Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Kazuo Tomita

Kouhei Igarashi

Kohei Igarashi

Nobuo Habu

An optimum shift timing indicating device for a vehicle includes: a speed sensor for detecting a rotational speed of an engine or a running speed of the vehicle; a load sensor for detecting an engine load; a data processing device having a data map or maps fewer in number than gear positions of the vehicle transmission, said data map or maps having a set shift-up region and/or shift-down region selected in accordance with the rotational speed of the engine or the running speed of the vehicle and the engine load, for emitting a shift-up instruction signal and/or a shift-down instruction signal in accordance with the rotational speed of the engine or the running speed of the vehicle and the engine load; and a shift instructing device for giving a driver a shift-up instruction and/or a shift-down instruction in response to an output from said data processing device; so that instruction about the optimum shift timing can be given to the driver with the use of only a small memory capacity.

Optimum shift timing indicating device for a vehicle

An apparatus for indicating an optimum time to shift a manual transmission in a vehicle. An electronic control unit is provided to compare the actual gear shift position with the electronically memorized optimum gear shift position. The optimum gear shift position is predetermined by examining the parameters of engine speed, vehicle speed, engine load and engine temperature. If the actual gear shift position differs from the memorized and stored optimum gear shift position, the operator is notified by a shift indicator lamp or loudspeaker.

Apparatus for indicating an optimum time to shift a manual transmission

The optimum shift position indicating device of a vehicle comprising: a vehicle speed sensor for detecting a running speed of the vehicle; an engine rotation sensor for detecting a rotational speed of an engine; an engine load sensor for detecting an engine load; an operational circuit in which a driving power at present is calculated from an engine torque obtainable from the engine rotational speed and the engine load, subsequently, required engine torques at respective shift positions are calculated from the driving power, further, fuel consumption rates at the respective shift positions are obtained from the engine rotational speeds and the required engine torques at the respective shift positions, and information on the optimum shift position where the best fuel consumption rate is obtainable is outputted; and shift position indicating elements for indicating an output from said operational circuit; and capable of giving a driver the information on the optimum shift position where the best fuel consumption rate is obtainable during running condition at present.

Optimum shift position indicating device of vehicle

An ignition timing control device for an internal combustion engine incorporating exhaust gas recirculation and vacuum advancing of ignition timing, the device including a check valve which holds the largest vacuum which appears in the vacuum port during opening process of the intake throttle valve for the vacuum advancer and a delay means which delays transmission of the largest vacuum to the vacuum advancer.

Ignition timing control device for an internal combustion engine

An apparatus for treating evaporated fuel gas from a fuel tank of a motor vehicle having an internal combustion engine. The fuel treating apparatus includes a means for sensing the amount of fuel gas vapors in the fuel tank, a means for drawing the fuel vapors into the intake of the engine and a means for varying the air/fuel ratio in the intake of the engine in response to the amount of fuel gas vapors sensed in the fuel tank by the sensing means whereby a rich air/fuel mixture in the intake of the engine is prevented.

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Gotenba, Japan

Kazuo Tomita