Abstract: A method comprises determining a temperature of a particulate matter (PM) filter in communication with an exhaust gas from an engine; and reducing a power output of the engine when the PM filter is not being regenerated and the temperature exceeds a first predetermined temperature. A control module comprises a PM filter temperature determination module that determines the temperature of a PM filter in communication with an exhaust gas from an engine; and a reduced engine power module in communication with the PM filter temperature determination module that reduces the power output of the engine when the PM filter is not being regenerated and the temperature exceeds a first predetermined temperature.

Abstract: It is intended to provide an air-fuel ratio control device for a carburetor, which is capable of variably inject fuel by opening and closing a choke valve in accordance with an opening degree of a throttle valve and the load and which is capable of achieving low cost, clean emission and fuel saving by attaining a desired air-fuel ratio in an entire operational range (rotation speed, load) of the internal combustion engine.

Abstract: In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example.

Abstract: When engine stop control is executed, an ECU estimates input power to a power storage device in accordance with an estimation of power generated by a generator and estimation of total power consumption of circuitry from the generator to the power storage device in the current state of operation. Further, the ECU compares the estimated input power with a tolerable input power to the storage device. When the generated power is excessive, the state of operation of the circuitry is changed such that the total power consumption by the circuitry increases, and then, torque output of the generator is permitted, to attain desired deceleration at the engine stop. Accordingly, in the engine stop control in which stopping force is generated by the power generating operation by the rotating electric machine, excessive charging caused by excessive power input to the power storage device can be prevented.

Abstract: An engine control system utilizes the brake specific fuel consumption (BSFC) to increase the temperature of the exhaust gas present in the exhaust pipe and determines a moving average engine speed from at least two actual engine speeds determined from a speed sensor located on the crankshaft of the engine. The control system also includes a map that uses the moving average engine speed and the actual engine speed to retrieve a solenoid duty cycle to alter the BSFC of the engine at certain RPM to increase the maximum power output of the engine.

Abstract: A method for controlling a vehicle including an internal combustion engine having an idle speed includes controlling the idle speed based on system voltage, and increasing the idle speed when system voltage is low and the vehicle speed status indicates that the vehicle is stationary. In some embodiments, idle speed may ramp up with current demanded engine speed while the vehicle is moving.

Abstract: A marine propulsion engine control system wherein the control includes an arrangement for slowing the speed of the engine by disabling certain cylinders in the event of an abnormal engine running condition. Also, an arrangement is provided for slowing the speed of the engine if a change speed transmission for driving the propulsion shaft by the engine offers more than a predetermined resistance to shifting. The controls are interrelated so that the engine protection control predominates. That is, if the engine is in protection control mode and the operator attempts a shift and more than a predetermined resistance is felt, the shift control routine will not be initiated to effect any additional engine speed reduction. In addition, when the engine speed is reduced, fuel is continued to be supplied by the fuel injectors to avoid backfiring, stalling, and uneven running. When rapid deceleration is called for the spark advance is rapidly retarded but fuel injection amount is gradually decreased.

Abstract: A starting time engine speed control device is provided for controlling fuel to be injected by correcting an amount thereof within a predetermined period of time after the start of an internal combustion engine using a starting time fuel injection control with respect to a basic fuel control. The engine is mounted on a vehicle and has a clutch mechanism which is coupled when engine speed exceeds a coupling engine speed, and the starting time engine speed control device includes a control arrangement adapted to control the fuel to be injected by gradually increasingly correcting the amount thereof in accordance with increasing engine speed up to said coupling engine speed using the starting time fuel injection control.

Abstract: Disclsoed is a system of protecting an engine of the type where a driving power is transmitted through a variable reduction gear ratio belt, in which when breaking of the belt is detected, control of stopping the engine is performed, or control of excessively enriching the air-fuel ratio of an air-fuel mixture supplied to the engine is performed and then, control of stopping the engine is performed.

Abstract: A control system for the carburetor of an internal combustion engine wherein the carburetor has a choke valve disposed at the inlet of the carburetor induction tube and the choke valve is operated automatically by an actuator. The actuator for the control includes a pulse-width modulator in which the pulse width or the degree of modulation is influenced by a family of characteristics stored in a programmable memory, the memory applying signals to the pulse-width modulator for pre-specified air-fuel mixtures in accordance with engine speed.

Abstract: A vacuum system for use in a vehicle having a brake system including a vacuum servomotor assisted master cylinder is disclosed wherein the vacuum system includes the engine intake pipe connected to the vacuum servomotor and a fuel enrichment device for enrichening the air drawn from the vacuum servomotor during slip control braking. The enrichment device includes the choke of a conventional carburetor and a servomotor for closing the choke during brake slip control. Alternatively fuel is injected into the air intake of the engine during brake slip control.

Abstract: A system for controlling the throttling of intake air and pressure of fuel injection in a diesel engine, including an intake air throttling mechanism in an intake air passage and a fuel injection apparatus in a swirl chamber. The fuel injection pressure of the fuel injection apparatus is variable. The intake air throttling mechanism is operated in accordance with predetermined operating parameters of the engine to reduce the fuel injection pressure when necessary.

Abstract: An overheat preventing system for internal combustion engines, especially for outboard engines. The engine includes a choke valve, and electromagnetic means for closing the choke valve. A thermo-switch that is responsive to engine temperature is effective to cause the electromagnetic means to close the choke valve and reduce the engine speed when the engine temperature is too hot.

Abstract: An engine control wherein a shaft driven by the engine causes a first signal to be generated and then a second signal after the shaft has rotated through a predetermined degree. The first signal starts a timer into operation, the timer producing a timer pulse of predetermined duration. Time coincidence of the timer signal and second signal indicates that a critical engine speed has been reached and such time coincidence is used to effect a control function. If the shaft rotates in the opposite direction the sequence of generation of the first and second signals in such direction is detected and used to generate a reverse-direction signal which is used to effect a control function. An automatic impedance-changing circuit enables the control to be used with a wide range of batteries.