Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1989-01-23
1990-11-27
Diehl, Dwight
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74872, B60K 4106
Patent
active
049727370
ABSTRACT:
A control system for a vehicle with an automatic transmission in which the gear ratio is automatically changed in accordance with the operating condition of the vehicle includes a control means set for at least a first range if air-fuel ratios to be determined in accordance with engine speed and a second range of air-fuel ratios for controlling the air-fuel ratio of the engine to enrich a fuel mixture more than in the first range of air-fuel ratios. A shift control system has a first shift characteristic setting means for setting a first shift characteristic, and a second shift characteristic setting means for setting a second shift characteristic such that an upshift is effected in a higher vehicle speed range than that in the first shift characteristic. A characteristic changing means selects the first shift characteristic during ordinary driving (i.e. non-power driving) and the second shift characteristic during a specific operating condition. An air-fuel ratio changing means expands the first range of air-fuel ratios toward the high-speed side of engine operation when the second shift characteristic has been selected by the characteristic changing means to narrow the second range of air-fuel ratios. Thus, when an acceleration force is demanded during ordinary driving, the vehicle is driven to gain a sufficient acceleration force, and at the same time the air-fuel ratio enrichment control is restrained to control the worsening of fuel economy.
REFERENCES:
patent: 4184461 (1980-01-01), Leung
patent: 4737915 (1988-04-01), Hosaka
patent: 4739483 (1988-04-01), Ina et al.
patent: 4823642 (1989-04-01), Iwaki et al.
Diehl Dwight
Mazda Motor Corporation
Ta Khoi Q.
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