Control apparatus for a rotary body for cooling an engine
AssigneeMazda Motor Corporation
InventorsReiji Okita, Noriyuki Kurio
Life of this patent
Estimating the term…
Abstract
A speed control system for an engine cooling fan has a planetary gearset, variably establishing a ratio between input and output speeds, and a hydraulic controller for changing the speed ratio according to engine operating conditions. Either one of a sun gear and pinion gear constitutes an input gear connected to an engine output of the engine. The other one of the sun gear and pinion gear is operationally coupled to a hydraulic control and a ring gear constitutes an output gear driving a rotary body. The hydraulic controller applies and varies an operational resistance to the planetary gearset according to engine operating conditions so as to cause it to vary the ratio of input and output speeds.
Claims42
A speed control system for a rotary body of an engine cooling apparatus for blowing air to an engine so as to cool the engine, said speed control system comprising:
- a planetary gear mechanism, having an input gear connected to an engine output of said engine and an output gear driving said rotary body, said planetary gear mechanism establishing a ratio of rotational speed between said input gear and said output gear;
- and
- hydraulic control means, operationally coupled to said planetary gear mechanism, for varying an operational resistance acting on said planetary gear mechanism so as to cause said planetary gear mechanism to vary said ratio of rotational speeds.
A speed control system for a rotary fan of an engine cooling apparatus disposed between an engine and a radiator for drawing air through the radiator and blowing it to the engine so as to cool the engine, said speed control system comprising:
- planetary gear means, having a pinion gear connected to an engine output of said engine, a ring gear driving said rotary fan and a sun gear formed integrally with a rotary shaft through which said planetary gear means is supported by said engine, for variably establishing a ratio of rotational speeds between said fan and said rotary shaft;
- and
- hydraulic control means for applying an operational resistance to said rotary shaft so as to cause said planetary gear means to vary said ratio of rotational speeds, said hydraulic control means including hydraulically resistance-generating means directly coupled to said rotary shaft so as to apply operative resistance to said rotary shaft and an electrically controlled valve for variably supplying a hydraulic oil to said hydraulically resistance-generating means according to operating conditions of sad engine so as to vary said operative resistance and thereby vary rotational speed of said sun gear.
A speed control system for a rotary fan of an engine cooling apparatus disposed between an engine and a radiator for drawing air through the radiator and blowing it to the engine so as to cool the engine, said speed control system comprising:
- planetary gear means, having a sun gear connected to an engine output of said engine, a ring gear driving said rotary fan, and a pinion gear, for variably establishing a ratio of rotational speeds between said fan and said rotary shaft;
- and
- hydraulic control means for applying an operational resistance to said pinion gear so as to cause said planetary gear means to vary said ratio of rotational speeds, said hydraulic control means including a reversible hydraulic pump and electrically controlled valve means for supplying a hydraulic oil, variably in volume and reversibly in direction, to said reversible hydraulic pump according to operating conditions of said engine and so as to vary said operative resistance, thereby varying a rotational speed of said pinion gear.
A speed control system for a rotary fan of an engine cooling apparatus for blowing air to an engine so as to cool the engine, said speed control system comprising:
- temperature detecting means for detecting a predetermined temperature of said engine;
- a planetary gear mechanism, having an input gear connected to an engine output of said engine and an output gear driving said rotary fan, said planetary gear mechanism establishing a ratio of rotational speeds between said input gear and said output gear;
- hydraulically resistance-generating means operationally coupled to said planetary gear mechanism for generating and applying an operational resistance to said planetary gear mechanism so as to cause said planetary gear mechanism to vary said ratio of rotational speeds;
- hydraulic control means for varying a hydraulic pressure supplied to said hydraulically resistance-generating means to vary said operational resistance according to engine operating conditions;
- and
- stopping means for stopping said hydraulically resistance-generating mean when said temperature detecting means detects said predetermined temperature so as to drop said ratio of rotational speeds between said input gear and said output gear.
Dependencies are inferred from the claim text.