Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Alps Electric Co., Ltd.

Satoru Sunada

Shoichi Tanizawa

Takamichi Shimada

Tatsuyuki Ohashi

Masahide Saito

Hiroshi Endo

Masahiko Asakura

Kojiro Tsutsumi

Shigeru Furuki

Kenji Okamoto

Hideo Furukawa

Osahide Miyamoto

Masamitsu Fukuchi

Jun Iida

Keiichi Ishikawa

Kouji Shibuya

Hiroshi Yoshizawa

Masatoshi Shimizu

Koichiro Inukai

Toru Ishino

Ryuko Komatsu

Hiroshi Ishikawa

Hideo Fukushi

Nobumasa Toyoshima

Yasushi Okawa

Hiroyuki Nakayama

Takafumi Maruyama

An electric power generation control system for a vehicle, which enables generation of electric power by a generator as much as possible while preventing an electrical component from being overheated by power generation by the generator. The electric power generation control system selectively switches a mode of the generator between first and second modes in which an instruction voltage is higher and not higher than an allowable voltage of a wire harness, respectively. A counter value is counted up in the first mode and down in the second mode. When the counter value has reached a higher limit value, the first mode is inhibited and the power generation mode is set to the second mode. This increase the proportion of an execution time period of the first, and accordingly, when a possibility of overheating the wire harness becomes high, the instruction voltage is lowered.

Electric power generation control system for vehicle

There is provided a shift control device which is provided in a shift operation unit including: a plurality of shift positions corresponding to states of a transmission; a shift lever which selects one of the plurality of shift positions; a home position to which the shift lever automatically returns; and a shift position detecting unit which outputs a shift position signal when the shift lever is positioned in one of the plurality of shift positions, the shift control device detecting, when the shift position signal is input to the shift control device for more than a recognition time period set for the shift position where the shift lever is positioned, that the shift position is selected or that the shift operation unit has a failure, and including a deterioration state detecting unit which detects a deterioration degree of the shift operation unit, wherein the recognition time period is changed in accordance with the deterioration degree.

Shift control device

A position detection apparatus includes a position detection target member, a magnet that moves in accordance with movement of the position detection target member, and a plurality of magnetic detectors provided on a surface opposite a movement plane of the magnet. A flat yoke is provided on the reverse face of the magnet. The magnetic polarity of a peripheral side part of the magnet is opposite to the magnetic polarity of a center part thereof. The peripheral side part is formed at a regional range that can be defined on the basis of a predetermined distance(s) measured from a side edge of the yoke.

Position detection magnet and position detection apparatus

A control system for an automatic transmission of a vehicle is disclosed. The automatic transmission operates in a manual operating mode in which a shift position of the automatic transmission can be changed according to a shift instruction issued by a driver of the vehicle, or in an automatic operating mode in which the shift position is automatically selected. In the control system, a slow running intention of the driver is detected. A first shift position is set to a starting shift position at the time of starting the vehicle when the slow running intention of the driver is not detected in the manual operating mode. A second shift position which is lower in transmission gear ratio than the first shift position is set to the starting shift position when the slow running intention of the driver is detected in the manual operating mode.

Control system for an automatic transmission of a vehicle

A shift control system is arranged such that a shift lever is movable to a &ldquo;P&rdquo; position, an &ldquo;R&rdquo; position, an &ldquo;N&rdquo; position, a &ldquo;D5&rdquo; position and a &ldquo;D4&rdquo; position along a first shift guide path , it is movable also from the &ldquo;D4&rdquo; position to a &ldquo;3/M&rdquo; position along a connection shift guide path , and it is movable also along a second shift guide path , from the &ldquo;3/M&rdquo; position into a direction different from that of the connection shift guide path . When the shift lever is shifted to the &ldquo;D5&rdquo; position, the transmission is set into an automatic shift control with forward drive speed ratios up to the FIFTH speed ratio. When the shift lever is shifted to the &ldquo;D4&rdquo; position, the transmission is set into an automatic shift control with forward drive speed ratios up to the FOURTH speed ratio. When the shift lever is shifted from the &ldquo;D4&rdquo; position to the &ldquo;3/M&rdquo; position along the connection shift guide path , the transmission is set into a &ldquo;3&rdquo; range, where an automatic shift control is executed with forward drive speed ratios up to the THIRD speed ratio. Then, the shift lever at the &ldquo;3/M&rdquo; position is swiveled along the second shift guide path to shift the speed ratio of the transmission manually in steps.

Shift control system for vehicular automatic transmission

A control system of a lockup clutch of a torque converter of a vehicle automatic transmission. A basic manipulated variable is determined in response to the vehicle operating condition in accordance with a predetermined characteristic, and the lockup clutch engaging force is controlled in response to the variable. In the system, fuzzy reasoning is carried out using the detected vehicle operating parameters to correct the basic manipulated variable, and the engaging force is controlled in response to the corrected manipulated variable, when the control condition is met. The corrected manipulated variable is gradually decreased with respect to time when the vehicle driving state has shifted from a region in which the engaging force is controlled in response to the corrected manipulated variable to a region in which the lockup clutch is disengaged. In addition, the corrected manipulated variable is gradually increased when the vehicle driving state has shifted from a region in which the lockup clutch is disengaged to a region in which the engaging force is controlled in response to the corrected manipulated variable.

Control system for vehicle automatic transmission

A system for controlling a vehicle automatic transmission, in which a gear ratio to be shifted to is determined based on the vehicle speed and throttle opening degree and a clutch is supplied with hydraulic pressure such that the rotational speed of the transmission input shaft concurs with a desired rotational speed change rate. The system includes means for discriminating whether the engine load fluctuates and the operation is discontinued when it is discriminated that the engine load fluctuates. Specifically, even when the accelerator pedal is operated only somewhat rapidly and the engine output is able to follow the change in the degree of throttle opening, the degree of throttle opening nevertheless differs between that at the start of gearshift and that in the course of gearshift thereafter, causing unexpected gearshift shock to occur. The arrangement can solve the problem.

Hydraulic pressure control system for hydraulically operated vehicle

A gearshift controlling system for controlling a vehicle automatic transmission. In the system, a first alternative throttle opening degree is predetermined in case of failure of a throttle position sensor, and a second alternative throttle opening is similarly determined such that a gear ratio can be determined based on the detected vehicle speed and the second alternative engine load in a gear ratio decreasing or increasing direction. Either of the first alternative throttle opening degree or the second alternative throttle opening is selected and the gear ratio to be shifted to is determined in accordance with the predetermined gearshift schedule based on the detected vehicle speed and the selected alternative engine load, to output the gearshift command, thereby preventing unexpected gearshift to occur.

Gearshift controlling system for vehicle automatic transmission

A hydraulic pressure system for a frictional engaging element such as clutches for a vehicle automatic transmission. The engagement state of the clutches is detected from the clutch slip rate, and the desired change rate of the rotational speed of the transmission input shaft (the main shaft rotational speed) during the gearshift operation period is varied based thereon. The hydraulic pressures supplied to the clutches are controlled for bringing the actual rotational speed change rate to the desired value. Since the clutch engagement state can therefore be controlled based on the desired value, irrespective of the temperature of the oil (ATF) and aging of the clutches, it is at all times possible to secure optimum gearshift characteristics and to avoid the occurrence of gearshift shock.

A control system of a vehicle automatic transmission in which an engine load and a vehicle speed are detected and used to determine a vehicle acceleration in accordance with the pre-established characteristics. An actual vehicle acceleration is at the same time calculated in response to the detected vehicle speed. The difference therebetween is then calculated and the calculated value is added to a difference calculated earlier to obtain an average therebetween. Five gear shifting scheduling maps, for example, one for moderate hill climbing, one for level-road running, one for steep hill descent, are pre-established and in response to the average obtained, one of the maps is selected. A gear shifting is controlled based on the selected map. In a pre-determined condition, such as when the engine load changes abruptly, braking is in progress and so on, the map selection is suspended and the control is carried out using the map selected earlier.

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Wako, Japan

Satoru Sunada