Apparatus for improving fuel economy of multi-cylinder I. C. eng

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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123 32EA, B60K 4104

Patent

active

041944178

ABSTRACT:
Fuel economy of a multi-cylinder internal combustion engine has been improved by allowing, when a vehicle is at a standstill, the engine to run on selected cylinders of all. The idling operation of the engine on the selected cylinders has been made smooth by the provision of a switch valve in a control circuit of the transmission. With the switch valve, as soon as an accelerator pedal is released when the vehicle is at a standstill, hydraulic fluid will be drained from the control circuit to render a gearing of the transmission in a neutral condition even if a manually selector valve in the control circuit is held in a drive range position. This prevents transmission of load to the engine through the hydrokinetic unit which otherwise would occur when the manually selector valve is in the drive range position.

REFERENCES:
patent: 3578116 (1971-05-01), Nakajima et al.
patent: 4008567 (1977-02-01), Hirsch
patent: 4061055 (1977-12-01), Iizuka et al.
patent: 4144863 (1979-03-01), Abdoo

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