Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode
Patent
1986-05-06
1987-06-02
Cuchlinski, Jr., William A.
Internal-combustion engines
Engine speed regulator
Responsive to deceleration mode
188273, F02D 906
Patent
active
046694358
ABSTRACT:
An exhaust brake control system includes an input switch for commanding actuation of an exhaust brake, a throttle sensor for sensing that an accelerator pedal has been depressed in excess of a predetermined angle, a control unit for outputting a control signal in dependence upon output signals from the input switch and throttle sensor, and a valve means for opening and closing an exhaust passageway in dependence upon a control signal produced by the control unit. The control unit includes a shift sensor for sensing at least an L-range shift of an automatic transmission, and a servo hydraulic pressure sensor for sensing servo hydraulic pressure that actuates a servo piston for establishing 1st speed range. When the shift sensor senses that the automatic transmission has been shifted to the L range, the control unit outputs a control signal for actuating the valve means to open the exhaust gas passageway at such time that the servo hydraulic pressure sensor outputs a signal indicative of a value greater than a predetermined value. Exhaust braking is applied following attainment of a sufficiently high servo hydraulic pressure immediately after a downshift, thus preventing the engine from stopping at application of exhaust braking. The same is applied to downshifting to "2" range.
REFERENCES:
patent: 4114575 (1978-09-01), Nohira et al.
patent: 4149618 (1979-04-01), Horie
patent: 4354464 (1982-10-01), Fujita
patent: 4426986 (1984-01-01), Muller et al.
patent: 4557233 (1985-12-01), Joppig et al.
Furusawa Choji
Goto Shigeki
Maruchi Satoshi
Minemoto Isamu
Aisin Seiki Kabushiki Kaisha
Cuchlinski Jr. William A.
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