Compact high efficiency fuel heater with integral thermostatic c

Details Compact high efficiency fuel heater with integral thermostatic c Compact high efficiency fuel heater with integral thermostatic c

1990-10-11

1991-08-06

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Heating of combustible mixture

123552, F02M 3100

Patent

active

050368257

ABSTRACT:
A fuel heater for maintaining the temperature of fuel delivered to an engine in a desired range includes a body (12) having a fuel inlet (14) and a fuel outlet (16). A shell and tube assembly (39) in a heat exchanger portion (20) of said body is supplied with hot coolant from the engine, which serves as a heat source. A thermostatic actuator (58) adjacent the fuel outlet extends a plunger rod (76) responsive to increasing temperature. A valve assembly includes a movable cylindrical member (66) and a conical member (72) which includes a number of orifices (74) therethrough. The body includes a conical seat (70) conforming in profile to the conical member. When the fuel is cold it passes from the inlet through an opening (38), and into the shell and tube assembly (39) to be heated. Fluid then flows through a conduit (50), past thermostatic actuator (58) and leaves the body through the outlet. With increasing fuel temperature the plunger rod moves the cylindrical member to block the opening (38) while moving the conical member off its seat providing for fuel passage through the orifices therein. Movement of the cylindrical and conical members by the thermostatic actuator maintains the fuel delivered at the outlet of the fuel heater within the desired temperature range.

REFERENCES:
patent: 4249501 (1981-02-01), Ehresmann
patent: 4386584 (1983-06-01), Calkins
patent: 4401091 (1983-08-01), Costello et al.
patent: 4434773 (1989-03-01), Granetzke
patent: 4527533 (1985-07-01), Laramee
patent: 4754741 (1988-07-01), Houtman

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