Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Hiroto Tanaka

Rihito Kaneko

Kenji Senda

Satoshi Masuda

Satoshi Watanabe

Norihito Hanai

Yasuhiro Yamasako

Jun Aoki

Takashi Yoshida

Akito Onishi

Mitsutoshi Kato

Tomoko Kodama

Takeshi Enosaki

Katsuhiko Furuta

Tomohiro Kisaku

A relay device may include a plurality of communication circuits and a state control portion. The relay device may relay the data among a plurality of buses, each of which connecting one or more nodes. The plurality of communication circuits may perform transmission and reception of the data, and transition among a plurality of states including a transmission enabled state and a transmission disabled state. The plurality of communication circuits may be connected to the plurality of buses in one to one manner. The state control portion may cause a specific communication circuit to transition from the transmission enabled state to the transmission disabled state when a relay transition time has elapsed from an occurrence of predetermined event. The specific communication circuit may represent at least one of the plurality of communication circuits to which at least one of the plurality of buses connecting the specific node is connected.

Relay device

A vehicle-mounted control device, which communicates with a vehicle-mounted node via a common bus and follows a communication protocol that the lower the priority of a data frame output from the vehicle-mounted node, the longer a waiting time, includes: an arbitration device that suspends transmission of the transmission target frame to the bus when the priority of a transmission target frame is lower than an output data frame from the vehicle-mounted node, and continues transmission of the transmission target frame to the bus when the priority of the transmission target frame is higher than the output data frame; and a change device that changes the priority of the transmission target frame to be the highest of all data frames when the transmission of the transmission target frame is suspended for a prescribed time or longer as a result of arbitration control by the arbitration device.

Vehicle-mounted control device

The apparatus of the present invention corrects a control target value of ignition timing using a multipoint learned value AGdp(n) for compensating for a change amount of the ignition timing caused by time-dependent change of the engine and a basic learned value AG(i) for compensating for a change amount of the ignition timing caused by a factor other than the aforementioned time-dependent change of the engine. In a multipoint learning range n in which the time-dependent change of the engine influences the ignition timing to a great extent, the control target is corrected using the multipoint learned value AGdp(n) and the basic learned value AG(i). In ranges other than the multipoint learning range n, the control target is corrected using only the basic learned value AG(i). Normally, only the learning of the multipoint learned value AGdp(n) is permitted in the multipoint learning range n, and only the learning of the basic learned value AG(i) is permitted in the ranges other than the multipoint learning range n. When it is determined that there is a possibility that fuel has been fed to a fuel tank, the learning of the multipoint learned value AGdp(n) is prohibited for a subsequent predetermined period (if NO in step Sor step S).

Ignition timing controller of internal combustion engine

An output signal of a knock sensor is filtered with a plurality of band-pass filters to extract vibration waveform components of a plurality of frequency bands (f-f). Weighting coefficients (G-G) which multiply the vibration waveform component of each frequency band are established in such a manner as to be a small value as a noise intensity of each frequency band becomes larger. Thereby, the vibration waveform component of a plurality of frequency bands is synthesized by weighting according to an influence of a noise intensity of each frequency band. Even when the noise is superimposed on the vibration waveform component of any of the frequency bands, it becomes possible to reduce the influence of the noise and to synthesize the vibration waveform component of each frequency band, and an accurate knock determination can be performed based on the composite vibration waveform.

Knock determining device

An engine ECU executes a program including the steps of: calculating a knock magnitude N by dividing an integrated value lpkknk obtained by integrating the magnitude of vibration in the knock detection gate by BGL; controlling ignition timing according to a result of comparison between knock magnitude N and a determination value VJ; stopping updating of a standard deviation &#x3c3; when it is determined that determination value VJ to be compared with knock magnitude N is to be changed; updating a median value VM by increasing an update amount of median value VM; and updating BGL according to median value VM and standard deviation &#x3c3;.

Ignition timing controlling apparatus and ignition timing controlling method for internal combustion engine

A 90&#xb0; integrated value calculating unit of an engine ECU calculates a 90&#xb0; integrated value obtained by integrating a magnitude. A calculating unit calculates a knock magnitude by dividing 90&#xb0; integrated value by a BGL. A value obtained by subtracting a standard deviation &#x3c3; from a median value of 90&#xb0; integrated value is determined as the BGL. An ignition timing control unit controls the ignition timing depending on whether knock magnitude is equal to or larger than a determination value. A median value calculating unit calculates median value of 90&#xb0; integrated value. A standard deviation calculating unit calculates standard deviation of 90&#xb0; integrated value. A first stop unit stops updating of median value and standard deviation when 90&#xb0; integrated value is smaller than a first threshold value or is equal to or larger than a second threshold value.

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Toyota, Japan

Hiroto Tanaka