two. Solution to Problem In order to achieve the above object, the present invention provides a method for controlling an engine control device comprising the features of claim 1. Advantageous embodiments are the subject matter of the dependent claims. According to a first preferred embodiment, the second control device does not execute control of the fuel injection device when the signal transmitted from the first control device is a flat signal without the pulse. According to a second preferred embodiment, the first control device (70) generates a single second pulse (S) having a short pulse width and a short period based on the U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40), and the second control device (80) receives the second pulse (S) from the first control device (70). According to a third preferred embodiment, the first control device (70) generates the second pulse (S) by extracting and combining respective rising portions (A) of the U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40). According to a fourth preferred embodiment, the first control device (70) generates a single second pulse (S) having a short pulse width and a short period based on the U-phase, V-phase, and W-phase pulses output from the crank angle sensor (40), and timing of output of the second pulse (S) is corrected by a pulse output from the crank angle sensor (40). Further, the present invention can advantageously be used in connection with a saddle type vehicle. Advantageous Effects of Invention According to the invention, a method for controlling an engine control device applied to an engine control device (100) including a first control device (70) that controls an ACG starter motor (50) directly connected to a crank shaft (C) of an engine (E), and a second control device (80) that controls a fuel injection device (90), wherein the first control device (70) is connected to a crank angle sensor (40) that detects a rotation state of the ACG starter motor (50), and the second control device (80) receives an output signal of the crank angle sensor (40) from the first control device (70). Thus, a harness for transmitting the sensor signal of the crank angle sensor does not need to be connected to the second control device, the number of parts can be reduced and the structure can be simplified. According to the invention, the first control device (70) transmits the output signal of the crank angle sensor (40) to the second control device (80) by a pulse signal at the time of normal rotation of the ACG starter motor (50), and converts the output signal of the crank angle sensor (40) into a flat signal without a pulse and transmits the flat signal to the second control device (80) at the time of reverse rotation of the ACG starter motor (50), and thus the control of the ACG starter motor includes a swing-back control in which the crank shaft is reverse rotated slightly at the time of engine