US 12,140,163 B2
Hydraulic braking energy utilization for emergency steering, braking, charging accumulator(s), and/or work functions to reduce or prevent engine from overspeed, assist acceleration and/or unlimited towing
Wenling Babbitt, San Diego, CA (US); and W. E. Hoffner, III, Cleveland, OH (US)
Assigned to Applied Industrial Technologies, Inc., Cleveland, OH (US)
Filed by Applied Industrial Technologies, Inc., Cleveland, OH (US)
Filed on May 17, 2023, as Appl. No. 18/198,647.
Application 18/198,647 is a continuation of application No. 17/350,799, filed on Jun. 17, 2021, granted, now 11,674,532.
Application 17/350,799 is a continuation of application No. 16/184,195, filed on Nov. 8, 2018, granted, now 11,156,237, issued on Oct. 26, 2021.
Claims priority of provisional application 62/583,298, filed on Nov. 8, 2017.
Prior Publication US 2023/0287907 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F16H 61/4157 (2010.01); B60T 13/14 (2006.01); B62D 5/30 (2006.01); F15B 1/02 (2006.01); F15B 11/08 (2006.01); F16H 61/4096 (2010.01); F16H 61/4165 (2010.01)
CPC F15B 11/08 (2013.01) [B60T 13/141 (2013.01); B62D 5/30 (2013.01); F15B 1/022 (2013.01); F16H 61/4096 (2013.01); F16H 61/4157 (2013.01); F16H 61/4165 (2013.01); B60T 2270/402 (2013.01); F15B 2211/205 (2013.01); F15B 2211/4053 (2013.01); F15B 2211/625 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/85 (2013.01); F15B 2211/8752 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A hydraulic circuit comprising:
a pump that is configured to be driven by a prime motor;
a secondary motor fluidly that is coupled to said pump by a supply line and a return line; said secondary motor includes a high-pressure port side;
a fluid output from said secondary motor;
a first work function circuit that is fluidly coupled to said supply line and said return line; said first work function circuit includes a first work function actuator and motor control circuit; said motor control circuit is configured to a) minimize overspeeding of said prime motor, and/or b) assist in acceleration of said secondary motor; said first work function actuator is selected from the group consisting of: a) a fan drive motor, b) a generator motor, c) a cylinder, d) a rotary actuator, e) a work function motor, and f) an actuator motor that is loaded during dynamic motor braking;
a heat control circuit that is configured to reduce heat generation; said heat control circuit includes one or more of a fan pump and said fan drive motor; and
a valving arrangement that is operative to direct at least a portion of pressurized fluid output from said secondary motor during said dynamic motor braking to said heat control circuit to reduce or prevent said prime motor from overspeeding and/or to reduce heat generation in said first work function circuit; said valving arrangement includes a first pressure valve and a second pressure valve; said first and second pressure valves are configured to be activated after a predetermined pressure is sensed; said first and second pressure valves are configured to facilitate in redirecting at least a portion of said pressurized fluid to said heat control circuit when said first and second pressure valves are activated; said valving arrangement includes a first pressure transducer and a pressure reducing valve; said pressure reducing valve includes a preset setting; said pressure reducing valve is configured to allow said pressurized fluid to be directed to a fluid accumulator when said fluid pressure is at said preset setting or exceeds said preset setting; said first pressure transducer is configured to cause at least one of said first and second pressure valves to be activated when said fluid accumulator is charged at a certain level to thereby direct at least a portion of said pressurized fluid to said heat control circuit.